含有界面裂纹的粘弹性层合板应变能释放率的计算

刘玉岚; 王彪; 王殿富

含有界面裂纹的粘弹性层合板应变能释放率的计算

哈尔滨工业大学, 复合材料研究所, 哈尔滨, 150001

基金项目: 国家自然科学基金资助项目(50232030;10172030);黑龙江省自然科学基金资助项目;国家杰出青年基金

详细信息

作者简介:
刘玉岚(1962- ),吉林人,博士(E-mail:myliu51@hotmail.com)

中图分类号: O346.1
计量
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- 被引次数: 0
出版历程
- 收稿日期: 2001-09-27
- 修回日期: 2002-08-25
- 刊出日期: 2003-01-15

On the Calculation of Energy Release Rate for Viscoelastic Cracked Laminates

Research Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

摘要

摘要: 将裂纹扩展所对应的能量释放率定义为同一时刻,同样载荷条件下两种状态的能量之差.一是裂纹长度为a时,系统内能,第二状态是指裂纹长度为a+Δa时系统内能.这样,所定义的能量释放率相当于在无限短时间内,裂纹从a扩展到a+Δa所释放的能量.通过计算发现,对于给定的加载历史,应变能释放率是时间的函数,它的最大值相对应于层间开裂临界状态.在William工作的基础上,根据经典梁的理论求得双悬臂梁结构的应变能释放率的显函表达式.
- 层合板 /
- 粘弹性模型 /
- 脱层分析
Abstract: The energy release rate(ERR) of crack growth as the energy change at the same time t between the two states of the structure is redefined, one is with crack length a under the loading σ(t), the other is the state with crack lengtha +Δa under the same loading condition. Thus the defined energy release rate corresponds to the released energy when a crack grows from a to a+Δa in an infinitesimal time. It is found that under a given loading histroy, the ERR is a function of time, and its maximum value should correspond with the critical state for delamination to propagate. Following William's work, the explicit expressions of ERR for DCB experimental configurations to measure the interfacial fracture toughness have been obtained through the classical beam assumption.
- compasite laminate /
- viscoelastic model /
- analysis delamination

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参考文献(15)

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