On the Role of Iron Dissolution in Crack Propagation During Hydrogen Charging of an Fe-Pt Alloy

1973 ◽  
Vol 120 (5) ◽  
pp. 607 ◽  
Author(s):  
H. W. Pickering ◽  
P. J. Byrne
Keyword(s):  
Crack Propagation ◽  
Iron Dissolution ◽  
Hydrogen Charging ◽  
Pt Alloy

Long-rod impact phenomena: role of wave interaction on crack propagation

1995 ◽  
Vol 17 (1-3) ◽  
pp. 195-204 ◽  
Author(s):  
J.H. Choi ◽  
C.H. Lee ◽  
S.N. Chang ◽  
S.K. Moon
Keyword(s):  
Crack Propagation ◽  
Wave Interaction ◽  
Impact Phenomena ◽  
Long Rod

Lifetime Assessment of Particulate Ceramic Composite with Residual Stresses

2017 ◽  
Vol 754 ◽  
pp. 107-110
Author(s):  
Luboš Náhlík ◽  
Zdeněk Majer ◽  
Kateřina Štegnerová ◽  
Pavel Hutař
Keyword(s):  
Residual Stresses ◽  
Crack Propagation ◽  
Mechanical Loading ◽  
Ceramic Composite ◽  
Subcritical Crack Growth ◽  
Particulate Composites ◽  
Time To Failure ◽  
Complex Load ◽  
Composite Surface

A micro-crack propagation in particulate ceramic based composite was studied using finite element method (FEM). Subcritical crack growth (SCG) was numerically simulated under complex load conditions (mechanical loading and loading by internal residual stresses). The effect of residual stresses on the crack propagation was studied. Two-dimensional computational model of particulate ceramic composite with material properties corresponding to low temperature co-fired ceramics (LTCC) was developed. The results indicate that the presence of residual stresses significantly reduces values of stress intensity factor in the vicinity of composite surface and the direction of residual stresses around the particles contributes to the micro-crack deflection from the particles. The time to failure of the composite under mechanical loading was determined. Results obtained contribute to a better understanding of the role of residual stresses during micro-crack propagation in ceramic particulate composites.

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