Nonlinear rate dependent response of thick-section composite laminates
Abstract
The rate dependent behavior of AS4/PEEK thermoplastic composite was characterized over a wide strain range $\rm (10\times 10\sp{-1}\ sec\sp{-1}$ to 1,000 sec$\sp{-1}).$ The low to moderate experiments were conducted with a servohydraulic testing machine, while the high strain rate experiments were conducted with a Split Hopkinson Pressure Bar. Two rate dependent models are introduced to model the material response. A rate dependent model based on a one-parameter plasticity model and a modified Johnson rate dependent model. Both models are shown to adequately model the experimental results over the complete strain range.
Degree
Ph.D.
Advisors
Sun, Purdue University.
Subject Area
Aerospace materials|Materials science|Mechanical engineering
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