Fatigue Thresholds of Delamination Crack Growth in Orthotropic Graphite/Epoxy Laminates

2008 ◽  
pp. 200-200-17 ◽  
Author(s):  
C-G Gustafson ◽  
L Jilkèn ◽  
PA Gradin
Keyword(s):  
Crack Growth ◽  
Delamination Crack

Delamination Crack Growth in Composite Laminates

2008 ◽  
pp. 135-135-33 ◽  
Author(s):  
ASD Wang ◽  
M Slomiana ◽  
RB Bucinell
Keyword(s):  
Crack Growth ◽  
Composite Laminates ◽  
Delamination Crack

Modeling of the Gas-Controlled Crack Growth: Non-Ideal vs Ideal Sink

2016 ◽  
Author(s):  
Alla V. Balueva ◽  
Ilia N. Dashevskiy
Keyword(s):  
Closed Form ◽  
Crack Growth ◽  
Gas Diffusion ◽  
Delamination Crack ◽  
Closed Form Solutions ◽  
Small Pressure

We consider delamination crack growth controlled by gas diffusion into crack. Initially, with small pressure, the crack can be considered as an ideal sink. However, as crack grows, the pressure becomes greater, and therefore the crack cannot be considered an ideal sink anymore. In this research for both ideal- and real-sink conditions, closed-form solutions for the dependence of the radius of the growing delamination on time are obtained.

Numerical Modeling and Simulation of Delamination Crack Growth in CF/Epoxy Composite Laminates under Cyclic Loading Using Cohesive Zone Model

2011 ◽  
Vol 326 ◽  
pp. 37-52 ◽  
Author(s):  
Hassan Ijaz ◽  
M Aurangzeb Khan ◽  
Waqas Saleem ◽  
Sajid Raza Chaudry
Keyword(s):  
Crack Growth ◽  
Fatigue Damage ◽  
Composite Laminates ◽  
Damage Evolution ◽  
Composite Structures ◽  
Cohesive Zone Model ◽  
Fatigue Loading ◽  
Zone Model ◽  
Evolution Law ◽  
Delamination Crack

This paper presents the mathematical modelling of fatigue damage able to carry out simulation of evolution of delamination in the laminated composite structures under cyclic loadings. A new elastic fatigue damage evolution law is proposed here. A classical interface damage evolution law, which is commonly used to predict static debonding process, is modified further to incorporate fatigue delamination effects due to high cycle loadings. The proposed fatigue damage model is identified using Fracture Mechanics tests like DCB, ENF and MMB. Simulations of delamination under fatigue loading are performed and results are successfully compared with reported experimental data on HTA/6376C unidirectional material. Delamination crack growth with variable fatigue amplitude is also performed and simulation results show that the proposed fatigue damage law can also accommodate this variable amplitude phenomenon. A study of crack tip behaviour using damage variable evolution is also carried out in this paper. Finally the effect of mesh density on crack growth is also discussed.

scholarly journals Delamination crack growth of unidirectional CF/PEEK composite in creep at elevated temperatures.

1991 ◽  
Vol 57 (535) ◽  
pp. 556-562 ◽  
Author(s):  
Ryuichi OHTANI ◽  
Takayuki KITAMURA ◽  
Hiroshi MORITA ◽  
Masaya YAMADA ◽  
Masaki HOJO
Keyword(s):  
Crack Growth ◽  
Elevated Temperatures ◽  
Delamination Crack ◽  
Peek Composite
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