Prediction Method of the Dent Depth of Composite Laminates Subjected to Quasi-Static Indentation
A method was developed to predict numerically the dent depth of composite laminates subjected to quasi-static indentation. A progressive damage analysis was conducted for composite laminates under quasi-static transverse compressive loading by using a strain based Hashin and Yeh failure criteria as well as the FEM, and a series of degraded elastic constants of the damaged zone were drawn from the numerical results. The effective elastic constants of the damaged zone of the laminates were reevaluated according to Sun’s explicit expression. Finally, the dent depth vs. indentation force curve was predicted based on Swanson’s contact theory. The numerical simulations on the static indentation tests of T700/BA9912, T700S/5228 and T700/QY9511 laminates were done via this method. The numerical results agree well with the test data in the terms of the contact force and the corresponding dent depth.
Liangchi Zhang, Chunliang Zhang and Zichen Chen
Q. Ye et al., "Prediction Method of the Dent Depth of Composite Laminates Subjected to Quasi-Static Indentation", Advanced Materials Research, Vols. 328-330, pp. 1483-1486, 2011