Characterizing and Modeling the Pressure- and Rate-Dependent Elastic-Plastic-Damage Behavior of Polypropylene-Based Polymers

Abstract

Polymers 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. The model can also be applied to a broad range of thermoplastic polymers. The experimental campaign that is needed to identify every parameter of the model accurately is detailed. The proposed model was validated by performing 3-point bending tests at different loading speeds, where the load-displacement response of polypropylene beam up to failure was accurately predicted.

Department(s)

Mechanical and Aerospace Engineering

Comments

King Abdullah University of Science and Technology, Grant None

Keywords and Phrases

Damage model; Impact polypropylene; Stress relaxation; Viscoelasticity; Viscoplasticity

International Standard Serial Number (ISSN)

0142-9418

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2025 Elsevier, All rights reserved.

Publication Date

01 Jul 2018

Link to Full Text

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