1. Three-dimensional numerical analysis of out-of-plane creep crack-tip constraint in compact tension specimens
- Author
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S.T. Tu, F.Z. Xuan, Z.D. Wang, P.J. Sun, and Guan Wang
- Subjects
Materials science ,business.industry ,Tension (physics) ,Mechanical Engineering ,Numerical analysis ,Structural engineering ,Physics::Classical Physics ,Finite element method ,Physics::Geophysics ,Constraint (information theory) ,Stress (mechanics) ,Out of plane ,Stress redistribution ,Creep ,Mechanics of Materials ,General Materials Science ,Composite material ,business - Abstract
In this paper, the C ( t ) and C ∗ integrals, stress redistribution time t red and creep crack-tip stress distributions in the compact tension (CT) specimens with various thicknesses have been calculated by the three-dimensional (3D) finite element method, and the out-of-plane creep crack-tip constraint induced by specimen thickness is quantitatively characterized and analyzed in detail. The results show that the out-of-plane creep crack-tip constraint in the CT specimens could be characterized and analyzed by the new constraint parameter R . The 3D creep crack-tip constraint increases with increasing specimen thickness, and the 3D effect becomes more pronounced with increasing the parameter C ∗ . There is a central region with higher creep constraint along the crack front, the size of the region increases with increasing specimen thickness, and decreases with increasing creep time and parameter C ∗ . The factors of influencing the out-of-plane creep crack-tip constraint are analyzed.
- Published
- 2012