On Compressive Behavior and Damage Growth of Impact Damaged Cmposite Laminates
This paper studies mechanism of compressive property reduction of quasi-isotropic laminated plates(45o/0°/-45o/90°n) due to an impact damage by focusing the damage growth in order to explain the low CAI strength. The damage is consisted of a spiral array of inter-connected transverse cracks and delaminations. Two types of the specimens with different ineterlaminar toughnesses were tested. The damage growth mechanism was discussed through the observation of the damaged specimen during the compression test. Sudden failure triggered by the instability of delamination growth occurred in local-dominant postbuckling after a little delamination propagation, where the deformed shape of damaged portion was elliptic and little global deformation of the intact portion existed. Three dimensional finite element analysis was conducted by modeling the typical impact damage. The numerical results of the compressive behavior and the energy release rate distribution along the delamination front were consistent with those observed in the experiment.
Laminate Impact damage Buckling Finite element analysis Energy release rate
Hiroshi Suemasu Makoto Ichiki Hayato Sameshima Toshio Nagashima Yuichiro Aoki
Department of Engineering and Applied Sciences, Sophia University Graduate School, Sophia University Advanced Materials Group, Aerospace Research and Development Directorate,Japan Aerospace Exploration
国际会议
The Ninth China-Japan Joint Conference on Composite Materials(第九届中日复合材料学术会议 CJJCC-9)
呼和浩特
英文
3-10
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）