Simulation of Drop-Weight Impact Test on Composite Laminates using Finite Element Method

Date

2019-01-01

Author

Bozkurt, Mirac Onur
Parnas, Kemal Levend
Çöker, Demirkan

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This study presents the simulation of standard drop-weight impact test on a [0/90/0]s composite laminate. For this purpose, a three-dimensional virtual test setup is developed in ABAQUS/Explicit finite element tool. Hemispherical impactor and specimen fixture are modeled as rigid bodies. Composite plate is modeled as a 3-D deformable solid and discretized using a biased mesh for computational efficiency. For simulation of ply damage in the composite laminate, a continuum damage mechanics based damage model is developed and implemented into the analysis via a user-written subroutine VUMAT. Delamination damage is simulated by inserting cohesive elements at the interfaces of plies having different orientations. Results show that the initial failure mechanism in the 3-D low-velocity impact event is the matrix cracking in the lowermost plies independent from the stacking sequence of the laminate. Furthermore, the simulation accurately predict that delaminated regions expand mainly in the same direction as of the fibers of the lower adjacent layer in accordance with the bending stiffness mismatching concept.

Subject Keywords

Drop-weight impact, Finite element analysis, Composite, Matrix crack, Delamination, Delamination

URI

https://linkinghub.elsevier.com/retrieve/pii/S2452321619305773
https://hdl.handle.net/11511/85328

Collections

Department of Aerospace Engineering, Article