Journal
ENGINEERING FRACTURE MECHANICS
Volume 250, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2021.107784
Keywords
Thermoplastic polymer; Polyamide-6; Stress Triaxiality; Failure strain; Failure criterion
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Funding
- Material Component Technology Development Program - Ministry of Trade, Industry & Energy (MOTIE, Korea) [20004983]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2019R1I1A1A01062323]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20004983] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2019R1I1A1A01062323] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, a function correlating failure strain and stress triaxiality was developed through combined experimental and finite element analysis, providing a viable failure criterion for complex components made of short fiber-reinforced polymers during the design stage where direct testing is not possible.
In this paper, the influence of the stress triaxiality on the failure strain of short fiber-reinforced composite, manufactured by the injection molding process, is investigated by tensile tests on notched ASTM-D638 specimen and ASTM E1820-01 U-Shape specimens made of a polyamide-6 thermoplastic polymer reinforced with 20% of short carbon fibers (PA6-20CF). From the combined experimental and FEA investigations, a function correlating the failure strain and the stress triaxiality has been developed can be utilized as a failure criterion for complex components made of short fibers reinforced polymers during the design stage, where no direct testing is a viable option.
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