Molecular dynamics simulation for the quantitative prediction of experimental tensile strength of a polymer material
Jun Koyanagi,Naohiro Takase,Kazuki Mori,Takenobu Sakai +3 more
- Vol. 2, pp 100041
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TLDR
In this paper, a quantitative method for predicting the experimental value of the tensile strength of a polymer material by using molecular dynamics (MD) simulation is presented. But the method is limited to the case of polyamide.Abstract:
This paper presents a quantitative method for predicting the experimental value of the tensile strength of a polymer material by using molecular dynamics (MD) simulation. Because the tensile strength obtained by MD simulation is almost always higher than the experimental value, a solution is suggested in the present study. Several simulations varying simulation volumes (i.e., number of molecules) and tensile loading speeds (i.e., strain rate) were implemented; the results confirmed that the tensile strength decreases with increasing simulation volume and decreasing strain rate. Firstly, strength as a function of the simulation volume was determined based on Weibull statistics and then the relationship was extrapolated to a much higher number of molecules, which was equivalent to a real specimen. Secondly, the relationship between the tensile strength and strain rate was determined and it was extrapolated to match the strain rate in actual experiments. Consequently, a predicted strength was close to the experimental result.read more
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A Possibility for Quantitative Detection of Mechanically-Induced Invisible Damage by Thermal Property Measurement via Entropy Generation for a Polymer Material
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Molecular Dynamics Simulation for Evaluating Fracture Entropy of a Polymer Material under Various Combined Stress States
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