低速冲击作用下泡桐木夹层梁界面分层损伤机理  

Interface Delamination Damage Mechanism of Paulownia Wood Sandwich Beams under Low-velocity Impact

作　　者：龚海亮[1] 刘伟庆[1] 万里[1] 余轶[1] 

机构地区：[1]南京工业大学土木工程学院、先进工程复合材料研究中心,江苏南京211816

出　　处：《材料科学与工程学报》2013年第5期723-727,共5页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51238003,51208251)

摘　　要：纤维增强复合材料泡桐木夹层梁在使用过程中不可避免地会遭受各种各样的低速冲击作用而发生损伤,直接影响其剩余承载性能,本文假定泡桐木芯材在低速冲击作用下,会发生分层连续屈曲破坏,同时结合理想弹塑性地基理论,建立了泡桐木夹层梁相应的界面分层损伤数值模型。基于该模型,以塑性变形为参数计算了低速冲击时最大接触力的大小,并与试验结果相对比,误差在合理范围之内。During employment, fiber reinforced paulownia wood sandwich beams inevitably suffer from low-velocity impact, thus leading to beam damage and negatively affecting their residual loading capacity as wll. Assuming paulownia wood core to be layer continuously buckling under low-velocity impact, and combining interfacial delamination, a numerical function was proposed in which the wood core was considered as an ideal elastic-plastic foundation. The maximum contact force during low velocity impact was evaluated based on the plastic deformation. The results show that the difference between theoretical analyses and test results fall on an acceptable range.

关 键 词：低速冲击 泡桐木夹层梁 分层损伤 最大冲击接触力 

分 类 号：TB33[一般工业技术—材料科学与工程] TU41[建筑科学—岩土工程]