Characterizing and modeling the pressure- and rate-dependent elastic-plastic-damage behaviors of polypropylene-based polymers
AuthorsPulungan, Ditho Ardiansyah
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AbstractPolymers in general exhibit pressure- and rate-dependent behavior. Modeling such behavior requires extensive, costly and time-consuming experimental work. Common simplifications may lead to severe inaccuracy when using the model for predicting the failure of structures. Here, we propose a viscoelastic viscoplastic damage model for polypropylene-based polymers. Such a set of constitutive equations can be used to describe the response of polypropylene under various strain-rates and stress-triaxiality conditions. Our model can also be applied to a broad range of thermoplastic polymers. We detail the experimental campaign that is needed to identify every parameter of the model at best. We validated the proposed model by performing 3-point bending tests at different loading speeds, where the load-displacement response of polypropylene beam up to failure was accurately predicted.
CitationPulungan D, Yudhanto A, Goutham S, Lubineau G, Yaldiz R, et al. (2018) Characterizing and modeling the pressure- and rate-dependent elastic-plastic-damage behaviors of polypropylene-based polymers. Polymer Testing. Available: http://dx.doi.org/10.1016/j.polymertesting.2018.02.024.
SponsorsThe research reported in this publication was supported by SABIC and King Abdullah University of Science and Technology (KAUST). First author would like to thank Mr. Yongwei Wang for deep math discussions.