Novel mechanical models of tensile strength and elastic property of FDM AM PLA materials: Experimental and theoretical analyses
| Autor: | Yuansong Chen, Yongjun Zhou, Yu Zhao |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Property (programming) Mechanical Engineering Modulus 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Orthotropic material 01 natural sciences 0104 chemical sciences Mechanics of Materials Transverse isotropy Approximation error Ultimate tensile strength lcsh:TA401-492 lcsh:Materials of engineering and construction. Mechanics of materials General Materials Science Composite material 0210 nano-technology Plane stress Test data |
| Zdroj: | Materials & Design, Vol 181, Iss, Pp-(2019) |
| ISSN: | 0264-1275 |
| DOI: | 10.1016/j.matdes.2019.108089 |
| Popis: | In order to develop FDM additive manufacturing and promote the application of this technology, the essential mechanical properties including tensile strength and elastic property of PLA material fabricated by FDM additive manufacturing are studied deeply this time. Two novel theoretical models have been built to predict the tensile strength and Young's modulus of FDM additive manufacturing PLA material with different printing angles and layer thicknesses in this study. Firstly, strength theoretical model is established based on transversely isotropic material hypothesis and Tsai-Hill strength criterion. Then, Young's modulus theoretical model is established based on orthotropic material hypothesis under plane stress state. Test data indicates that the tensile strength and Young's Modulus of FDM additive manufacturing PLA material increase as the printing angle increases or the layer thickness decreases. Relative Error (RE) between theoretical results and test data is put forward as a criterion to evaluate the accuracy of the theoretical models quantitatively. All the Relative Error are so small (≤0.14) that is satisfactory in engineering applications. Therefore, one can confirm that the theoretical models established during this research can predict the tensile strength and Young's modulus of FDM additive manufacturing PLA material with different printing angles and layer thicknesses precisely. Keywords: Additive manufacturing, Tensile strength, Elastic property, Transverse isotropy, Printing angle, Layer thickness |
| Databáze: | OpenAIRE |
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