Stress intensity factor and T-stress solutions for three-dimensional clamped single edge notched tension (SENT) specimens

Zheng Liu, Dunji Yu, Jiankai Tang, Xu Chen, Xin Wang

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

In the present paper, a crack compliance analysis approach and extensive three-dimensional finite element analysis were conducted for clamped SENT specimens, which is one of the most widely used low-constraint specimens for less-conservative fracture toughness testing. A wide range of geometrical parameters variations are considered including in-plane crack depth to plate width ratio (a/W), out-of-plane plate thickness to width ratio (B/W), and daylight to width ratio (H/W). Complete solutions of stress intensity factor (K), in-plane T-stress (T11) and out-of-plane T-stress (T33) are obtained. The results obtained from above two methods are in good agreement. Furthermore, the combination of the effects of crack depths (a/W), plate thickness (B/W), and daylight to width ratio (H/W) on the stress intensity factor, T11 and T33 stress are thus illustrated. To better understand the difference between the derived stress intensity factor solutions and 2D plane strain results, fracture experiments were conducted for clamped SENT specimens with different crack depths. Solutions obtained will be very useful for analyzing fracture toughness test data and determining fatigue crack growth rate for clamped SENT specimens with different crack depths (a/W), plate thickness (B/W), and daylight to width ratio (H/W).

Original languageEnglish
Pages (from-to)11-23
Number of pages13
JournalInternational Journal of Pressure Vessels and Piping
Volume168
DOIs
StatePublished - Dec 2018
Externally publishedYes

Funding

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 51675373 and No. 51435012 ). XW's work is also supported by Natural Sciences and Engineering Research Council of Canada ( RGPIN-2015-03994 ). Helpful discussions with Dr. Bill Tyson at CanmetMATERIALS are also gratefully acknowledged.

Keywords

  • 3D finite element analysis
  • Crack compliance analysis method
  • SENT
  • Stress intensity factor
  • T-stress

Fingerprint

Dive into the research topics of 'Stress intensity factor and T-stress solutions for three-dimensional clamped single edge notched tension (SENT) specimens'. Together they form a unique fingerprint.

Cite this