scholarly journals Tensile failure of multiaxial 3D woven composites with an open-hole: An experimental and numerical study

2021 ◽  
pp. 114746
Author(s):  
Yifan Zhang ◽  
Mohan Li ◽  
Qiwei Guo ◽  
Xiaolun Sun ◽  
Li Chen
Keyword(s):  
Numerical Study ◽  
Tensile Failure ◽  
Woven Composites ◽  
Open Hole ◽  
3D Woven Composites

scholarly journals Open hole quasi-static and fatigue characterisation of 3D woven composites

2015 ◽  
Vol 131 ◽  
pp. 765-774 ◽  
Author(s):  
S. Dai ◽  
P.R. Cunningham ◽  
S. Marshall ◽  
C. Silva
Keyword(s):  
Woven Composites ◽  
Open Hole ◽  
3D Woven Composites

On the tensile failure of 3D woven composites

1996 ◽  
Vol 27 (6) ◽  
pp. 447-458 ◽  
Author(s):  
Brian N. Cox ◽  
Mahyar S. Dadkhah ◽  
W.L. Morris
Keyword(s):  
Tensile Failure ◽  
Woven Composites ◽  
3D Woven Composites

Determination of Triaxial Tensile Failure Surfaces for Curing Epoxy Resins

2013 ◽  
Vol 577-578 ◽  
pp. 257-260
Author(s):  
Todd Gross ◽  
Jordan Kusch ◽  
Igor Tsukrov
Keyword(s):  
Thermal Expansion ◽  
Tensile Stress ◽  
Coefficient Of Thermal Expansion ◽  
Failure Surface ◽  
Tensile Failure ◽  
Woven Composites ◽  
Temperature State ◽  
Stress Surface ◽  
3D Woven Composites ◽  
The Difference

Microcracking is often observed in the resin pockets of as-cured 3D woven composites with significant through-the-thickness fiber constraint. The resin is subjected to a triaxial tensile stress during cooling due to thermal expansion mismatch and shrinkage during curing. However, the temperature dependence of the failure surface for resins subjected to triaxial tensile stress is not known and there is no standard measurement method for applying a triaxial tensile stress. We have developed a novel method for measuring the triaxial tensile failure stress surface by confining the shrinkage of the resin to tubes of different thicknesses and made of materials with different thermal expansion coefficient. The difference in thermal contraction and shrinkage between the resin and the confining tube subjects the resin to a triaxial tensile stress during cooling and curing. We vary the stress-temperature state by selecting tubes with different coefficient of thermal expansion. We infer the stress in the resin from the deflections of the tube measured by a high resolution dilatometer assuming that the tube is a linear elastic, thick-walled pressure vessel.

Experimental and numerical investigation of open-hole tensile properties and damage mechanisms of 3D woven composites under weft-loading

2021 ◽  
Vol 161 ◽  
pp. 107455
Author(s):  
Qiwei Guo ◽  
Yifan Zhang ◽  
Diansen Li ◽  
Qingtao Lv ◽  
Xiaolun Sun ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Numerical Investigation ◽  
Woven Composites ◽  
Damage Mechanisms ◽  
Open Hole ◽  
3D Woven Composites

Microscopic residual stresses analysis and multi-objective optimization for 3D woven composites

2021 ◽  
Vol 144 ◽  
pp. 106310
Author(s):  
Qi Wang ◽  
Xufeng Yang ◽  
Haixin Zhao ◽  
Xiaowen Zhang ◽  
Guanglong Cao ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Woven Composites ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
3D Woven Composites

Comparison of progressive damage simulation of 3D woven composites between voxel and conformal discretization models

2021 ◽  
pp. 103860
Author(s):  
Tao Zheng ◽  
Licheng Guo ◽  
Ziheng Tang ◽  
Tongtong Wang ◽  
Zhixing Li
Keyword(s):  
Woven Composites ◽  
Progressive Damage ◽  
3D Woven Composites ◽  
Damage Simulation

EXPERIMENTALLY VALIDATED SIMULATIONS OF BLIND HOLE DRILLING IN 3D WOVEN CARBON/EPOXY COMPOSITE WITH PROCESSING-INDUCED RESIDUAL STRESSES

2021 ◽  
Author(s):  
ARTURO LEOS ◽  
KOSTIANTYN VASYLEVSKYI ◽  
IGOR TSUKROV ◽  
TODD GROSS ◽  
BORYS DRACH
Keyword(s):  
Residual Stresses ◽  
Epoxy Matrix ◽  
Mechanical Performance ◽  
Matrix Cracking ◽  
Woven Composites ◽  
Hole Drilling ◽  
Blind Hole ◽  
Matrix Cracks ◽  
Numerical Predictions ◽  
3D Woven Composites

Manufacturing-induced residual stresses in carbon/epoxy 3D woven composites arise during cooling after curing due to a large difference in the coefficients of thermal expansion between the carbon fibers and the epoxy matrix. The magnitudes of these stresses appear to be higher in composites with high throughthickness reinforcement and in some cases are sufficient to lead to matrix cracking. This paper presents a numerical approach to simulation of development of manufacturing-induced residual stresses in an orthogonal 3D woven composite unit cell using finite element analysis. The proposed mesoscale modeling combines viscoelastic stress relaxation of the epoxy matrix and realistic reinforcement geometry (based on microtomography and fabric mechanics simulations) and includes imaginginformed interfacial (tow/matrix) cracks. Sensitivity of the numerical predictions to reinforcement geometry and presence of defects is discussed. To validate the predictions, blind hole drilling is simulated, and the predicted resulting surface displacements are compared to the experimentally measured values. The validated model provides an insight into the volumetric distribution of residual stresses in 3D woven composites. The presented approach can be used for studies of residual stress effects on mechanical performance of composites and strategies directed at their mitigation.

Modeling strategies of 3D woven composites: A review

2011 ◽  
Vol 93 (8) ◽  
pp. 1947-1963 ◽  
Author(s):  
Mahmood Ansar ◽  
Wang Xinwei ◽  
Zhou Chouwei
Keyword(s):  
Woven Composites ◽  
3D Woven Composites

Mesh generation and geometrical modelling of 3D woven composites with variable tow cross-sections

2012 ◽  
Vol 51 (1) ◽  
pp. 103-111 ◽  
Author(s):  
E. Potter ◽  
S.T. Pinho ◽  
P. Robinson ◽  
L. Iannucci ◽  
A.J. McMillan
Keyword(s):  
Cross Sections ◽  
Mesh Generation ◽  
Woven Composites ◽  
Geometrical Modelling ◽  
3D Woven Composites
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