Low-Velocity Impact Testing of Thermoplastic and Thermoset Matrix Composite Materials.

摘要

The effects of boundary conditions, specimen thickness, indenter nose diameter, impact velocity and target material on the damage initiation load and mode of failure during low-velocity impact of composite materials are studied. A mathematical model is presented which theoretically predicts the effects of the various parameters on the damage initiation force. In addition, a comparison of the static indentation versus low-velocity impact results is made in an effort to prove that low-velocity impact can be sufficiently modelled using statically based theories. Experimental data indicated that the mathematical model predicts the effect of material thickness on damage initiation force very well. Data obtained from static indentation and low-velocity impact were found to be comparable. Some differences were noted in the impact failure modes of the two materials tested.