Measurements of the mechanical response of unidirectional 3D-printed PLA

Abstract Fully dense PLA blocks were manufactured by 3D-printing, depositing a polymer filament in a single direction via the fusion deposition method (FDM). Specimens were cut from printed blocks using conventional machining and were used to perform tension, compression and fracture experiments along different material directions. The elasto-plastic material response was found to be orthotropic and characterised by a strong tension-compression asymmetry; the material was tougher when loaded in the extrusion direction than in the transverse direction. The response of the unidirectional, 3D-printed material was compared to that of homogeneous injection-moulded PLA, showing that manufacturing by 3D-printing improves toughness; the effects of an annealing thermal cycle on the molecular structure and the mechanical response of the material were assessed.

[1]  A. M. El-hadi,et al.  Correlation between degree of crystallinity, morphology, glass temperature, mechanical properties and biodegradation of poly (3-hydroxyalkanoate) PHAs and their blends , 2002 .

[2]  Agnes Bagsik,et al.  MECHANICAL PROPERTIES OF FUSED DEPOSITION MODELING PARTS MANUFACTURED WITH ULTEM*9085 , 2011 .

[3]  O. Es-Said,et al.  Effect of Layer Orientation on Mechanical Properties of Rapid Prototyped Samples , 2000 .

[4]  Selçuk Güçeri,et al.  Mechanical characterization of parts fabricated using fused deposition modeling , 2003 .

[5]  S. Vel,et al.  Multi-objective optimization of functionally graded materials with temperature-dependent material properties , 2007 .

[6]  Guanglei Xiong,et al.  Current progress in 3D printing for cardiovascular tissue engineering , 2015, Biomedical materials.

[7]  W. Cantwell,et al.  The Influence of Cooling Rate on the Fracture Properties of a Thermoplastic-Based Fibre-Metal Laminate , 2002 .

[8]  Liang Hou,et al.  Additive manufacturing and its societal impact: a literature review , 2013 .

[9]  J. Jun,et al.  Study of Thermoplastic PLA Foam Extrusion , 2008 .

[10]  A. F. Silva,et al.  Fused deposition modeling with polypropylene , 2015 .

[11]  Joshua M. Pearce,et al.  Mechanical properties of components fabricated with open-source 3-D printers under realistic environmental conditions , 2014 .

[12]  Ross R. Muth,et al.  Biodegradable polymers for use in surgery—polyglycolic/poly(actic acid) homo- and copolymers: 1 , 1979 .

[13]  Charlotte K. Williams,et al.  Bacterial cellulose nanopaper as reinforcement for polylactide composites: renewable thermoplastic NanoPaPreg. , 2014, Macromolecular rapid communications.

[14]  J. Whitney,et al.  EXPERIMENTAL METHODS FOR DETERMINING SHEAR MODULUS OF FIBER REINFORCED COMPOSITE MATERIALS , 1965 .

[15]  Ján Slota,et al.  Influence of printing conditions on structure in FDM prototypes , 2013 .

[16]  Ali P. Gordon,et al.  Mechanical Property Optimization of FDM PLA in Shear with Multiple Objectives , 2015, JOM.

[17]  Dayakar Penumadu,et al.  Structure–mechanical property relationship in fused deposition modelling , 2015 .

[18]  Alexander A. Pasko,et al.  Virtual Sculpting and 3D Printing for Young People with Disabilities , 2016, IEEE Computer Graphics and Applications.

[19]  Todd Letcher,et al.  Material Property Testing of 3D-Printed Specimen in PLA on an Entry-Level 3D Printer , 2014 .

[20]  R. Hill.  A theory of the yielding and plastic flow of anisotropic metals , 1948, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[21]  Caroline Sunyong Lee,et al.  Measurement of anisotropic compressive strength of rapid prototyping parts , 2007 .

[22]  Mehrdad Haghi,et al.  Deposition direction-dependent failure criteria for fused deposition modeling polycarbonate , 2014 .

[23]  Matthew Di Prima,et al.  On reducing anisotropy in 3D printed polymers via ionizing radiation , 2014 .

[24]  A. K. Sood,et al.  Parametric appraisal of mechanical property of fused deposition modelling processed parts , 2010 .

[25]  Alexander Tsouknidas,et al.  Impact absorption capacity of 3D-printed components fabricated by fused deposition modelling , 2016 .

[26]  Joseph J. Beaman,et al.  Process and control issues in selective laser sintering , 1988 .

[27]  Wales.  Fast, Precise, Safe Prototypes with FDM , 1991 .

[28]  P. McHugh,et al.  Dependence of mechanical properties of polyamide components on build parameters in the SLS process , 2007 .

[29]  D. Dimitrov,et al.  Investigating the achievable accuracy of three dimensional printing , 2006 .

[30]  J. Sarasua,et al.  Crystallization and thermal behaviour of optically pure polylactides and their blends , 2005 .

[31]  M. Cima,et al.  Mechanical properties of dense polylactic acid structures fabricated by three dimensional printing. , 1996, Journal of biomaterials science. Polymer edition.

[32]  Duc Truong Pham,et al.  A comparison of rapid prototyping technologies , 1998 .

[33]  A. Maazouz,et al.  Batch foaming of chain extended PLA with supercritical CO2: Influence of the rheological properties and the process parameters on the cellular structure , 2011 .

[34]  Sunil C. Joshi,et al.  3D printing in aerospace and its long-term sustainability , 2015 .

[35]  R. J. Gaymans,et al.  Fracture of polypropylene : 2. The effect of crystallinity , 1998 .

[36]  P. Wright,et al.  Anisotropic material properties of fused deposition modeling ABS , 2002 .

[37]  Adriaan Beukers,et al.  Residual stresses in thermoplastic composites—A study of the literature—Part I: Formation of residual stresses , 2006 .