Dynamic Mixed-Mode Crack Initiation and Growth in PMMA and Polycarbonate

2017 ◽  
pp. 25-30
Author(s):  
Balamurugan M. Sundaram ◽  
Hareesh V. Tippur
Keyword(s):  
Crack Initiation ◽  
Mixed Mode ◽  
Mixed Mode Crack

The Area Fracture Criterion of Iso-εθ Line for Mixed Mode Crack

2012 ◽  
Vol 193-194 ◽  
pp. 708-711
Author(s):  
Si Li Chen ◽  
Tao Yu ◽  
Jian Jun Shi ◽  
Jie Huang ◽  
Kai He Dong
Keyword(s):  
Crack Initiation ◽  
Mixed Mode ◽  
Fracture Criterion ◽  
Shape Change ◽  
Crack Tip ◽  
Fracture Line ◽  
Mixed Mode Crack ◽  
Engineering Significance ◽  
Crack Initiation Angle ◽  
Predicted Values

In practice, the crack in some engineering materials is often compound crack. Therefore, it is important engineering significance to study on fracture problem. Based on the shape change energy near crack tip portion, the area fracture criterion of Iso-εθ line for compound crack was proposed. A crack initiation angle formula and the fracture criterion were established. The results showed that the theoretical predicted values and the measured values are consistent. The compound crack fracture line area of fracture criterion was established.Tthe formulas are easy to be derived and convenient to apply.

Analysis of mixed mode crack initiation angles under various loading conditions

2000 ◽  
Vol 67 (5) ◽  
pp. 397-419 ◽  
Author(s):  
Shafique M.A. Khan ◽  
Marwan K. Khraisheh
Keyword(s):  
Crack Initiation ◽  
Mixed Mode ◽  
Loading Conditions ◽  
Mixed Mode Crack

Mixed-mode crack initiation at the edge of Cu/Si interface due to nanoscale stress concentration

2012 ◽  
Vol 96 ◽  
pp. 72-81 ◽  
Author(s):  
Kohei Kishimoto ◽  
Yabin Yan ◽  
Takashi Sumigawa ◽  
Takayuki Kitamura
Keyword(s):  
Stress Concentration ◽  
Crack Initiation ◽  
Mixed Mode ◽  
Mixed Mode Crack

Predicting Mixed Mode Crack Initiation Angles in Anisotropic Materials Using the Shape of the Crack Tip Core Region

2002 ◽  
Author(s):  
Shafique M. A. Khan ◽  
Marwan K. Khraisheh
Keyword(s):  
Crack Initiation ◽  
Mixed Mode ◽  
Crack Tip ◽  
Anisotropic Materials ◽  
Core Region ◽  
Mixed Mode Loading ◽  
Isotropic Materials ◽  
The Core ◽  
Mixed Mode Crack ◽  
Engineering Materials

Accurate simulation of crack propagation paths in engineering materials is what designers and engineers are always looking for. An important element of any simulation package is to define a criterion for crack initiation angles. Many criteria have been proposed to predict crack initiation angles under mixed mode loading. Most of them assume either a constant radius or a Mises type variable radius for the core region at the crack tip. In a recent study, we presented a detailed analysis of the core region and showed strong dependence of mixed mode crack initiation angles on the shape of the core region. In addition, we proposed a criterion based on the shape of the crack tip core region for isotropic materials. Since most engineering materials are anisotropic, it is necessary to modify the criterion developed for isotropic materials. In this study, we investigate the shape of the core region at the crack tip in mixed mode loading for anisotropic materials under different loading conditions. We employ isotropic linear elastic stress field along with Hill’s anisotropic yield criterion at the crack tip and examine the effect of anisotropy on the shape of the core region and its relation to crack initiation angles.

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