Comparison of laminate thickness on the low velocity impact behaviors for Z-pinned composite laminates

2021 ◽  
pp. 106567
Author(s):  
Binbin Liao ◽  
Jianwu Zhou ◽  
Shigang Ai ◽  
Yuan Lin ◽  
Li Xi ◽  
...  
Keyword(s):  
Composite Laminates ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Laminate Thickness

Delamination Threshold Load of Composite Laminates under Low-Velocity Impact

2012 ◽  
Vol 525-526 ◽  
pp. 521-524
Author(s):  
Y.G. Xu ◽  
Z. Shen ◽  
W. Tiu ◽  
Y.Z. Xu ◽  
Yong K. Chen ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Composite Laminates ◽  
Impact Damage ◽  
Energy Levels ◽  
Low Velocity Impact ◽  
Thickness Effect ◽  
Low Velocity ◽  
Velocity Impact ◽  
Key Factor ◽  
Laminate Thickness

A key factor affecting the use of carbon fibre reinforced composite laminates is the low velocity impact damage which may be introduced accidentally during manufacture, operation or maintenance of the component. Among the several barely visible impact damages, interlaminar delamination is the dominant failure mode and may reduce the post-impact compressive strength of the component significantly. This paper focuses on the study of the delamination threshold load (DTL) above which significant increase of delamination and thus large reduction of the residual compressive strength of the component may occur. Instrumented drop weight tests were carried out under various impact energy levels to determine the delamination threshold load. Efforts are directed to the study of the laminate thickness effect on the reliability of the detection of the DTL. The validity of the concept of DTL has been investigated and possible implications on the measurement of the DTL has been discussed. It is demonstrated that DTL exists but its detection requires proper testing conditions.

scholarly journals Impact Response and Energy Distribution of Low Velocity Impact on Composite Laminates

2018 ◽  
Vol 74 (10) ◽  
pp. 207-214
Author(s):  
Bin Zhou ◽  
Xiaopeng Shi ◽  
Lei Wang ◽  
Junjie Yin ◽  
Yue Liu ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Composite Laminates ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact

scholarly journals A progressive damage model of composite laminates under low-velocity impact

2021 ◽  
Vol 39 (1) ◽  
pp. 37-45
Author(s):  
Junjie Zhou ◽  
Shengnan Wang
Keyword(s):  
Composite Laminates ◽  
Impact Force ◽  
Damage Model ◽  
Low Velocity Impact ◽  
Progressive Damage ◽  
Low Velocity ◽  
Damage Development ◽  
Velocity Impact ◽  
Progressive Damage Model ◽  
Matrix Damage

In this paper, a progressive damage model for studying the dynamic mechanical response and damage development of composite laminates under low-velocity impact was established. The model applied the Hashin and Hou failure criteria to predict the initiation of intra-laminar damage (fiber and matrix damage); a linear degradation scheme combined with the equivalent displacement method was adopted to simulate the damage development; a cohesive zone model with the bilinear traction-separation relationship was used to predict delamination. A user material subroutine VUMAT was coded, and the simulation analysis of carbon fiber reinforcement composite laminates subjected to 25 J impact was performed via commercial software ABAQUS. The predicted impact force-time curve, impact force-displacement curve, and damage distribution contours among the layers were in a good agreement with the experimental, which verified the proposed model. According to the simulation results, the fiber damage and matrix damage were analyzed, and the expansion of delamination was discussed.

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