Mixed mode fracture study of PMMA using digital gradient sensing method

Mixed mode fracture study of PMMA using digital gradient sensing method
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使用数字梯度传感方法研究 PMMA 的混合模式断裂

DOI:
10.1016/j.engfracmech.2014.02.020
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发表时间:
2014-03
影响因子:
5.4
通讯作者:
Wang, Shiyue
Wang, Shiyue
中科院分区:
工程技术2区
文献类型:
--
作者:
Zhang, Rui;Guo, Ran;Wang, Shiyue

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The optical method of digital gradient sensing is used to the study of fracture characteristics. Fracture experiments are performed on PMMA specimens with different offset crack under three-point-bending, which is appropriate for mixed-mode fracture analysis. The full-field displacements around the crack-tip are used to study the fracture characteristics such as evaluation of deformation field, crack tip stress gradients, and crack initiation. Mixed-mode stress intensity factors and crack tip location are calculated simultaneously from DGS data by fitting the analytically angular deflections (or in-plane gradients of stresses) field using the method of nonlinear least-squares and are in good agreement with finite element results.
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