修理问题中层压板特性的工程估算方法

An Engineering Approach to Evaluation of Mechanical Properties of Composite Laminate

研究了层压板修理中对无损、开孔以及具冲击损伤情况下力学性能的简便工程计算方法。根据自行设计的试验及其相关文献的试验结果,采用Heslehurst关于层压板弹性常数及强度的估算方法时数据进行了分析,同时把其对开孔板得到剩余强度的估算方法推广到合冲击损伤在内的损伤结构剩余强度。多种材料体系和铺层方式组成的层压板的试验和计算对比表明,该工程算法给出的精度大都在20%以内。因此可以用该算法来确定结构的修理容限的下限。

An engineering methbd evaluating mechanical properties of composite laminate with impact damage, hole and undamaged sample is presented. Experiment results of the strength and equivalent elastic characteristic of different material system and layer up＇ s laminate are analyzed by using Heslehurt＇ s formula. At the same time, resid- ual strength of a laminate after impact can be estimated by using the method for damaged hole with the errors within 20%. By using the engineering method, it can be easily determined whether the damaged area of a laminate is within repair tolerance.