复合材料夹层结构因其比强度高、比刚度高、耐腐蚀等优异性能,被广泛应用于多个领域.但现役条件下,复合材料夹层结构也面临着各种损伤.在现有应用中,温度、荷载共同作用下的面层与芯材的张开型剥离(Ⅰ型断裂)是常见的失效模式.基于能量守恒的观点,应用弹性地基梁理论,推导开裂时面层与芯材之间裂纹扩展的应变能释放率表达式,并用该理论值与双悬臂梁试验得到的试验值作对比,验证温度-荷载耦合作用下裂纹扩展应变能释放率表达式的正确性.
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