scholarly journals Mixed-mode (I/II) crack initiation direction for elastic-plastic materials based on crack-tip plastic zone

2011 ◽  
Vol 2 (11) ◽  
Author(s):  
CM Sharanaprabhu ◽  
SK Kudari
Keyword(s):  
Crack Initiation ◽  
Plastic Zone ◽  
Mixed Mode ◽  
Crack Tip ◽  
Mode I ◽  
Elastic Plastic ◽  
Plastic Materials ◽  
Elastic Plastic Materials

Crack tip plastic zone under Mode I, Mode II and mixed mode (I+II) conditions

2010 ◽  
Vol 36 (5) ◽  
pp. 575-598 ◽  
Author(s):  
M.R. Ayatollahi ◽  
Karo Sedighiani
Keyword(s):  
Plastic Zone ◽  
Mixed Mode ◽  
Crack Tip ◽  
Mode I ◽  
Mode Ii

Plastic Zone Size at Sharp Indentation of Classical Elastic–Plastic Materials: Behavior at Ideally Plastic Hardening

2015 ◽  
Vol 138 (1) ◽  
Author(s):  
Per-Lennart Larsson
Keyword(s):  
Plastic Zone ◽  
Plastic Zone Size ◽  
Zone Size ◽  
Self Similarity ◽  
Elastic Plastic ◽  
Plastic Materials ◽  
Plastic Hardening ◽  
Sharp Indentation ◽  
Elastic Plastic Materials ◽  
Materials Behavior

Sharp indentation problems are examined based on finite element methods (FEMs) and self-similarity considerations. The analysis concerns classical elastic–plastic materials with low, or no, strain-hardening and especially the details of the behavior of the size of the plastic zone are at issue. The results are correlated using a single parameter, comprising both geometrical and mechanical properties, and compared with previously presented semi-analytical findings. The numerical analysis is restricted to cone indentation of elastic-ideally plastic materials.

In-Plane Mixed-Mode Fracture of the Thin Sheet Metal

2013 ◽  
Vol 444-445 ◽  
pp. 1301-1304
Author(s):  
Jing Lv ◽  
Bang Cheng Yang ◽  
Chun Ran ◽  
Yong Ping Shao
Keyword(s):  
Crack Initiation ◽  
Mixed Mode ◽  
Crack Extension ◽  
Thin Sheet ◽  
Crack Tip ◽  
Deformation Mode ◽  
Image Correlation ◽  
Mode I ◽  
Mixed Mode Fracture ◽  
Sheet Metals

The length of crack extension under stable crack extension is measured by digital image correlation technology and based on mixed-mode I/II fracture test. Quantitative analyses of the fracture properties are provided for thin sheet metals at stable crack extension under mode I, mode II and mixed-mode I/II loading conditions. The strain field of the crack tip at crack initiation is calculated by VIC-2D. It is suggested that the location of crack initiation is not at the crack tip. The fracture of recycled thin sheet metals is tough due to the large plastic deformation; mode I crack is the most difficult to extend; the load-carrying capacity is the minimum in 45° loading.

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