IMECH-IR  > 非线性力学国家重点实验室
 A Dugdale model based geometrical amplifier enables the measurement of separation-to-failure for a cohesive interface Wei YJ(魏宇杰) Source Publication THEORETICAL & APPLIED MECHANICS LETTERS 2011 Volume 1Issue:1Pages:011006 ISSN 2095-0349 Abstract Regardless of all kinds of different formulae used for the traction-separation relationship in cohesive zone modeling, the peak traction $\sigma_{ m}$ and the separation-to-failure $\delta_0$ (or equivalently the work-to-separation $\Gamma$) are the primary parameters which control the interfacial fracture behaviors. Experimentally, it is hard to determine those quantities, especially for $\delta_0$, which occurs in a very localized region with possibly complicated geometries by material failure. Based on the Dugdale model, we show that the separation-to-failure of an interface could be amplified by a factor of $L/r_{ p}$ in a typical peeling test, where $L$ is the beam length and $r_{ p}$ is the cohesive zone size. Such an amplifier makes $\delta_0$ feasible to be probed quantitatively from a simple peeling test. The method proposed here may be of importance to understanding interfacial fractures of layered structures, or in some nanoscale mechanical phenomena such as delamination of thin films and coatings. URL 查看原文 Language 英语 Department LNM微结构计算力学（筹） Document Type 期刊论文 Identifier http://dspace.imech.ac.cn/handle/311007/48734 Collection 非线性力学国家重点实验室 Recommended CitationGB/T 7714 Wei YJ. A Dugdale model based geometrical amplifier enables the measurement of separation-to-failure for a cohesive interface[J]. THEORETICAL & APPLIED MECHANICS LETTERS,2011,1(1):011006. APA Wei YJ.(2011).A Dugdale model based geometrical amplifier enables the measurement of separation-to-failure for a cohesive interface.THEORETICAL & APPLIED MECHANICS LETTERS,1(1),011006. MLA Wei YJ."A Dugdale model based geometrical amplifier enables the measurement of separation-to-failure for a cohesive interface".THEORETICAL & APPLIED MECHANICS LETTERS 1.1(2011):011006.