The purpose of this study is to compare the theoretical failure predictions of fourteen failure criteria to experimental test data based on Thornel T300/5208 graphite epoxy. This comparison was performed for nine layups, five different loads and material properties at three temperature levels. Thornel T300/5208 material system was chosen because it is well characterized and has a failure envelope typical of many other high strength carbon epoxies. This study considered only macroscopic failure criteria loaded in a quasi-static conditions; effects such as fatigue, creep, microscopic damage, through the thickness loading, compression after impact and hygrothermal effects were not considered. Only ultimate failure of the coupon specimens was compared to test data; however, the ply-by-ply failure and ply failure mode were tracked. Theoretical failure prediction and percentage difference are reported for each failure criterion at specific loadings, temperature and layups.
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