This page has only limited features, please log in for full access.

Unclaimed
Zhenqiang Zhao
School of Science, Harbin Institute of Technology, Shenzhen, Guangdong 518055, China

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 27 April 2021 in Thin-Walled Structures
Reads 0
Downloads 0

The anisotropy and heterogeneity of carbon fiber–reinforced polymer (CFRP) composites contribute to their complex failure characteristics, posing challenges for predicting their impact failure behavior. In this study, high-fidelity finite element models are established to predict the performance of laminated and woven composite panels impacted by a metallic projectile, with consideration of strain-rate effect and impact attitudes. The numerical models are experimentally validated and are applied to investigate the impact resistance of both composites under various impact conditions. The results indicate that the maximum ratio of delamination of laminated panel is about 0.4, which is greater than 0.2 of the woven panel. Woven panels can better withstand impact damage, while laminates are more prone to delamination under high-speed impacts loads.

ACS Style

Chunlin Du; Huanfang Wang; Zhenqiang Zhao; Lu Han; Chao Zhang. A comparison study on the impact failure behavior of laminate and woven composites with consideration of strain rate effect and impact attitude. Thin-Walled Structures 2021, 164, 107843 .

AMA Style

Chunlin Du, Huanfang Wang, Zhenqiang Zhao, Lu Han, Chao Zhang. A comparison study on the impact failure behavior of laminate and woven composites with consideration of strain rate effect and impact attitude. Thin-Walled Structures. 2021; 164 ():107843.

Chicago/Turabian Style

Chunlin Du; Huanfang Wang; Zhenqiang Zhao; Lu Han; Chao Zhang. 2021. "A comparison study on the impact failure behavior of laminate and woven composites with consideration of strain rate effect and impact attitude." Thin-Walled Structures 164, no. : 107843.

Journal article
Published: 14 April 2021 in Applied Mathematical Modelling
Reads 0
Downloads 0

In this paper, a micromechanics-based constitutive model is proposed for linear viscoelastic particle-reinforced composites with interphase based on the theoretical homogenization framework in the time domain that we recently proposed for viscoelastic composites. All the composite's phases (i.e., the matrix, particle and interphase) are considered as linear viscoelastic materials, whose constitutive responses are governed by the general Maxwell model. The interphase with varying viscoelastic property is approximated by the multiple homogenized layers. The constitutive model of the composites is multiplicatively decomposed as two parts: 1) the effective relaxation function characterizes the time-dependent behaviors, and 2) the referred elastic part refers to the long-term responses. The classical composite-sphere model and three-phase model are extended to derive the variables involved in the constitutive model for the bulk and shear behaviors, respectively. The comprehensive numerical simulations, including the effects of the number of interphase layer, interphase thickness, particle content and loading condition, are carried out to validate the proposed constitutive model. The results reveal that the constitutive model can predict well the viscoelastic behaviors of the particle-reinforced composites with interphase. The validated constitutive model is then applied to identify the viscoelastic properties of the interphase by fitting the predictive results and the experimental data of the “overall” composites. The results show the good consistency for the interphase properties between the theoretical identification and the experimental observation. The discussion of the interphase percolation is then carried out, and the findings demonstrate again that the constitutive model can also give good predictions under the percolation situation.

ACS Style

Yang Chen; Zhenqiang Zhao; Zaoyang Guo; Yulong Li. Micromechanical Model of Linear Viscoelastic Particle-Reinforced Composites with Interphase. Applied Mathematical Modelling 2021, 1 .

AMA Style

Yang Chen, Zhenqiang Zhao, Zaoyang Guo, Yulong Li. Micromechanical Model of Linear Viscoelastic Particle-Reinforced Composites with Interphase. Applied Mathematical Modelling. 2021; ():1.

Chicago/Turabian Style

Yang Chen; Zhenqiang Zhao; Zaoyang Guo; Yulong Li. 2021. "Micromechanical Model of Linear Viscoelastic Particle-Reinforced Composites with Interphase." Applied Mathematical Modelling , no. : 1.

Journal article
Published: 01 November 2019 in Polymers
Reads 0
Downloads 0

The impact resistance of fiber-reinforced polymer composites is a critical concern for structure design in aerospace applications. In this work, experiments were conducted to evaluate the impact performance of four types of composite panels, using a gas-gun test system. Computational efficient finite element models were developed to model the high-speed ballistic impact behavior of laminate and textile composites. The models were first validated by comparing the critical impact threshold and the failure patterns against experimental results. The damage progression and energy evolution behavior were combined to analyze the impact failure process of the composite panels. Numerical parametric studies were designed to investigate the sensitivity of impact resistance against impact attitude, including impact deflection angles and projectile deflection angles, which provide a comprehensive understanding of the damage tolerance of the composite panels. The numerical results elaborate the different impact resistances for laminate and textile composites and their different sensitivities to deflection angles.

ACS Style

Jun Xing; Chunlin Du; Xin He; Zhenqiang Zhao; Chao Zhang; Yulong Li; Xing; Du; He; Zhao; Li. Finite Element Study on the Impact Resistance of Laminated and Textile Composites. Polymers 2019, 11, 1798 .

AMA Style

Jun Xing, Chunlin Du, Xin He, Zhenqiang Zhao, Chao Zhang, Yulong Li, Xing, Du, He, Zhao, Li. Finite Element Study on the Impact Resistance of Laminated and Textile Composites. Polymers. 2019; 11 (11):1798.

Chicago/Turabian Style

Jun Xing; Chunlin Du; Xin He; Zhenqiang Zhao; Chao Zhang; Yulong Li; Xing; Du; He; Zhao; Li. 2019. "Finite Element Study on the Impact Resistance of Laminated and Textile Composites." Polymers 11, no. 11: 1798.

Journal article
Published: 12 March 2019 in Materials
Reads 0
Downloads 0

The mechanical characterization of textile composites is a challenging task, due to their nonuniform deformation and complicated failure phenomena. This article introduces a three-dimensional mesoscale finite element model to investigate the progressive damage behavior of a notched single-layer triaxially-braided composite subjected to axial tension. The damage initiation and propagation in fiber bundles are simulated using three-dimensional failure criteria and damage evolution law. A traction⁻separation law has been applied to predict the interfacial damage of fiber bundles. The proposed model is correlated and validated by the experimentally measured full field strain distributions and effective strength of the notched specimen. The progressive damage behavior of the fiber bundles is studied by examining the damage and stress contours at different loading stages. Parametric numerical studies are conducted to explore the role of modeling parameters and geometric characteristics on the internal damage behavior and global measured properties of the notched specimen. Moreover, the correlations of damage behavior, global stress⁻strain response, and the efficiency of the notched specimen are discussed in detail. The results of this paper deliver a throughout understanding of the damage behavior of braided composites and can help the specimen design of textile composites.

ACS Style

Zhenqiang Zhao; Haoyuan Dang; Jun Xing; Xi Li; Chao Zhang; Wieslaw K. Binienda; Yulong Li. Progressive Failure Simulation of Notched Tensile Specimen for Triaxially-Braided Composites. Materials 2019, 12, 833 .

AMA Style

Zhenqiang Zhao, Haoyuan Dang, Jun Xing, Xi Li, Chao Zhang, Wieslaw K. Binienda, Yulong Li. Progressive Failure Simulation of Notched Tensile Specimen for Triaxially-Braided Composites. Materials. 2019; 12 (5):833.

Chicago/Turabian Style

Zhenqiang Zhao; Haoyuan Dang; Jun Xing; Xi Li; Chao Zhang; Wieslaw K. Binienda; Yulong Li. 2019. "Progressive Failure Simulation of Notched Tensile Specimen for Triaxially-Braided Composites." Materials 12, no. 5: 833.

Journal article
Published: 25 February 2019 in International Journal of Mechanical Sciences
Reads 0
Downloads 0

This paper investigates experimentally the dynamic compressive behavior of short fiber reinforced polyetheretherketone (PEEK) composites, with a specific focus on the effect of strain rate, fiber reinforcement and fabrication process. Hopkinson compressive bar system is employed to test the specimens with strain rate varies from 800-2500 /s. Ultra-high speed camera system is used to record the deformation and failure process. Scanning electron microscopy (SEM) is introduced to examine the fracture surface, and to analyze the failure mechanism and its rate dependency. Four different types of PEEK composites are studied and compared to investigate the sensitivity of failure mechanism to fiber reinforcement and fabrication method (injection and extrusion). The results indicate that the ultimate stresses of PEEK and PEEK composites present different levels of sensitivity against strain rates, while the failure strain of PEEK composites decrease with the increase of strain rate. The strain rate dependency is associated with the increase of interface toughness under higher strain rate. The experimental results also identify the presence of phase transformation for matrix material during the high-rate compressive failure. The sensitivity of failure behavior against fabrication process is found to associate with the difference of fiber distributions.

ACS Style

Chunyang Chen; Chao Zhang; Zhenqiang Zhao; Yanpei Wang; Shing-Chung Wong; Yulong Li. Effect of fiber reinforcement and fabrication process on the dynamic compressive behavior of PEEK composites. International Journal of Mechanical Sciences 2019, 155, 170 -177.

AMA Style

Chunyang Chen, Chao Zhang, Zhenqiang Zhao, Yanpei Wang, Shing-Chung Wong, Yulong Li. Effect of fiber reinforcement and fabrication process on the dynamic compressive behavior of PEEK composites. International Journal of Mechanical Sciences. 2019; 155 ():170-177.

Chicago/Turabian Style

Chunyang Chen; Chao Zhang; Zhenqiang Zhao; Yanpei Wang; Shing-Chung Wong; Yulong Li. 2019. "Effect of fiber reinforcement and fabrication process on the dynamic compressive behavior of PEEK composites." International Journal of Mechanical Sciences 155, no. : 170-177.

Journal article
Published: 14 January 2019 in Composites Science and Technology
Reads 0
Downloads 0

The complex failure behavior of triaxially braided composites under in-plane transverse load conditions is investigated through quasi-static experiments and meso-scale finite element (FE) simulations. A three-dimensional (3D) progressive damage model for the fiber tows is integrated with a cohesive model for the interfaces to simulate the initiation, accumulation and propagation behavior of damage in braided composites. The meso-scale FE model predicts well the global stress–strain responses, and the predicted strain distribution contours compare well with the experimental results captured by digital image correlation. The fully validated FE model is subsequently adopted to investigate the failure mechanism of a triaxially braided composite under transverse tensile and compressive loads. Numerical parametric studies are implemented to evaluate the effect of interface strength on the effective properties of the material and to identify the appropriate definition of through-thickness boundary conditions in the meso-FE simulation. The model presented in this study shows fairly good accuracy in predicting the failure behavior of a triaxially braided composite under different loadings, and it can be further employed to study the mechanical performance of similar materials.

ACS Style

Zhenqiang Zhao; Peng Liu; Chunyang Chen; Chao Zhang; Yulong Li. Modeling the transverse tensile and compressive failure behavior of triaxially braided composites. Composites Science and Technology 2019, 172, 96 -107.

AMA Style

Zhenqiang Zhao, Peng Liu, Chunyang Chen, Chao Zhang, Yulong Li. Modeling the transverse tensile and compressive failure behavior of triaxially braided composites. Composites Science and Technology. 2019; 172 ():96-107.

Chicago/Turabian Style

Zhenqiang Zhao; Peng Liu; Chunyang Chen; Chao Zhang; Yulong Li. 2019. "Modeling the transverse tensile and compressive failure behavior of triaxially braided composites." Composites Science and Technology 172, no. : 96-107.

Proceedings article
Published: 07 November 2018 in American Society for Composites 2018
Reads 0
Downloads 0

The failure mechanisms of triaxially braided composite under in-plane tensile and compression loads are investigated in this study. The testing specimens are cut from a typical 8-layer 0°/±60° triaxially braided composite panel which is fabricated with Toray T700 carbon fiber and a toughened epoxy resin 3266. The quasi-static tension and compression loads that parallel or vertical to the 0° fibers are applied by using a Hydraulic testing machine, respectively. The Digital Image Correlation (DIC) technology is implemented to measure the displacement and strain fields of gauge section for both the tensile and compression tests. As a result, the failure mechanisms under different load conditions are elaborated contrastively.

ACS Style

Zhenqiang Zhao; Chao Zhang; Yulong Li. Tensile and Compressive Failure Behaviors of Triaxially Braided Composite. American Society for Composites 2018 2018, 1 .

AMA Style

Zhenqiang Zhao, Chao Zhang, Yulong Li. Tensile and Compressive Failure Behaviors of Triaxially Braided Composite. American Society for Composites 2018. 2018; ():1.

Chicago/Turabian Style

Zhenqiang Zhao; Chao Zhang; Yulong Li. 2018. "Tensile and Compressive Failure Behaviors of Triaxially Braided Composite." American Society for Composites 2018 , no. : 1.

Conference paper
Published: 07 November 2018 in American Society for Composites 2018
Reads 0
Downloads 0

The dynamic failure behaviors of composite T-joints were investigated through conducting the simulated hail ice (SHI) impact experiment. The SHIs were made in laboratory environment and fired by using a gas gun. Crack onset and propagation in the deltoid of CFRP T-joints were captured by using a high-speed camera. The quasistatic tensile experiment was also carried out and the digital image correlation (DIC) technique was adopted to capture the failure process of CFRP T-joints. The different failure mechanism of CFRP T-joints under tensile and impact loadings were comparatively discussed in this study and the deltoid zone was found to play a key role in the damage process under impact loading.

ACS Style

Huawen Zhang; Huifang Liu; Zhenqiang Zhao; Yulong Li; Chao Zhang. Experimental Investigation Into the Failure of CFRP T-joints Under Ice Impact and Quasi-static Loadings. American Society for Composites 2018 2018, 1 .

AMA Style

Huawen Zhang, Huifang Liu, Zhenqiang Zhao, Yulong Li, Chao Zhang. Experimental Investigation Into the Failure of CFRP T-joints Under Ice Impact and Quasi-static Loadings. American Society for Composites 2018. 2018; ():1.

Chicago/Turabian Style

Huawen Zhang; Huifang Liu; Zhenqiang Zhao; Yulong Li; Chao Zhang. 2018. "Experimental Investigation Into the Failure of CFRP T-joints Under Ice Impact and Quasi-static Loadings." American Society for Composites 2018 , no. : 1.

Proceedings article
Published: 07 November 2018 in American Society for Composites 2018
Reads 0
Downloads 0

In this paper, a new analytical model is developed to predict the strength of two-dimensional triaxial braided composite (2DTBC). According to the concept of subcell model, a representative unit cell of braided composite is divided into four subcells, each of which is approximated as a stack of unidirectional composite plies. In order to investigate the interaction of braided angle and effective properties, it is assumed that the unit cell models of different braid angles have the same fiber volume fraction and the same thickness. Then, explicit equations can be obtained to describe the geometric parameters and to quantify the specific dimensions of subcell components based on the manufacture provided properties and microscopic image analysis of realistic specimens. Micro-mechanical models are applied to estimate the elastic and strength properties of unidirectional plies. Classical Laminate theory and Parallel and Series Bridge models are implemented to connect the strain and stress responses of subcell components and effective responses of the unit cell. Hoffman and Hashin failure criteria are used to examine the onset of failure for each subcell component, which can then predict the progressive failure process and global stress-strain response of the unit cell. The developed analytical model will then be utilized to predict the tensile strength (axial tension and transverse tension) of a +60°/0°/-60° 2DTBC and validated against experiments. Finally, the validated model will be used to study strength properties for 2DTBC of different braided angles. The results can provide insights for the design and optimization of composite structures with similar braided architecture.

ACS Style

Haoyuan Dang; Zhenqiang Zhao; Yulong Li; Chao Zhang. Analytical Prediction of Tensile Strength Prediction for Two-Dimensional Triaxially Braided Composite. American Society for Composites 2018 2018, 1 .

AMA Style

Haoyuan Dang, Zhenqiang Zhao, Yulong Li, Chao Zhang. Analytical Prediction of Tensile Strength Prediction for Two-Dimensional Triaxially Braided Composite. American Society for Composites 2018. 2018; ():1.

Chicago/Turabian Style

Haoyuan Dang; Zhenqiang Zhao; Yulong Li; Chao Zhang. 2018. "Analytical Prediction of Tensile Strength Prediction for Two-Dimensional Triaxially Braided Composite." American Society for Composites 2018 , no. : 1.

Journal article
Published: 01 July 2018 in Composites Part A: Applied Science and Manufacturing
Reads 0
Downloads 0

A multi-scale simulation framework based on finite element method is developed to model the impact failure behavior of triaxially braided composite. The model integrates micromechanical model, meso-mechanical model and macro subcell model for the purpose of determining effective properties of fiber tows, estimating effective properties of subcell components, and simulating impact failure behavior of a braided composite structure, respectively. The meso-mechanical model compares excellently with experiments for mechanical behavior of both single-layer and six-layer specimens under quasi-static loading conditions. A new meso-macro homogenization approach is proposed to estimate effective properties of subcell components with consideration of geometry continuity effect. The subcell model is validated against experiments and utilized to simulate the high-speed impact behavior of a composite panel. The results of the subcell impact model compare well with experimental failure phenomena. The presented multi-scale modeling approach demonstrates its feasibility for impact analysis and design of braided composite structures.

ACS Style

Zhenqiang Zhao; Haoyuan Dang; Chao Zhang; Gun Jin Yun; Yulong Li. A multi-scale modeling framework for impact damage simulation of triaxially braided composites. Composites Part A: Applied Science and Manufacturing 2018, 110, 113 -125.

AMA Style

Zhenqiang Zhao, Haoyuan Dang, Chao Zhang, Gun Jin Yun, Yulong Li. A multi-scale modeling framework for impact damage simulation of triaxially braided composites. Composites Part A: Applied Science and Manufacturing. 2018; 110 ():113-125.

Chicago/Turabian Style

Zhenqiang Zhao; Haoyuan Dang; Chao Zhang; Gun Jin Yun; Yulong Li. 2018. "A multi-scale modeling framework for impact damage simulation of triaxially braided composites." Composites Part A: Applied Science and Manufacturing 110, no. : 113-125.

Journal article
Published: 01 May 2013 in Journal of Aircraft
Reads 0
Downloads 0

Crack paths in friction stir-welded 2198-T8 SE(T) plates with pad-up are investigated. Fatigue tests are performed with and without a friction stir weld in a range of samples, and crack paths and fatigue crack growth rates are compared. The effects of the weld on the damage tolerance of samples are studied. A hole is drilled through the specimen to study its effects on the crack trajectory. It is shown that the crack growth rate is slower with a weld than without a weld. The position of hole can change crack path and crack trajectories. A program is developed to input the residual stress distribution into an ABAQUS finite element model, and the crack paths are predicted to understand the effects of the weld. These predictions are compared with experimental data gathered on crack deviation behavior. The predictions agree well with the experimental findings.

ACS Style

Yu E. Ma; Bao Qi Liu; Zhenqiang Zhao. Crack Paths in a Friction Stir-Welded Pad-Up for Fuselage Applications. Journal of Aircraft 2013, 50, 879 -885.

AMA Style

Yu E. Ma, Bao Qi Liu, Zhenqiang Zhao. Crack Paths in a Friction Stir-Welded Pad-Up for Fuselage Applications. Journal of Aircraft. 2013; 50 (3):879-885.

Chicago/Turabian Style

Yu E. Ma; Bao Qi Liu; Zhenqiang Zhao. 2013. "Crack Paths in a Friction Stir-Welded Pad-Up for Fuselage Applications." Journal of Aircraft 50, no. 3: 879-885.

Journal article
Published: 25 January 2013 in Materials Science and Engineering: A
Reads 0
Downloads 0

A 2.0 mm thick Al–Li alloy 2198-T8 plate is welded by friction stir welding in this work. Four dog-bone type samples are designed to use and measure stress–strain curves and mechanical properties. M(T) samples with transverse weld in the center are designed. Fatigue tests under different R ratio loads are performed on the welded samples with crack growing in the welded nugget and parent material samples. Fatigue crack growth rates in these welded nuggets are obtained and compared. It is shown that there is no peculiar yielding process in the stress–strain curve of the welded nugget compared with the parent material. Yield strength and tensile strength have a “U” shape through the weld zone and a lower value in the weld zone while the elongation is in reverse. Unlike the parent material, fatigue crack growth rates in the welded nugget are not sensitive to R ratios. Based on Kres, finite element models are built and the crack closure method is used to calculate the effect of residual stress. Redistributions of residual stress with crack growth are taken into account. Fracture surfaces are investigated to summarize the fracture feature of the welded nugget under fatigue load.

ACS Style

Yu E Ma; Zhenqiang Zhao; Baoqi Liu; Wenya Li. Mechanical properties and fatigue crack growth rates in friction stir welded nugget of 2198-T8 Al–Li alloy joints. Materials Science and Engineering: A 2013, 569, 41 -47.

AMA Style

Yu E Ma, Zhenqiang Zhao, Baoqi Liu, Wenya Li. Mechanical properties and fatigue crack growth rates in friction stir welded nugget of 2198-T8 Al–Li alloy joints. Materials Science and Engineering: A. 2013; 569 ():41-47.

Chicago/Turabian Style

Yu E Ma; Zhenqiang Zhao; Baoqi Liu; Wenya Li. 2013. "Mechanical properties and fatigue crack growth rates in friction stir welded nugget of 2198-T8 Al–Li alloy joints." Materials Science and Engineering: A 569, no. : 41-47.

Journal article
Published: 01 November 2012 in Key Engineering Materials
Reads 0
Downloads 0

Before friction stir welded integral panels are used in main aircraft structure, the corrosion behavior of welded joint need to be studied in detail. 2024 T3 samples were designed and welded by friction stir welding; the microstructure crossing the weld zone was observed by scanning electron microscopy (SEM), the feature of different zones (base material, thermo-mechanical affected zone, nugget) was seen; the corrosion testing in NaCl smoking box was carried out, and microstructure was observed after corrosion, localized corrosion predominantly occurs in the thermo-mechanical affected zone.

ACS Style

Yu E Ma; Zhenqiang Zhao. Investigation on the Corrosion Effect of Friction Stir Welded AA2024 T3 Aluminum Alloy Joints. Key Engineering Materials 2012, 525-526, 129 -132.

AMA Style

Yu E Ma, Zhenqiang Zhao. Investigation on the Corrosion Effect of Friction Stir Welded AA2024 T3 Aluminum Alloy Joints. Key Engineering Materials. 2012; 525-526 ():129-132.

Chicago/Turabian Style

Yu E Ma; Zhenqiang Zhao. 2012. "Investigation on the Corrosion Effect of Friction Stir Welded AA2024 T3 Aluminum Alloy Joints." Key Engineering Materials 525-526, no. : 129-132.

Journal article
Published: 01 November 2011 in Applied Mechanics and Materials
Reads 0
Downloads 0

Al-Li alloy 2198-T8 was used in the fuselage application. Integral fuselage panels were joined by double friction stir welds. Fatigue tests were conducted in the R=0.1. Notch was made between two welds. Residual stresses were measured and analyzed in the test samples with double welds. Cracks grew from the centre of two welds and across the two welds were observed, and crack growth rates were measured and compared with parent material. It is shown that crack growth rates are lower between double welds, and it is close to parent material after cross the two welds. The virtual crack closure technique (VCCT) method was used to calculate stress intensity factor from residual stress (Kres) in aim to explain the experimental findings.

ACS Style

Yu E Ma; Bao Qi Liu; Zhen Qiang Zhao. Damage Tolerance Properties of 2198-T8 Integral Fuselage Panel between Double Friction Stir Weld Joints. Applied Mechanics and Materials 2011, 138-139, 651 -656.

AMA Style

Yu E Ma, Bao Qi Liu, Zhen Qiang Zhao. Damage Tolerance Properties of 2198-T8 Integral Fuselage Panel between Double Friction Stir Weld Joints. Applied Mechanics and Materials. 2011; 138-139 ():651-656.

Chicago/Turabian Style

Yu E Ma; Bao Qi Liu; Zhen Qiang Zhao. 2011. "Damage Tolerance Properties of 2198-T8 Integral Fuselage Panel between Double Friction Stir Weld Joints." Applied Mechanics and Materials 138-139, no. : 651-656.