A CMOD-Based Hybrid Approach to Determine Fracture Resistance Curve
This study proposes a hybrid approach that relies both on the numerically computed and on the experimentally measured load (P) versus the crack-mouth opening displacement (CMOD) relationships to derive the fracture resistance curve (J-R curve) for the mixed-mode I and II fracture specimen.The CMOD-based hybrid approach utilizes a single experimental specimen with a growing crack and multiple finite element (FE) models,each with a different crack depth.The experimental procedure measures the P-CMOD curve from a standard fracture specimen with a growing crack.The intersections between the experimental P-CMOD curve and the numerical P-CMOD curves from multiple FE models dictate the CMOD levels to compute the strain energy (U).This approach simplifies the J-R curve test for the single-edge-notched bend,SE(B),specimen by eliminating the multiple unloading and reloading procedures in determining the variation of the compliance during the test.This method also provides an alternative simple measurement of the J-R curves for mixed-mode I and II specimens.The validation procedure shows accurate predictions of the J-R curves for both SE(B) specimens and mixed-mode I and II specimens.
mixed-mode fracture fracture resistance J-R curve hybrid approach
Wuchao Yang Xudong Qian
Department of Civil and Environmental Engineering,National University of Singapore,Singapore 117576,Singapore
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）