Prediction of Low-Velocity Face-on Impact Response and Compression after Impact (CAI) of Composite Laminates using EST and Cohesive Modeling (DCZM)

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.

Download Full-text

A comparative study on low-velocity impact response of fabric composite laminates

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2013.03.044 ◽

2013 ◽

Vol 50 ◽

pp. 750-756 ◽

Cited By ~ 61

Author(s):

Diantang Zhang ◽

Ying Sun ◽

Li Chen ◽

Ning Pan

Keyword(s):

Comparative Study ◽

Composite Laminates ◽

Impact Response ◽

Low Velocity Impact ◽

Low Velocity ◽

Velocity Impact ◽

Fabric Composite

Download Full-text

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

MRS Proceedings ◽

10.1557/proc-434-293 ◽

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.

Download Full-text

Analytical and experimental studies on the low-velocity impact response and damage of composite laminates under in-plane loads with structural damping effects

Composites Science and Technology ◽

10.1016/j.compscitech.2010.05.007 ◽

2010 ◽

Vol 70 (10) ◽

pp. 1513-1522 ◽

Cited By ~ 23

Author(s):

Ik-Hyeon Choi ◽

In-Geol Kim ◽

Seok-Min Ahn ◽

Chan-Hong Yeom

Keyword(s):

Composite Laminates ◽

Experimental Studies ◽

Impact Response ◽

Low Velocity Impact ◽

Structural Damping ◽

Low Velocity ◽

Velocity Impact ◽

Damping Effects

Download Full-text

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

Journal of Composite Materials ◽

10.1177/0021998321998426 ◽

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.

Download Full-text