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Dr. Aleksander Czekanski
Department of Mechanical Engineering, York University, Toronto, ON M3J 1P3, Canada

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Research Keywords & Expertise

0 Finite element method
0 Selective laser melting
0 Powder Compaction
0 Effective thermal conductivity
0 Additive manufacturing modeling

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Finite element method
Selective laser melting
Effective thermal conductivity

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Preprint content
Published: 16 July 2021
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ACS Style

Elli Gkouti; Burak Yenigun; Krystof Jankowski; Aleksander Czekanski. Experimental Study of Mullins Effect in Natural Rubber for Different Stretch Conditions. 2021, 1 .

AMA Style

Elli Gkouti, Burak Yenigun, Krystof Jankowski, Aleksander Czekanski. Experimental Study of Mullins Effect in Natural Rubber for Different Stretch Conditions. . 2021; ():1.

Chicago/Turabian Style

Elli Gkouti; Burak Yenigun; Krystof Jankowski; Aleksander Czekanski. 2021. "Experimental Study of Mullins Effect in Natural Rubber for Different Stretch Conditions." , no. : 1.

Preprint content
Published: 16 July 2021
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ACS Style

Daphene Solis; Aleksander Czekanski. Development of a 4D Printed Thermo-Responsive Hydrogel for Tissue Engineering. 2021, 1 .

AMA Style

Daphene Solis, Aleksander Czekanski. Development of a 4D Printed Thermo-Responsive Hydrogel for Tissue Engineering. . 2021; ():1.

Chicago/Turabian Style

Daphene Solis; Aleksander Czekanski. 2021. "Development of a 4D Printed Thermo-Responsive Hydrogel for Tissue Engineering." , no. : 1.

Original article
Published: 01 March 2021 in Mechanics of Advanced Materials and Structures
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Recent advances in additive manufacturing technologies have simplified the implementation of lattice structures for different applications. Consequently, FEA packages are moving in the direction of incorporating lattice structure optimization as standard design tools. In this work, we evaluate two lattice structure design methodologies; a continuum-based analytical model vs. a numerical technique implemented in Altair HyperWorks. Comparison samples are verified using FEA and further validated using 3D printing and mechanical testing. FEA results showed comparable performance of the analytical vs. numerical models, but experimental validation showed some discrepancies attributed to the manufacturing method rather than the design process itself.

ACS Style

Mohamed Abdelhamid; Aleksander Czekanski. An experimental investigation of analytical vs. numerical lattice structure design tools. Mechanics of Advanced Materials and Structures 2021, 1 -13.

AMA Style

Mohamed Abdelhamid, Aleksander Czekanski. An experimental investigation of analytical vs. numerical lattice structure design tools. Mechanics of Advanced Materials and Structures. 2021; ():1-13.

Chicago/Turabian Style

Mohamed Abdelhamid; Aleksander Czekanski. 2021. "An experimental investigation of analytical vs. numerical lattice structure design tools." Mechanics of Advanced Materials and Structures , no. : 1-13.

Journal article
Published: 13 February 2021 in Journal of Materials Research and Technology
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Anisotropy is one of the main limitations in the effective design of 3D printed structures. Further, experimental evaluation of the material behaviour of printed parts is tedious, and expensive. An alternate solution is computational material modeling of printed parts. In the present work, the computational homogenization is applied to estimate the final constitutive behaviour of parts printed with polymeric composite material. To begin, the mesostructure of layers of the printed parts was considered for finite element modeling of the representative volume element (RVE), and to determine their elastic moduli. Computationally estimated material properties were higher than experimental values, and the percent difference between them was higher for parts made of ABS polymer containing short carbon fibers (sCF) versus ABS alone. The computational models provided more insights on the final properties of 3D printed parts for different materials. Further, the stress contours of the RVEs revealed that the printed parts are prone to two different failure types: delamination and fiber pull-out. Also, the lateral and transverse elastic moduli of layers were found to be approximately the same, and therefore the constitutive behaviour of the layers can be treated as transversely isotropic material. In summary, this research work represents an important step towards enabling the effective design and analysis of 3D printed structures using computational methodology.

ACS Style

Madhukar Somireddy; Aleksander Czekanski. Computational modeling of constitutive behaviour of 3D printed composite structures. Journal of Materials Research and Technology 2021, 11, 1710 -1718.

AMA Style

Madhukar Somireddy, Aleksander Czekanski. Computational modeling of constitutive behaviour of 3D printed composite structures. Journal of Materials Research and Technology. 2021; 11 ():1710-1718.

Chicago/Turabian Style

Madhukar Somireddy; Aleksander Czekanski. 2021. "Computational modeling of constitutive behaviour of 3D printed composite structures." Journal of Materials Research and Technology 11, no. : 1710-1718.

Journal article
Published: 29 September 2020 in Materials
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For viscoelastic materials, the relationship between stress and strain depends on time, where the applied strain (or stress) can be expressed as a step function of time. In the present work, we investigated two temporary effects in the response of viscoelastic materials when a given strain is applied and then removed. The application of strain causes a stress response over time, also known as relaxation. By contrast, recovery is the response that occurs following the removal of an applied stress or strain. Both stress and relaxation constitute transient stages of a viscoelastic material exposed to a permanent force. In the current work, we performed several experimental tests to record the recovery in response to the total or partial removal of the strain. By observing and analyzing the mechanical response of the material to strain, we deduced that recovery is a procedure not only related to creep but also to relaxation. Hence, we created a model that simulates the behavior of viscoelastic materials, contributing to the prediction of relevant results concerning different conditions.

ACS Style

Elli Gkouti; Burak Yenigun; Aleksander Czekanski. Transient Effects of Applying and Removing Strain on the Mechanical Behavior of Rubber. Materials 2020, 13, 4333 .

AMA Style

Elli Gkouti, Burak Yenigun, Aleksander Czekanski. Transient Effects of Applying and Removing Strain on the Mechanical Behavior of Rubber. Materials. 2020; 13 (19):4333.

Chicago/Turabian Style

Elli Gkouti; Burak Yenigun; Aleksander Czekanski. 2020. "Transient Effects of Applying and Removing Strain on the Mechanical Behavior of Rubber." Materials 13, no. 19: 4333.

Journal article
Published: 18 July 2020 in Materials
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To optimize the mechanical performance of fused deposition modelling (FDM) fabricated parts, it is necessary to evaluate the influence of process parameters on the resulting mechanical performance. The main focus of the study was to characterize the influence of the initial process parameters on the mechanical performance of thermoplastic polyurethane under a quasi-static and high strain rate (~2500 s−1). The effects of infill percentage, layer height, and raster orientation on the mechanical properties of an FDM-fabricated part were evaluated. At a quasi-static rate of loading, layer height was found to be the most significant factor (36.5% enhancement in tensile strength). As the layer height of the sample increased from 0.1 to 0.4 mm, the resulting tensile strength sample was decreased by 36.5%. At a high-strain rate of loading, infill percentage was found to be the most critical factor influencing the mechanical strength of the sample (12.4% enhancement of compressive strength at 100% as compared to 80% infill). Furthermore, statistical analysis revealed the presence of significant interactions between the input parameters. Finally, using an artificial neural networking approach, we evaluated a regression model that related the process parameters (input factors) to the resulting strength of the samples.

ACS Style

Muhammad Salman Chaudhry; Aleksander Czekanski. Evaluating FDM Process Parameter Sensitive Mechanical Performance of Elastomers at Various Strain Rates of Loading. Materials 2020, 13, 3202 .

AMA Style

Muhammad Salman Chaudhry, Aleksander Czekanski. Evaluating FDM Process Parameter Sensitive Mechanical Performance of Elastomers at Various Strain Rates of Loading. Materials. 2020; 13 (14):3202.

Chicago/Turabian Style

Muhammad Salman Chaudhry; Aleksander Czekanski. 2020. "Evaluating FDM Process Parameter Sensitive Mechanical Performance of Elastomers at Various Strain Rates of Loading." Materials 13, no. 14: 3202.

Journal article
Published: 12 July 2020 in Materials & Design
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Among its many benefits, additive manufacturing (AM) offers considerable freedom in the design of 3D printed parts; however, anisotropy remains a primary concern. This work investigates the final material behavior of parts fabricated with different printing strategies, and especially focused on anisotropy due to change in build orientation of the model. Further, implications in employing classical laminate mechanics for characterizing the mechanical behavior of printed parts are discussed in detail. Mechanical testing on printed test coupons revealed that build orientation significantly influenced the final properties, with properties being especially poor in parts built with upright orientation. Further, the overall performance of parts made of composite material is lower than that of polymeric parts. Finally, mechanical performance of 3D printed functional part was assessed to demonstrate the influence of printing strategy on its final material behavior under actual loading scenario. It was revealed that the mechanical performance of the printed functional part was substantially influenced by its build orientation and material composition. This investigation provides new insights of printing strategy–property relationship on mechanical performance of 3D printed parts.

ACS Style

M. Somireddy; A. Czekanski. Anisotropic material behavior of 3D printed composite structures – Material extrusion additive manufacturing. Materials & Design 2020, 195, 108953 .

AMA Style

M. Somireddy, A. Czekanski. Anisotropic material behavior of 3D printed composite structures – Material extrusion additive manufacturing. Materials & Design. 2020; 195 ():108953.

Chicago/Turabian Style

M. Somireddy; A. Czekanski. 2020. "Anisotropic material behavior of 3D printed composite structures – Material extrusion additive manufacturing." Materials & Design 195, no. : 108953.

Book chapter
Published: 25 January 2020 in Encyclopedia of Continuum Mechanics
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ACS Style

Aleksander Czekanski; Volodymyr Vasylovych Zozulya. Dynamic Variational Principles with Application for Contact Problems with Friction. Encyclopedia of Continuum Mechanics 2020, 702 -715.

AMA Style

Aleksander Czekanski, Volodymyr Vasylovych Zozulya. Dynamic Variational Principles with Application for Contact Problems with Friction. Encyclopedia of Continuum Mechanics. 2020; ():702-715.

Chicago/Turabian Style

Aleksander Czekanski; Volodymyr Vasylovych Zozulya. 2020. "Dynamic Variational Principles with Application for Contact Problems with Friction." Encyclopedia of Continuum Mechanics , no. : 702-715.

Journal article
Published: 06 December 2019 in Journal of Multiscale Modelling
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Microstructure and defect development in the gas tungsten arc weld process is influenced by the solidification and melt-pool dynamics. Melt-pool geometrical parameters which depend mainly on heat input have profound influence on the dendrite growth velocity and growth pattern in the melt pool. Temperature magnitude and history during the process directly determine the molten pool dimensions and surface integrity. However, due to the transient nature and small size of the molten pool, the temperature gradient and the molten pool size are very challenging to measure and control. The proposed research aims to establish a methodology for characterizing direct energy deposited metals by linking processing variables to the resulting microstructure and subsequent material properties. Secondary Dendrite Arm Spacing (SDAS) optical metallographic measurements of equiaxed solidified IN-738LC gas tungsten arc welds were conducted to find a new expression that links the cooling rate that is imposed on the welding during solidification, and the resultant scale of the grain substructure.

ACS Style

E. A. Bonifaz; J. M. Conde; A. Czekanski. Determination of Secondary Dendrite Arm Spacing for In-738LC Gas-Tungsten-Arc-Welds. Journal of Multiscale Modelling 2019, 10, 1 .

AMA Style

E. A. Bonifaz, J. M. Conde, A. Czekanski. Determination of Secondary Dendrite Arm Spacing for In-738LC Gas-Tungsten-Arc-Welds. Journal of Multiscale Modelling. 2019; 10 (4):1.

Chicago/Turabian Style

E. A. Bonifaz; J. M. Conde; A. Czekanski. 2019. "Determination of Secondary Dendrite Arm Spacing for In-738LC Gas-Tungsten-Arc-Welds." Journal of Multiscale Modelling 10, no. 4: 1.

Original
Published: 22 November 2019 in Archive of Applied Mechanics
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First-order models are used in the analysis of the tension–compression and transverse bending modes of beam vibration. The equation of motion for each mode and the expressions for boundary conditions are obtained using the generalized variational principle. Systems of partial differential equations for the longitudinal and bending modes of vibrating beams are reduced to a single fourth-order equation, and frequency equations are obtained. The problem of free and forced vibrations of beams that are simply supported at both ends is presented. An analysis and comparison with well-known theories is performed using computer algebra system Mathematica.

ACS Style

A. Czekanski; V. V. Zozulya. Dynamics of vibrating beams using first-order theory based on Legendre polynomial expansion. Archive of Applied Mechanics 2019, 90, 789 -814.

AMA Style

A. Czekanski, V. V. Zozulya. Dynamics of vibrating beams using first-order theory based on Legendre polynomial expansion. Archive of Applied Mechanics. 2019; 90 (4):789-814.

Chicago/Turabian Style

A. Czekanski; V. V. Zozulya. 2019. "Dynamics of vibrating beams using first-order theory based on Legendre polynomial expansion." Archive of Applied Mechanics 90, no. 4: 789-814.

Journal article
Published: 20 November 2019 in Materials
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The main aim of this research is to present complete methodological guidelines for dynamic characterization of elastomers when subjected to strain rates of 100/s–10,000/s. We consider the following three aspects: (i) the design of high strain rate testing apparatus, (ii) finite element analysis for the optimization of the experimental setup, and (iii) experimental parameters and validation for the response of an elastomeric specimen. To test low impedance soft materials, design of a modified Kolsky bar is discussed. Based on this design, the testing apparatus was constructed, validated, and optimized numerically using finite element methods. Furthermore, investigations on traditional pulse shaping techniques and a new design for pulse shaper are described. The effect of specimen geometry on the homogeneous deformation has been thoroughly accounted for. Using the optimized specimen geometry and pulse shaping technique, nitrile butadiene rubber was tested at different strain rates, and the experimental findings were compared to numerical predictions.

ACS Style

Muhammad Salman Chaudhry; Aleksander Czekanski. FE Analysis of Critical Testing Parameters in Kolsky Bar Experiments for Elastomers at High Strain Rate. Materials 2019, 12, 3817 .

AMA Style

Muhammad Salman Chaudhry, Aleksander Czekanski. FE Analysis of Critical Testing Parameters in Kolsky Bar Experiments for Elastomers at High Strain Rate. Materials. 2019; 12 (23):3817.

Chicago/Turabian Style

Muhammad Salman Chaudhry; Aleksander Czekanski. 2019. "FE Analysis of Critical Testing Parameters in Kolsky Bar Experiments for Elastomers at High Strain Rate." Materials 12, no. 23: 3817.

Journal article
Published: 11 October 2019 in Engineering Failure Analysis
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This study investigates the mechanical behaviour of 3D printed composite parts with short carbon fiber (SCF) reinforcements by conducting mechanical testing. Further, this study examines the relevance of the mechanics of traditional composite laminates for characterizing the mechanical behaviour of printed parts. Initially, test coupons were 3D printed with different layer thicknesses and printing directions. The test coupons were then subjected to mechanical testing. Test results reveal that the tensile properties of thin-layered printed parts are better than those of thick-layered printed parts, but not the interlaminar properties. Thick-layered parts performed poorly under tensile loads because of the presence of undesirable enclosed voids within the extruded fibers (extrudates). Further, laminate theory accurately predicted the mechanical behaviour of thin-layered bidirectionally printed parts. The failure surface followed the orientation of extrudates in unidirectionally printed parts. The micro-CT analysis unveiled microstructural features, such as the orientation of SCFs along the printing direction, the presence of enclosed voids within the extrudates of thick-layered parts, and a reduction in maximum length of SCF in thin-layered parts; such features influenced the final mechanical behaviour of the printed parts.

ACS Style

Madhukar Somireddy; C.V. Singh; A. Czekanski. Mechanical behaviour of 3D printed composite parts with short carbon fiber reinforcements. Engineering Failure Analysis 2019, 107, 104232 .

AMA Style

Madhukar Somireddy, C.V. Singh, A. Czekanski. Mechanical behaviour of 3D printed composite parts with short carbon fiber reinforcements. Engineering Failure Analysis. 2019; 107 ():104232.

Chicago/Turabian Style

Madhukar Somireddy; C.V. Singh; A. Czekanski. 2019. "Mechanical behaviour of 3D printed composite parts with short carbon fiber reinforcements." Engineering Failure Analysis 107, no. : 104232.

Articles
Published: 17 September 2019 in Mechanics of Advanced Materials and Structures
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New higher-order models are developed for plane rods and beams based on the linear theory of nonlocal elasticity. The one-dimensional higher-order theory is based on two-dimensional equations of the nonlocal theory of elasticity and expansion of the equations of the nonlocal theory of elasticity into a Fourier series of Legendre polynomials in a thickness coordinate. The higher-order models developed are then used in the analysis of the tension–compression and transverse bending modes of nonlocal rod and beam vibration. The equation of motion for each mode is analyzed separately. Free and forced vibration are analyzed using the eigenfunction expansion and Navier’s analytic closed-form solution. An analysis and comparison with well-known theories is performed using computer algebra system MATHEMATICA. The proposed models consider nonlocal effects and can be used for vibration analysis of rods and beams at macroscales, microscales, and nanoscales.

ACS Style

A. Czekanski; V. V. Zozulya. Vibration analysis of nonlocal beams using higher-order theory and comparison with classical models. Mechanics of Advanced Materials and Structures 2019, 28, 1293 -1309.

AMA Style

A. Czekanski, V. V. Zozulya. Vibration analysis of nonlocal beams using higher-order theory and comparison with classical models. Mechanics of Advanced Materials and Structures. 2019; 28 (12):1293-1309.

Chicago/Turabian Style

A. Czekanski; V. V. Zozulya. 2019. "Vibration analysis of nonlocal beams using higher-order theory and comparison with classical models." Mechanics of Advanced Materials and Structures 28, no. 12: 1293-1309.

Journal article
Published: 01 September 2019 in Engineering Analysis with Boundary Elements
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Aleksander Czekanski; V.V. Zozulya. Solution of the 3-D elastodynamic contact problem for body with cracks using the BIEM and constrained optimization algorithm. Engineering Analysis with Boundary Elements 2019, 106, 599 -608.

AMA Style

Aleksander Czekanski, V.V. Zozulya. Solution of the 3-D elastodynamic contact problem for body with cracks using the BIEM and constrained optimization algorithm. Engineering Analysis with Boundary Elements. 2019; 106 ():599-608.

Chicago/Turabian Style

Aleksander Czekanski; V.V. Zozulya. 2019. "Solution of the 3-D elastodynamic contact problem for body with cracks using the BIEM and constrained optimization algorithm." Engineering Analysis with Boundary Elements 106, no. : 599-608.

Withdrawal
Published: 01 August 2019 in Materials Science and Engineering: A
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Joseph Agyapong; Aleksander Czekanski; Solomon Boakye–Yiadom. WITHDRAWN: Effect of heat treatment on microstructural evolution and properties of cemented carbides (WC-17Co) processed by selective laser sintering. Materials Science and Engineering: A 2019, 1 .

AMA Style

Joseph Agyapong, Aleksander Czekanski, Solomon Boakye–Yiadom. WITHDRAWN: Effect of heat treatment on microstructural evolution and properties of cemented carbides (WC-17Co) processed by selective laser sintering. Materials Science and Engineering: A. 2019; ():1.

Chicago/Turabian Style

Joseph Agyapong; Aleksander Czekanski; Solomon Boakye–Yiadom. 2019. "WITHDRAWN: Effect of heat treatment on microstructural evolution and properties of cemented carbides (WC-17Co) processed by selective laser sintering." Materials Science and Engineering: A , no. : 1.

Article
Published: 18 April 2019 in Experimental Mechanics
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A comprehensive understanding of process–structure–property relationship of 3D printed parts is currently limited. In the present study, we investigate the influence of the mesostructure on the overall mechanical behavior of the parts synthesized via fused filament fabrication. In particular, characterization of anisotropic behavior is carefully studied by performing mechanical testing on the printed parts. The printed parts are treated as laminates and are characterized using laminate mechanics. Test coupons of thick layered and also thin layered unidirectional as well as bidirectional laminates are printed with polymeric material for tensile and bending tests. Test results revealed that the process parameters govern the mesostructure and therefore the material behavior of the parts. Mechanical behavior of the bidirectional printed laminates is studied in detail. The properties are significantly influenced by the layer thickness and layup order of the printed parts. Mechanical behavior of the printed parts can be characterized using laminate theory. The effect of lamina layup and layer thickness on the flexural properties of the laminates is significant. Furthermore, the first ply failure theory is employed for the finite element failure analysis of the printed parts. The results provide insights in the relationship between mesostructure–mechanical properties of the printed parts.

ACS Style

Madhukar Somireddy; C. V. Singh; A. Czekanski. Analysis of the Material Behavior of 3D Printed Laminates Via FFF. Experimental Mechanics 2019, 59, 871 -881.

AMA Style

Madhukar Somireddy, C. V. Singh, A. Czekanski. Analysis of the Material Behavior of 3D Printed Laminates Via FFF. Experimental Mechanics. 2019; 59 (6):871-881.

Chicago/Turabian Style

Madhukar Somireddy; C. V. Singh; A. Czekanski. 2019. "Analysis of the Material Behavior of 3D Printed Laminates Via FFF." Experimental Mechanics 59, no. 6: 871-881.

Conference paper
Published: 03 December 2018 in Proceedings of the Canadian Engineering Education Association (CEEA)
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Project-based learning (PBL) has become a common practice engineering schools, often used in the context of design projects. Team based design projects allow the assessment of a broad range of graduate attributes, such as teamwork, communication, professionalism, ethics, project management, problem solving and design. Assessment of these skills is often qualitative, making assessment more difficult and varied than technical, quantitatively assessed subjects.Most often when we grade the outputs of team-based projects, we assess the team as a whole; assigning one grade to the entire team. Whether it is project reports, formative and summative, presentations or group assignments, team members share a mark. Tools such as peer and self-evaluations and contribution attestations are sometimes used to modify the marks assigned to individuals, relating the relative engagement of students within the team, but they do not clearly link the direct learning outcomes of individuals to specific attributes. Shared grading is done for several reasons. Logistically, it is significantly less workload to mark a single report per group, than to mark individual reports. Second, in professional work, the output of a team is what is important, and is the primary indicator of success. In an academic environment however, it is the specific learning outcomes of the individuals that we wish to assess.

ACS Style

Roger Carrick; Alex Czekanski. Assessing the Individual in Team Based Design Projects. Proceedings of the Canadian Engineering Education Association (CEEA) 2018, 1 .

AMA Style

Roger Carrick, Alex Czekanski. Assessing the Individual in Team Based Design Projects. Proceedings of the Canadian Engineering Education Association (CEEA). 2018; ():1.

Chicago/Turabian Style

Roger Carrick; Alex Czekanski. 2018. "Assessing the Individual in Team Based Design Projects." Proceedings of the Canadian Engineering Education Association (CEEA) , no. : 1.

Original article
Published: 31 October 2018 in Mechanics of Advanced Materials and Structures
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New theory of higher order for functionally graded (FG) shells, which is based on the expansion of the three-dimensional (3D) equations of elasticity for functionally graded materials (FGMs) into Legendre’s polynomials series is developed here. The stress and strain tensors, the displacement, traction and body force vectors of the 3D equations of elasticity, are expanded into Legendre’s polynomials series in terms of in the thickness coordinate. The mechanical parameters that describe the functionally graded material properties are also represented in the form of Legendre’s polynomials series expansion. As result the equations of the 3D elasticity are turned into the infinite number of two-dimensional (2D) equations for the Legendre’s polynomials series expansion coefficients. Considering finite number of the Legendre’s polynomials series coefficients and substituting kinematic relations into generalized Hooke’s law and the obtained result into the equations of motion the differential equations of motion the equations of motion in form of displacements have been obtained. The first order equations for the FG axisymmetric cylindrical plate and spherical shell are considered in more details. Corresponding boundary-value problems are solved using the finite element method (FEM) implemented in the MATEMATICA software. The numerical results are presented and discussed.

ACS Style

A. Czekanski; V. V. Zozulya. A higher order theory for functionally graded shells. Mechanics of Advanced Materials and Structures 2018, 27, 876 -893.

AMA Style

A. Czekanski, V. V. Zozulya. A higher order theory for functionally graded shells. Mechanics of Advanced Materials and Structures. 2018; 27 (11):876-893.

Chicago/Turabian Style

A. Czekanski; V. V. Zozulya. 2018. "A higher order theory for functionally graded shells." Mechanics of Advanced Materials and Structures 27, no. 11: 876-893.

Journal article
Published: 12 August 2018 in Engineering Analysis with Boundary Elements
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ACS Style

A. Czekanski; V.V. Zozulya. Comparative study of time and frequency domain approaches in contact problem for the I-mode crack under harmonic loading. Engineering Analysis with Boundary Elements 2018, 95, 200 -214.

AMA Style

A. Czekanski, V.V. Zozulya. Comparative study of time and frequency domain approaches in contact problem for the I-mode crack under harmonic loading. Engineering Analysis with Boundary Elements. 2018; 95 ():200-214.

Chicago/Turabian Style

A. Czekanski; V.V. Zozulya. 2018. "Comparative study of time and frequency domain approaches in contact problem for the I-mode crack under harmonic loading." Engineering Analysis with Boundary Elements 95, no. : 200-214.

Journal article
Published: 14 July 2018 in Journal of Manufacturing and Materials Processing
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A low-cost parametric finite element thermal model is proposed to study the impact of the initial powder condition, such as diameter and packing density, on effective thermal conductivity as well as the impact of the laser power input on the final temperature distributions during selective laser melting (SLM). Stainless steel 304L is the material used, since it is not yet commercially available in SLM equipment and our main goal was to show the capabilities of the finite element method in the evaluation of power input in the process. The results from our sensitivity analysis showed that packing density has a greater impact on the final temperature distributions compared with powder diameter variance. However, overall the thermal conductivity of the powder only showed significant effects below the melting point, otherwise the thermal conductivity no longer affected the temperature distributions. Among the three different power inputs analyzed, the temperature profile demonstrated that power inputs of 100 and 200 W are recommended when printing SS-304L rather than 400 W, which generates too high temperature in the powder bed, a non-favorable behavior that can induce high residual stresses and material evaporation.

ACS Style

Diego A De Moraes; Aleksander Czekanski; Diego De Moraes. Parametric Thermal FE Analysis on the Laser Power Input and Powder Effective Thermal Conductivity during Selective Laser Melting of SS304L. Journal of Manufacturing and Materials Processing 2018, 2, 47 .

AMA Style

Diego A De Moraes, Aleksander Czekanski, Diego De Moraes. Parametric Thermal FE Analysis on the Laser Power Input and Powder Effective Thermal Conductivity during Selective Laser Melting of SS304L. Journal of Manufacturing and Materials Processing. 2018; 2 (3):47.

Chicago/Turabian Style

Diego A De Moraes; Aleksander Czekanski; Diego De Moraes. 2018. "Parametric Thermal FE Analysis on the Laser Power Input and Powder Effective Thermal Conductivity during Selective Laser Melting of SS304L." Journal of Manufacturing and Materials Processing 2, no. 3: 47.