This study focused on the analysis of the mechanical properties of thin-walled specimens fabricated by fused deposition modelling (FDM). Two materials were considered, i.e., polylactide (PLA) and polylactide with carbon fiber (PLA-CF). The article describes how the specimens with different thicknesses and printing orientations were designed, printed, measured to assess their geometric and dimensional accuracy, subjected to tensile testing, and examined using scanning electron microscopy. The data provided here can be used for further research aimed at improving filament deposition and modifying the base material by combining it with different components, for example carbon fiber. The investigations revealed that the properties of thin-walled elements produced by FDM varied significantly depending on the thickness. So far, this problem has not been investigated extensively. Research by analyzing the key parameter, which is the direction of printing that is important for thin-walled models, provides a lot of new information for designers and technologists and opens the way to further extended scientific research in the field of the strength analysis of thin-walled models produced by 3D printing, which is very applicable to structure optimization in the era of the industrial revolution 4.0 and progress in the LEAN manufacturing process.

Laser technologies for fast prototyping using metal powder-based materials allow for faster production of prototype constructions actually used in the tooling industry. This paper presents the results of measurements on the surface texture of flat samples and the surface texture of a prototype of a reduced-mass lathe chuck, made with the additive technology—powder bed fusion. The paper presents an analysis of the impact of samples’ orientation on the building platform on the surface geometrical texture parameters (two-dimensional roughness profile parameters (Ra, Rz, Rv, and so on) and spatial parameters (Sa, Sz, and so on). The research results showed that the printing orientation has a very large impact on the quality of the surface texture and that it is possible to set digital models on the building platform (parallel—0° to the building platform plane), allowing for manufacturing models with low roughness parameters. This investigation is especially important for the design and 3D printing of microelectromechanical systems (MEMS) models, where surface texture quality and printable resolution are still a large problem.

The paper describes the mechanical properties, determined on the basis of a tensile strength test of a composite material based on glass-fiber reinforced polyamide and obtained by Selective Laser Sintering—SLS. The material used is PA 3200 GF. Thin walled samples with non-standard nominal thicknesses of 1, 1.4 and 1.8 mm, manufactured in three printing directions X, Y and Z, were used. The description included the impact of printing direction on the geometry of the obtained samples and tensile strength as well as the dependency of tensile strength on the sample thickness. The results can be useful for design engineers and process engineers designing thin-walled components produced with SLS. Thin samples were obtained with a considerable deviation spread of the actual dimension from the nominal one. It was found that the tensile strength of thin samples is much lower than those of standard cross-sections, which should be taken into account in the design of thin-walled elements.

The paper presents the results of tests of surface waviness of samples made in the powder bed fusion technology. The models were built using 316L steel-based powder with high corrosion resistance. The samples were placed on the construction platform at three different angles (0°, 45°, 90°) in XZ plane. Then, using an optical profilometer, the parameters of the geometric structure of the surface of the primary profile and the separated waviness component were measured. Analyzing the results of the test, it can be stated that the orientation of model arrangement has an impact on the quality of the technological surface texture, what has significance impact on wear processes and mechanical properties.

Details var a2a_config = a2a_config || {}; a2a_config.onclick = 1; a2a_config.locale = "pl"; a2a_config.color_main = "D7E5ED"; a2a_config.color_border = "9D9D9D"; a2a_config.color_link_text = "ffffff"; a2a_config.color_link_text_hover = "ffffff"; a2a_config.color_bg = "d9d9d9"; a2a_config.icon_color = "#4e4e4e"; a2a_config.exclude_services = ["dihitt", "delicious", "whatsapp", "dzone", "sms", "stumpedia", "viber", "yahoo_messenger", "google_plus"]; Details PDF BIBTEX RIS Title An Analysis Of Tensile Test Results to Assess the Innovation Risk for an Additive Manufacturing Technology Journal title Metrology and Measurement Systems Yearbook 2015 Volume vol. 22 Issue No 1 Authors Adamczak, Stanisław ; Bochnia, Jerzy ; Kaczmarska, Bożena Keywords Failure Mode and Effects Analysis ; static tensile test ; measurement uncertainty Divisions of PAS Nauki Techniczne Coverage 127-138 Publisher Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation Date 2015[2015.01.01 AD - 2015.12.31 AD] Type Artykuły / Articles Identifier DOI: 10.1515/mms-2015-0015 ; ISSN 2080-9050, e-ISSN 2300-1941 Source Metrology and Measurement Systems; 2015; vol. 22; No 1; 127-138 References Janusiewicz (2011), Determining the theoretical method error during an on - machine roundness measurement, Measurement, 44, 9, doi.org/10.1016/j.measurement.2011.07.013 ; Campbell (2012), Additive manufacturing : rapid prototyping comes of age, Rapid Prototyping Journal, 18, 255, doi.org/10.1108/13552541211231563 ; Radziszewski (2009), Application of a genetic - fuzzy system to diesel engine pressure modeling The, International Journal of Advanced Manufacturing Technology, 46, 1, doi.org/10.1007/s00170-009-2080-1 ; Kęsy (2010), Mechanical properties of parts produced by using polymer jetting technology Archives of Civil and Mechanical, Engineering, 37. ; Hiller (2012), A computer simulation platform for the estimation of measurement uncertainties in dimensional X - ray computed tomography, Measurement, 45, 2166, doi.org/10.1016/j.measurement.2012.05.030 ; Hamrol (2005), Quality management with examples Wydawnictwo Naukowe PWN, Warszawa, 327. ; Cedro (2011), Determining of Signal Derivatives in Identification Problems - FIR Differential Filters, Acta Montanistica Slovaca, 16, 1. ; Su (2012), An improved method for risk evaluation in failure modes and effects analysis of aircraft engine rotor blades, Engineering Failure Analysis, 26, 164, doi.org/10.1016/j.engfailanal.2012.07.009 ; Chen (2013), A modified failure mode and effects analysis method for supplier selection problems in the supply chain risk environment : A case study Computers and, Industrial Engineering, 66, 634, doi.org/10.1016/j.cie.2013.09.018 ; Kolich (2014), Using failure mode and effects analysis to design a comfortable automotive driver seat, Applied Ergonomic, 45, 1087, doi.org/10.1016/j.apergo.2014.01.007 ; Asiltürk (2012), Multi response optimisation of CNC turning parameters via Taguchi method - based response surface analysis, Measurement, 45, 785, doi.org/10.1016/j.measurement.2011.12.004 ; Puebla (2012), Effects of environmental conditions aging and build orientations on the mechanical properties of ASTM type I specimens manufactured via stereolithography, Rapid Prototyping Journal, 18, 374, doi.org/10.1108/13552541211250373 ; Inspekt (2011), Mini Universal testing machine Inspekt mini kN & Peschke MPT GmbH, Hegewald. ; Sen (2005), Analysis of hole quality characteristics in the electro jet drilling process of Machine Tools, International Journal Manufacture, 45, 1706. ; Wirandi (2006), Uncertainty and traceable calibration - how modern measurement concepts improve product quality in process industry, Measurement, 39, 612, doi.org/10.1016/j.measurement.2006.01.008 ; Chockalingam (2006), Influence of layer thickness on mechanical properties in stereolithography, Rapid Prototyping Journal, 12, 106, doi.org/10.1108/13552540610652456

Purpose: – This paper aims to investigate the suitability of additive manufacturing to produce O-ring seals. Design/methodology/approach: – The O-rings were made by the PolyJet-Matrix technology using four different digital materials and then tested for relaxation properties under static and dynamic (sliding) conditions. The approximation of the relaxation curves involved modelling with a Prony series. Findings: – The PolyJet-Matrix technology offers new opportunities to model elastomeric elements, with examples being the O-rings produced and tested for their relaxation properties. Describing the behaviour of the particular materials fabricated with this technology by using relaxation functions will extend the knowledge base on digital materials. Research limitations/implications: – The four types of photopolymers used in the experiment differed in viscoelastic properties. The analysis of the stress relaxation of the O-ring models was performed at four different step displacements of the loading element. Practical implications: – The test results may be useful for the design of O-ring seals made of new elastomeric materials. The relaxation properties of the O-rings made of such materials can be applied to analyse the dynamics of seals, for instance, face seals. Originality/value: – The originality of the work lies in the use of digital materials to design and produce elastomeric elements with different relaxation properties, which was confirmed by the test results. This paper presents results of a relaxation analysis for a ring model and the material that the ring is made of. It also discusses how 3D printing and digital materials can be applied in practice.