A comparative study of failure theories and predictions for fibre polymer composite laminates: Part (A)

Publisher Summary This chapter presents a comparison of the predictive capabilities of internationally recognized failure theories for fiber reinforced polymer composite laminates. It also discusses some of the major similarities and differences between the theories supplied. The predictions from each contributor are superimposed onto combined graphs to facilitate direct comparison. Reasons for the key overall differences among the predictions are also discussed. The theories are applied by their originators (or their collaborators) to carefully selected test cases that covered a wide range of lay-ups, materials, and in-plane loading conditions. Key features in each theory are identified, including the types of failure models employed, whether linear or nonlinear analysis is carried out, reliance on software and numerical methods, allowance for thermal stresses, and identification of the modes of failure. The results (initial and final failure envelopes and representative stress–strain curves) are superimposed to show similarities and differences among the predictions of the various theories. Bar charts are constructed to demonstrate the levels of agreement between the predicted initial and final failure stresses and strains. Sources of discrepancies among the predictions of the various failure theories are discussed.

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