Experimental investigation of composite laminates subject to low-velocity edge-on impact and compression after impact

2018 ◽  
Vol 186 ◽  
pp. 335-346 ◽  
Author(s):  
Solver I. Thorsson ◽  
Sunil P. Sringeri ◽  
Anthony M. Waas ◽  
Brian P. Justusson ◽  
Mostafa Rassaian
Keyword(s):  
Experimental Investigation ◽  
Composite Laminates ◽  
Low Velocity ◽  
Compression After Impact

Experimental investigation on damage mechanisms and buckling behaviors of thin composite laminates in compression after impact

2021 ◽  
Vol 256 ◽  
pp. 113122
Author(s):  
Xin Wang ◽  
Jun Huang ◽  
Riming Tan ◽  
Yuru Su ◽  
Zhidong Guan ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Composite Laminates ◽  
Damage Mechanisms ◽  
Compression After Impact

Numerical Simulation of Compression-After-Impact Process of Composite Laminates

2012 ◽  
Vol 525-526 ◽  
pp. 265-268
Author(s):  
Biao Li ◽  
Ya Zhi Li ◽  
Xi Li ◽  
Zhen Hua Yao
Keyword(s):  
Composite Laminates ◽  
Element Model ◽  
Low Velocity Impact ◽  
Cohesive Elements ◽  
Low Velocity ◽  
Velocity Impact ◽  
Impact Process ◽  
Compression After Impact ◽  
Out Of Plane ◽  
Plane Compression

The residual compressive strength of composite laminates subjected to low-velocity impact (CAI) was analyzed using the ABAQUS/Explicit package through a two-step calculation. The finite element model was composed of solid elements and interfacial cohesive elements. The out of plane low-velocity impact process was simulated in the first step and the results of which were taken as the input for the second step of the in-plane compression, until the collapse of the laminate. The usefulness of the explicit solution algorithm in dealing with the quasi-static procedure of the in-plane compression was investigated by examining the effect of different initial velocities of the compression loading on CAI values. The simulation results agree well with the experimental results.

Evaluation of Impact Damage Resistance in Laminated Composites Using Resins with Different Crosslink Densities

1996 ◽  
Vol 434 ◽  
Author(s):  
A. J. Lesser
Keyword(s):  
Fracture Toughness ◽  
Molecular Weight ◽  
Composite Laminates ◽  
Impact Damage ◽  
Laminated Composites ◽  
Resin Matrix ◽  
Low Velocity ◽  
Compression After Impact ◽  
Overall Resistance ◽  
The Impact

AbstractIt is generally recognized that fiber-reinforced laminated composites are susceptible to damage resulting from low-velocity impacts. Over recent years, many strategies have been devised to increase the fracture toughness of resin matrix materials with the aim of improving the composites overall resistance to impact damage. One popular strategy for enhancing the fracture toughness of thermosets involves increasing its molecular weight between crosslinks which, in turn, enhances the resins ductility. In this paper, we investigate the efficiency of this toughening approach with regard to resisting damage in composite laminates subjected to lowvelocity impacts. Generic damage characteristics and mechanisms are reviewed and it is shown that two different events occur during the impact process. First, the laminate experiences a local failure which resembles a Hertzian fracture process followed by subsequent delamination between the plies. Results are presented illustrating the effects that systematically increasing the molecular weight between crosslinks of the resin has on each of these mechanisms. Also, the residual compressive strength (Compression After Impact) of the laminates made with these resins is presented.

Modelling damage evolution and CAI strength of composite laminates under biaxial compression

2021 ◽  
pp. 002199832199842
Author(s):  
Bin Yang ◽  
Kunkun Fu ◽  
Yan Li
Keyword(s):  
Residual Strength ◽  
Composite Laminates ◽  
Failure Modes ◽  
Compressive Loading ◽  
Element Model ◽  
Low Velocity Impact ◽  
Biaxial Compression ◽  
Low Velocity ◽  
Damage Initiation ◽  
Compression After Impact

In this paper, a finite element model (FEM) was developed to investigate failure mechanism and compression after impact (CAI) strength of woven carbon fibre reinforced polymer (CFRP) after low-velocity impact (LVI) subjected to biaxial compressive loading. A built-in VUMAT user-defined material subroutine was adopted to take into account the in-plane damage and intralaminar delamination under LVI loading and in-plane compression. The LVI response, failure pattern, and residual mechanical properties under uniaxial compression were compared to the available experimental data to verify the numerical model. The damage initiation, subsequent evolution, final failure modes, and residual strength of the composite laminates with LVI damages subjected to biaxial compressive loading are presented by numerical methods, and the effects of impact energy and impactor diameter on the residual strength of the laminates are discussed.

Studies on Low-Velocity Impact Damage of Metal Ion Implanted Composite Laminates

2011 ◽  
Vol 311-313 ◽  
pp. 37-42
Author(s):  
Li Yan ◽  
Xue Feng An ◽  
Hai Chao Cui ◽  
Xiao Su Yi
Keyword(s):  
Ion Implantation ◽  
Composite Laminates ◽  
Metal Ion ◽  
Impact Damage ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Compression After Impact ◽  
Dent Depth ◽  
Metal Ion Implantation

composite laminates, metal ion implantation, low-velocity impact damage, BVID Abstract. Metal ion implantation was carried out on composite laminates to modify the surface properties, so that after low-velocity impact barely visible impact damage (BVID) was easy to realize. Surface topography of laminates was observed by SEM. Microhardness and drop-weight impact was tested on composite laminates. The results showed that after metal ion implantation microhardness of laminates increased obviously and resin was easy to generate plastic deforming. Dent depth had been improved so as to realize visible impact damage more easily. And compression-after-impact (CAI) had not decreased. Comparison with Ti ion implantation, Cu ion implantation had better influence on realizing visible impact damage (VID).

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