Investigation on Damage of Laminates With a Surface Crack by Improved Deply Technique
用改进的揭层技术研究含表面裂纹层压板的损伤

An improved deply technique is presented in this paper. The cupric nitrate-alcohol is used instead of golden chloride-ether for marking solution, and an improved penetrating method of marking solution is also given. In this way, the damage of cross-ply glass fiber/epoxy laminates with a surface crack is studied, and the influences of the depth and the section geometry of surface crack on the damage form is explored. It is shown that the improved deply technique is effective and convenient.