In situ strength analysis of cross‐ply composite laminates containing defects and interleaved woven layer using a computational micromechanics approach

2021 ◽  
Author(s):  
Alireza Rafie ◽  
Hamidreza Madadi ◽  
Amin Farrokhabadi ◽  
Miguel Herráez
Keyword(s):  
Composite Laminates ◽  
Strength Analysis ◽  
Computational Micromechanics

scholarly journals Residual Strength Analysis Method for Composite Laminates with Internal Defects Using a Quasi-Three-Dimensional Model.

1993 ◽  
Vol 59 (563) ◽  
pp. 1697-1701 ◽  
Author(s):  
Tsuyoshi Nishiwaki ◽  
Atsushi Yokoyama ◽  
Zen'ichiro Maekwa ◽  
Hiroyuki Hamada ◽  
Yoshinori Maekawa ◽  
...  
Keyword(s):  
Residual Strength ◽  
Composite Laminates ◽  
Three Dimensional ◽  
Strength Analysis ◽  
Analysis Method ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Internal Defects

SELF-HEALING OF WOVEN COMPOSITE LAMINATES VIA IN SITU THERMAL REMENDING

2021 ◽  
Author(s):  
ALEXANDER D. SNYDER ◽  
ZACHARY J. PHILLIPS ◽  
JASON F. PATRICK
Keyword(s):  
Composite Laminates ◽  
Composite Laminate ◽  
Laminated Composites ◽  
Reaction Times ◽  
Carbon Fiber Composites ◽  
Self Healing ◽  
Damage Mode ◽  
Woven Composite ◽  
Internal Damage

Fiber-reinforced polymer composites are attractive structural materials due to their high specific strength/stiffness and excellent corrosion resistance. However, the lack of through-thickness reinforcement in laminated composites creates inherent susceptibility to fiber-matrix debonding, i.e., interlaminar delamination. This internal damage mode has proven difficult to detect and nearly impossible to repair via conventional methods, and therefore, remains a significant factor limiting the reliability of composite laminates in lightweight structures. Thus, novel approaches for mitigation (e.g., self-healing) of this incessant damage mode are of tremendous interest. Self-healing strategies involving sequestration of reactive liquids, i.e. microcapsule and microvascular systems, show promise for the extending service- life of laminated composites. However, limited heal cycles, long reaction times (hours/days), and variable stability of chemical agents under changing environmental conditions remain formidable research challenges. Intrinsic self- healing approaches that utilize reversible bonds in the host material circumvent many of these limitations and offer the potential for unlimited heal cycles. Here we detail the development of an intrinsic self-healing woven composite laminate based on thermally-induced dynamic bond re-association of 3D-printed polymer interlayers. In contrast to prior work, self-repair of the laminate occurs in situ and below the glass-transition temperature of the epoxy matrix, and maintains >85% of the elastic modulus during healing. This new platform has been deployed in both glass and carbon-fiber composites, demonstrating application versatility. Remarkably, up to 20 rapid (minute-scale) self-healing cycles have been achieved with healing efficiencies hovering 100% of the interlayer toughened (4-5x) composite laminate. This latest self-healing advancement exhibits unprecedented potential for perpetual in-service repair along with material multi-functionality (e.g., deicing ability) to meet modern application demands.

scholarly journals In-situ pull-off of ZnO nanowire from carbon fiber and improvement of interlaminar toughness of hierarchical ZnO nanowire/carbon fiber hydrid composite laminates

Carbon ◽  
2016 ◽  
Vol 110 ◽  
pp. 69-78 ◽  
Author(s):  
Nan Zheng ◽  
Yudong Huang ◽  
Weifu Sun ◽  
Xusheng Du ◽  
Hong-Yuan Liu ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Composite Laminates ◽  
Zno Nanowire
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