Ultrahigh-Strain-Rate-Predicting Method for Nanosecond-Laser-Induced Shock on Aeronautical Composite Materials

What is it about?

Laser shock adhesion test (LASAT) manifest its superiority in detecting kiss bonding and weak bonding in aeronautical composite materials. But the strain rate in the pulse laser shock test is approximately 105 -106 s−1(an ultra-high strain rate), which causes the current static or quasi-static constitutive models, failure criteria, and damage evolution are no longer applicable. Therefore, this article proposed the use of a 3D orthogonal anisotropic constitutive model of strain-rate-dependence, in which modulus and strength are proportional to the strain rate and follow a logarithmic relationship.

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