Open Access
Ductile Tearing Resistance of Metal Sheets
Reads0
Chats0
TLDR
In this article, the authors used results of FE simulations of crack extension in panels by the cohesive model to validate analytical procedures for determining J -integral values at large crack extension from measurable quantities, namely the force vs displacement records.Abstract:
The concept of R -curves has been adopted to characterise stable crack extension and predict residual strength of thin-walled structures particularly in the aircraft industry. The present contribution uses results of FE simulations of crack extension in panels by the cohesive model to validate analytical procedures for determining J -integral values at large crack extension from measurable quantities, namely the force vs. displacement records. The numerically determined J -integral is taken as the benchmark for the outcome of the analytical formulas. The geometry dependence of J and CTOD based R -curves is investigated and alternative concepts like CTOA and dissipation rate at crack extension are discussed.read more
Citations
More filters
Journal ArticleDOI
Experimental evaluation of contour J integral and energy dissipated in the fracture process zone
Daniel Vavrik,I Jandejsek +1 more
TL;DR: In this article, the fracture toughness of thin wall materials can be determined by the direct calculation of the contour J integral and the experimental evaluation of the energy dissipated by the fracture process zone and the newly developed crack is even more fundamental.
Journal ArticleDOI
Notch bluntness effects on fracture toughness of a modified S690 steel at 150 °C
TL;DR: In this paper, the effect of blunt defects on the structural integrity assessment of steels is addressed and an empirical fit is developed to describe the impact of notch radius on cleavage fracture toughness.
Journal ArticleDOI
Critical remarks to cohesive zone modeling for three-dimensional elastoplastic fatigue crack propagation
Huang Yuan,Xiao Li +1 more
TL;DR: In this article, the constraint effects to cohesive zone modeling were not explicitly studied so that the three-dimensional crack cannot be analyzed reasonably, and different cyclic cohesive zone models were introduced but lacking in experimental verifications.
Journal ArticleDOI
Blunt defect assessment in the framework of the failure assessment diagram
TL;DR: In this article, the effect of blunt defects on the structural integrity assessment of reactor pressure vessel (RPV) and pipeline steels is addressed. And the results are analyzed in the framework of the failure assessment diagram (FAD), showing that the existing shape of the FAD is also suitable for assessments of blunt defect and how the concepts introduced can be used to reduce the conservatism in defect assessment, define margins on failure and indicate when plastic collapse is the dominant failure mechanism.
References
More filters
Book
The stress analysis of cracks handbook
TL;DR: The Stress Analysis of Cracks Handbook as mentioned in this paper provides a comprehensive, easy-to-access collection of elastic stress solutions for crack configurations, along with other relevant information, such as displacements, crack opening areas, basic stress functions source references, accuracy of solutions, and more.
Book ChapterDOI
Some further results of J-integral analysis and estimates.
TL;DR: In this article, it was shown that the J-integral can be directly evaluated from single load-displacement records for a series of crack toughness specimens having the common feature that their only significant length dimension is that of the uncracked ligament.
Book ChapterDOI
The j integral as a fracture criterion
JA Begley,JD Landes +1 more
TL;DR: In this paper, the critical J value fracture criterion refers to crack initiation under plane strain conditions from essentially elastic to fully plastic behavior, and it can be evaluated experimentally with two steel alloys, one of low and the other of intermediate strength.
Journal ArticleDOI
A review of the CTOA/CTOD fracture criterion
TL;DR: The CTOA fracture criterion has been used with three-dimensional analyses to study constraint effects, crack tunneling, and the fracture process as discussed by the authors, and has been successfully applied to numerous structural applications, such as aircraft fuselages and pipelines.
Related Papers (5)
Prediction of stable tearing of 2024-T3 aluminum alloy using the crack-tip opening angle approach
J. G. Bakuckas,J. C. Newman +1 more
An engineering approach to safety assessment for non-J-controlled crack growth
Bo Wang,Keh-Chin Hwang +1 more