scholarly journals Mode-I debonding of a double cantilever beam: A comparison between cohesive crack modeling and Finite Fracture Mechanics

2017 ◽  
Vol 124 ◽  
pp. 57-72 ◽  
Author(s):  
R. Dimitri ◽  
P. Cornetti ◽  
V. Mantič ◽  
M. Trullo ◽  
L. De Lorenzis
Keyword(s):  
Fracture Mechanics ◽  
Cantilever Beam ◽  
Double Cantilever Beam ◽  
Cohesive Crack ◽  
Mode I ◽  
Finite Fracture Mechanics

Double Cantilever Beam Measurement and Finite Element Analysis of Cryogenic Mode I Interlaminar Fracture Toughness of Glass-Cloth/Epoxy Laminates

2000 ◽  
Vol 123 (2) ◽  
pp. 191-197 ◽  
Author(s):  
Y. Shindo ◽  
K. Horiguchi ◽  
R. Wang ◽  
H. Kudo
Keyword(s):  
Fracture Toughness ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Cantilever Beam ◽  
Double Cantilever Beam ◽  
Mode I ◽  
Interlaminar Fracture Toughness ◽  
Element Analysis ◽  
Interlaminar Fracture ◽  
Delamination Crack

An experimental and analytical investigation in cryogenic Mode I interlaminar fracture behavior and toughness of SL-E woven glass-epoxy laminates was conducted. Double cantilever beam (DCB) tests were performed at room temperature (R.T.), liquid nitrogen temperature (77 K), and liquid helium temperature (4 K) to evaluate the effect of temperature and geometrical variations on the interlaminar fracture toughness. The fracture surfaces were examined by scanning electron microscopy to verify the fracture mechanisms. A finite element model was used to perform the delamination crack analysis. Critical load levels and the geometric and material properties of the test specimens were input data for the analysis which evaluated the Mode I energy release rate at the onset of delamination crack propagation. The results of the finite element analysis are utilized to supplement the experimental data.

A double cantilever beam incorporating cohesive crack modeling for superconductors

2020 ◽  
Vol 34 (15) ◽  
pp. 2050166 ◽  
Author(s):  
K. F. Wang ◽  
Y. Q. Wang ◽  
B. L. Wang ◽  
L. Zheng
Keyword(s):  
Cantilever Beam ◽  
Electromagnetic Force ◽  
Double Cantilever Beam ◽  
Crack Opening ◽  
Cohesive Crack ◽  
Opening Displacement ◽  
Cohesive Interface ◽  
Potential Applications ◽  
Space Solar Power ◽  
Separation Relation

In this paper, a double cantilever beam (DCB) specimen incorporating cohesive crack is developed for superconductors which have potential applications in high temperature superconducting cables in space solar power station. The cohesive interface is introduced along the crack front of the DCB model under electromagnetic force. The load-separation relation (i.e. the crack opening displacement) is used as the fracture mechanics parameter and the corresponding curves during fracture process are obtained and verified by the finite element numerical method. Results show that the presence of tensile electromagnetic force makes crack propagate easily. Superconductors with small cracks have good adaptability to the oscillation of magnetic fields while that with large cracks are easier to fracture during the descent of the magnetic field. In addition, the ductility ratio of the cohesive interface can significantly increase the fracture strength. The length of fracture zone decreases as the crack length increases.

scholarly journals Interlaminar Fracture of Stitched GFRP Laminates

1996 ◽  
Vol 5 (1) ◽  
pp. 096369359600500
Author(s):  
Rongzhi Li ◽  
Lin Ye ◽  
Yiu-Wing Mai
Keyword(s):  
Crack Propagation ◽  
Cantilever Beam ◽  
Double Cantilever Beam ◽  
Failure Mechanisms ◽  
Mode I ◽  
Interlaminar Fracture ◽  
Fracture Performance

The mode I interlaminar fracture of Kevlar thread stitched GFRP laminates has been studied using double-cantilever-beam (DCB) tests. It was found that stitching density and patterns influence interlaminar fracture performance of composites mainly through the different failure mechanisms of stitch threads during crack propagation.

Sign in / Sign up

Export Citation Format

Share Document