scholarly journals Effect of low velocity impact on residual compressive strength of stiffened panel with welding residual stress

2021 ◽  
Vol 2012 (1) ◽  
pp. 012022
Author(s):  
Hui Liu ◽  
Zhenkun Lei ◽  
Zhenfei Guo ◽  
Hao Jiang ◽  
Ruixiang Bai
Keyword(s):  
Residual Stress ◽  
Compressive Strength ◽  
Welding Residual Stress ◽  
Low Velocity Impact ◽  
Stiffened Panel ◽  
Low Velocity ◽  
Velocity Impact ◽  
Residual Compressive Strength

Impact Damage Research of Sandwich Composite Laminates

2013 ◽  
Vol 710 ◽  
pp. 136-141
Author(s):  
Li Jun Wei ◽  
Fang Lue Huang ◽  
Hong Peng Li
Keyword(s):  
Compressive Strength ◽  
Composite Laminates ◽  
Impact Damage ◽  
Low Velocity Impact ◽  
Sandwich Composite ◽  
Low Velocity ◽  
Compression Process ◽  
Velocity Impact ◽  
Residual Compressive Strength ◽  
Core Materials

Sandwich composite laminates structure is a classic application of composite material on actual aircraft structural. Dealing with low-velocity impact damage and residual compressive strength of sandwich composite laminates, explicit finite element method of ABAQUS/Explicit software was adopted to simulate low-velocity impact and compression process. Impact response and invalidation on compression between sandwich composite laminates with different core materials and regular composite laminates were compared. The simulation results indicated that softer core materials can absorb more impact energy, reduce the structure damage and enhance the residual compressive strength after impact.

Study on the Residual Compressive Strength of a Composite Sandwich Panel with Foam Core after Low Velocity Impact

2012 ◽  
Vol 430-432 ◽  
pp. 484-487 ◽  
Author(s):  
Zong Hong Xie ◽  
Jiang Tian ◽  
Jian Zhao ◽  
Wei Li
Keyword(s):  
Compressive Strength ◽  
Failure Criterion ◽  
Sandwich Panel ◽  
Low Velocity Impact ◽  
Foam Core ◽  
Low Velocity ◽  
Velocity Impact ◽  
Residual Compressive Strength ◽  
Composite Sandwich ◽  
The Impact

The residual compressive strength of a foam core sandwich panel after low-velocity impact was studied by using experimental and analytical methods. The test specimens were compressed uniaxially after they were subjected to a low-velocity-impact. From the observation in the test, one can conclude that the subsequent core crushing around the impact region is the major failure mode in the sandwich structure. A failure criterion named Damage Propagation Criterion was proposed to predict the residual compressive load bearing capability of the low-velocity impacted composite sandwich panel. The characteristic value used in this failure criterion can be calculated by an analytical model developed or by conducting the Sandwich Compression after Impact test.

Impact Damage Research of Composite Laminates with AL Ply

2013 ◽  
Vol 710 ◽  
pp. 186-190
Author(s):  
Hong Peng Li ◽  
Fang Lue Huang ◽  
Jin Hai Hu ◽  
Ying Jun Lv
Keyword(s):  
Compressive Strength ◽  
Composite Laminates ◽  
Negative Influence ◽  
Low Velocity Impact ◽  
Equal Weight ◽  
Low Velocity ◽  
Compression Process ◽  
Aircraft Structures ◽  
Residual Compressive Strength ◽  
Finite Element Software

The composite material has been widely used in aircraft structures. But this kind of material has some shortage such as poor impact resistance, low residual compressive strength, which have a negative influence on the performance of aircraft structures. In this paper, simulations of low-velocity impact and compression process of composite laminates with AL ply has been done. Finite element software ABAQUS/Explicit has been adopted to simulate the 3.5J impact and compression. A certain number of composite laminates with different thickness of AL ply has been tested, equal weight traditional composite laminates also been simulated as comparison. The simulation results show that AL ply with certain thickness can improve the residual compressive strength.

scholarly journals Experimental Study on Fibre Reinforced Resin-Based Composite Stiffened Panel with Low Velocity Impact Damage under Shearing Load

2017 ◽  
Vol 26 (3) ◽  
pp. 096369351702600
Author(s):  
Tao An ◽  
Yv Feng ◽  
Yvting He
Keyword(s):  
Failure Modes ◽  
Failure Load ◽  
Impact Damage ◽  
Engineering Application ◽  
Load Test ◽  
Low Velocity Impact ◽  
Stiffened Panel ◽  
Low Velocity ◽  
Velocity Impact ◽  
Composite Stiffened Panel

Drop hammer impact tests on the Fibre Reinforced Resin-Based composite stiffened panels are used to make low velocity impact damage. And then shearing experiments on impacted specimen and intact ones are conducted to obtain the buckling load and failure load. Test results of impacted specimens and intact ones are compared to analyse the effect of damage on the carrying capacity of the structure. The results show that there is no obvious buckling during the tests for two kinds of panels. But the low velocity impact damage on the panel can reduce the failure load of the structure a lot. The failure modes mainly contain damage of four corners, cleaving of skin and deformation of specimen and so on. The experimental results offer some valuable references to engineering application of the structure.

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