Effects of crystalline orientation, twin boundary and stacking fault on the crack-tip behavior of a mode I crack in nanocrystalline titanium

2019 ◽  
Vol 139 ◽  
pp. 103205
Author(s):  
Jun Cai ◽  
Changwen Mi ◽  
Qiong Deng ◽  
Chenyi Zheng
Keyword(s):  
Twin Boundary ◽  
Crack Tip ◽  
Stacking Fault ◽  
Mode I ◽  
Mode I Crack ◽  
Crystalline Orientation ◽  
Nanocrystalline Titanium

The dislocation-free zone at a mode I crack tip

1995 ◽  
Vol 50 (2) ◽  
pp. 165-173 ◽  
Author(s):  
Jianqiao Chen ◽  
Shigeo Takezono
Keyword(s):  
Crack Tip ◽  
Mode I ◽  
Mode I Crack ◽  
Free Zone

The Asymptotic Elastic-Viscoplastic Field at Mode I Dynamic Propagating Crack-Tip

2007 ◽  
Vol 348-349 ◽  
pp. 817-820
Author(s):  
Zhen Qing Wang ◽  
Ji Bin Wang ◽  
Wen Yan Liang ◽  
Juan Su
Keyword(s):  
Crack Tip ◽  
Viscosity Coefficient ◽  
Plastic Strain Rate ◽  
Mode I ◽  
Mode I Crack ◽  
Moving Crack ◽  
Dynamic Propagating ◽  
Propagating Crack ◽  
Hardening Condition ◽  
Elastic Unloading

The viscosity of material is considered at propagating crack-tip. Under the assumption that the artificial viscosity coefficient is in inverse proportion to the power law of the plastic strain rate, an elastic-viscoplastic asymptotic analysis is carried out for moving crack-tip fields in power-hardening materials under plane-strain condition. A continuous solution is obtained containing no discontinuities. The variations of the numerical solution are discussed for mode I crack according to each parameter. It is shown that stress and strain both possess exponential singularity. The elasticity, plasticity and viscosity of material at the crack-tip only can be matched reasonably under linear-hardening condition. The tip field contains no elastic unloading zone for mode I crack.

Modelling of multiple crack-branching from Mode-I crack-tip in isotropic solids

2013 ◽  
Vol 109 ◽  
pp. 105-116 ◽  
Author(s):  
Y.J. Xie ◽  
J. Li ◽  
X.Z. Hu ◽  
X.H. Wang ◽  
M. Cai ◽  
...  
Keyword(s):  
Crack Tip ◽  
Crack Branching ◽  
Mode I ◽  
Mode I Crack ◽  
Multiple Crack ◽  
Isotropic Solids

Surface effects on mode-I crack tip fields: A numerical study

2010 ◽  
Vol 77 (7) ◽  
pp. 1048-1057 ◽  
Author(s):  
X.L. Fu ◽  
G.F. Wang ◽  
X.Q. Feng
Keyword(s):  
Numerical Study ◽  
Crack Tip ◽  
Surface Effects ◽  
Mode I ◽  
Mode I Crack ◽  
Crack Tip Fields
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