Mechanical properties of PC under multiaxial loading

What is it about?

Multiaxial stress-controlled and mixed stress-strain-controlled cyclic tests were carried out to investigate the multiaxial ratchetting of polycarbonate (PC) at room temperature. The effects of applied mean stress, stress amplitude, loading rate, loading path and loading history on the ratchetting are discussed. Some conclusions useful to construct a reasonable constitutive model were obtained.

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Why is it important?

PC components are often subjected to a form of multiaxial stress-controlled cyclic loading, and fail due to a large ratchetting strain or fatigue damage. The results obtained in this work helped to understand the mechanical properties of PC under multiaxial cyclic loadings and then provided a guidance for rational application of PC products.