Constraint analysis of thickness effects on fracture resistance behavior of clamped single-edge notch tension specimen. (December 2020)

• Record Type: Journal Article
• Authors: Gong, Baoming; Xia, Congcong; Lacidogna, Giuseppe; Xu, Quanjun; Liu, Yong; Li, Yizhe
• Is Part Of: Theoretical and applied fracture mechanics. Volume 110(2020)
• Publication Date: 2020-12
• Subjects: J-Q theory -- SE(T) -- Crack-tip field -- Constraint; Fracture mechanics -- Periodicals; 620.1126
• DOI: 10.1016/j.tafmec.2020.102802
• Languages: English
• ISSNs: 0167-8442

Abstract

Highlights: Three-parameter concepts J-Q Z -M is developed to characterize the crack-tip fields. The improved constraint parameter Q Z for edge notch tension specimens is proposed. The constraint parameter Q Z exhibits approximately load- and distance-independence until large scale yielding. Abstract: The correlation between the out-of-plane stress and the in-plane stress is established based on the bending modified J - Q theory and the out-of-plane constraint parameter T Z . Accordingly, an improved J-Q Z -M constraint theory is developed to characterize the crack-tip fields by taking into account opening- and bending-dominated deformations in the ligament of the clamped single edge notch tension (SE(T)) specimens. Three-dimensional elastic-plastic finite element analyses (FEA) with a wide range of in-plane and out-of-plane constraints are performed to validate the proposed approach. It is found that the proposed J-Q Z -M constraint theory can effectively quantify the crack-tip fields of SE(T) specimens, and the constraint parameter Q Z exhibits approximately load- and distance-independence until large scale yielding (LSY).