Nonlinear low-velocity impact analysis of temperature-dependent nanotube-reinforced composite plates

2014 ◽  
Vol 108 ◽  
pp. 423-434 ◽  
Author(s):  
Zhen-Xin Wang ◽  
Jifeng Xu ◽  
Pizhong Qiao
Keyword(s):  
Impact Analysis ◽  
Composite Plates ◽  
Low Velocity Impact ◽  
Temperature Dependent ◽  
Low Velocity ◽  
Velocity Impact ◽  
Reinforced Composite

Effects of Piezoelectric Actuation on Delamination in Transversely Loaded Composite Plates

2015 ◽  
Vol 1115 ◽  
pp. 560-563
Author(s):  
Nazwan Ghazali ◽  
Mohamed Shaik Dawood ◽  
S.M. Kashif
Keyword(s):  
Composite Laminates ◽  
Impact Load ◽  
Composite Plates ◽  
Low Velocity Impact ◽  
Piezoelectric Actuation ◽  
Low Velocity ◽  
Fiber Failure ◽  
Velocity Impact ◽  
Reinforced Composite ◽  
Poor Tolerance

Fiber reinforced composite materials are known to have poor tolerance to impact loads. Damages can be observed in the forms of matrix crack, fiber failure and delamination. In the case of low velocity impact, delamination is often a major concern due to its hidden nature. In this work, the effects of piezoelectric actuation on delamination in composite plates subjected to low velocity impact have been studied using LS-DYNA. It was found that, piezoelectric actuators can be used to reduce delamination in composite laminates. This was achieved by actuating the laminate to curve in the opposite direction of the incoming impact load.

scholarly journals Study on Low-Velocity Impact Damage and Residual Strength of Reinforced Composite Skin Structure

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2573
Author(s):  
Hanhua Li ◽  
Qiuhua Zhang ◽  
Jiale Jia ◽  
Chunming Ji ◽  
Bing Wang ◽  
...  
Keyword(s):  
Impact Damage ◽  
Composite Plates ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Intact Specimen ◽  
Velocity Impact ◽  
Reinforced Composite ◽  
Load Carrying ◽  
Ultimate Load Carrying Capacity ◽  
The Impact

In order to better understand the damage tolerance of reinforced composite plates, the impact damage of the reinforced composite plates was investigated under low-velocity impact test. The experimental results show that the impact of different positions and energies causes different degrees of damage to the specimens, including but not limited to ply fracture, internal delamination of the skin, and debonding of the stiffeners and skin. After impacting, the specimens were tested in an axial compression. The results show that the ultimate bearing capacity of the specimen is also affected by different forms of impact. The impact point has the greatest influence on the specimen while it locates at the intersection of longitudinal and transverse bars. Compared with the intact specimen, the ultimate load carrying capacity was reduced by 16.83% and 44.02%, while the specimen impacted by 15 J and 30 J, respectively. The compression failure mode of the damaged specimen is mainly the breakage of the stiffeners and the delamination of the skin.

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