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Basic question regarding composite failure during impact

viveknra's picture

Hi everyone.. I am doing low velocity impact analysis on graphite/ epoxy
composite plate using abaqus. I have a basic question. During transverse
impact, when does a composite fail? The transverse tensile strength of
my composite is 45 Mpa, transverse compressive strength is 252Mpa,
Longitudinal tensile & compressive strengths are 1520 and 1590 Mpa
respectively. During my analysis, I got the Maximum von mises stress as
2093MPa at the point of impact, but still the failure criterion is not
showing any damage initiation. I have used Hashin damage criteria. Can
anyone help me out?

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