A study of mode-I self-similar dynamic crack propagation using a lattice spring model

2018 ◽  
Vol 96 ◽  
pp. 215-225 ◽  
Author(s):  
Gao-Feng Zhao ◽  
Kaiwen Xia
Keyword(s):  
Crack Propagation ◽  
Dynamic Crack Propagation ◽  
Mode I ◽  
Dynamic Crack ◽  
Spring Model ◽  
Lattice Spring Model ◽  
Self Similar ◽  
Similar Dynamic

Dislocation Distribution Function of the Surfaces of Mode III Dynamic Crack Subjected to Unit-Step Loads and Moving Increasing Loads

2006 ◽  
Vol 324-325 ◽  
pp. 101-104
Author(s):  
Xin Gang Li ◽  
Nian Chun Lü ◽  
Guo Zhi Song ◽  
Cheng Jin
Keyword(s):  
Distribution Function ◽  
Analytical Solution ◽  
Crack Propagation ◽  
Dynamic Crack Propagation ◽  
Dynamic Crack ◽  
Mode Iii ◽  
Dislocation Distribution ◽  
Unit Step ◽  
Complex Functions ◽  
Self Similar

By the theory of complex functions, dislocation distribution function concerning mode dynamic crack propagation problem under the conditions of unit-step loads and moving increasing loads was studied respectively. Analytical solution representations are attained by the methods of self-similar functions. The problems investigated can be transformed into Riemann-Hilbert problems and their closed solutions are obtained rather simple by this approach.

scholarly journals Dynamic Fracture Toughness of a Unidirectional Graphite/Epoxy Composite

2001 ◽  
Author(s):  
C. Liu ◽  
A. J. Rosakis ◽  
M. G. Stout
Keyword(s):  
Fracture Toughness ◽  
Composite Material ◽  
Crack Propagation ◽  
Epoxy Composite ◽  
Crack Tip ◽  
Dynamic Crack Propagation ◽  
Mode I ◽  
Dynamic Crack ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness

Abstract In this investigation, we studied the process of dynamic crack propagation in a fiber-reinforced composite material using the optical Coherent Gradient Sensing (CGS) technique combined with high-speed photography. The mode-I fracture toughness of the unidirectional graphite/epoxy composite, IM7/8551-7, as a function of the crack-tip speed, was measured quantitatively. It was found that up to the Rayleigh wave speed of the composite material, the mode-I fracture toughness is a decreasing function of the crack-tip velocity. This behavior is similar to that observed in the dynamic crack propagation along interfaces between two homogeneous solids.

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