Modeling Analysis of Tensile Tests of Bundled Filaments with a Bimodal Weibull Survival Function
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A convolution model applied to single mode Weibull fiber bundle experiments was extended to predict the response of bimodal model bundles. Published data for bimodal SiC fibers predicted the sensitivity of bundle test as a function of gauge length. A bundle test could rapidly determine the modality of a bundle from experiments at two gauge lengths. Next, the method checked the applied strain rate bimodality of Kevlar. The analysis indicates that a bundle test cannot determine the parameters of a model that predicts variation in apparent modulus or strain to failure since slack in the bundle generates these effects.
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