基于Layerwise理论的层合结构能量释放率分析

Energy release rate analysis of laminated structures based on Layerwise theory

根据Layerwise理论,推导了复合材料层合结构脱层前缘的能量释放率计算公式,计算了复合材料层合梁的面内应力,并在脱层损伤层间引入虚拟弹簧层模型,应用VCCT技术,分析计算了脱层前缘的能量释放率。结果表明,研究层间裂纹问题的方法较传统方法具有更高的精度和效率。

Based on Layerwise theory, analyzing formulae of energy release rate at delamination front of composite laminated structures are derived and the in-plane stresses of composite laminated beams are calculated. Then the energy release rate at the delamination front is calculated by introducing virtual spring layer model into the delamination interface and adopting the VCCT technology. Results show that the present method of interlaminar crack problem has higher accuracy and efficiency than traditional ones.