Modares Mechanical Engineering

Modares Mechanical Engineering

Experimental and Numerical Analysis of High Velocity Impact on 2-Layer kevlar/Elastomer Composite

Document Type : Original Research

Authors
seyedeh samaneh asemani 1
Gholamhossein Liaghat 2
H. Ahmadi 3
Yavar Anani 4
Amin khodadadi 5
1 PhD student
2 Professor
3 Assistant professor
4 Post Doctorate
5 phd
Abstract
In this study, the energy absorption capacity of kevlar/elastomer composites under high-speed impact loading has been investigated experimentally and numerically. The compliance of the mechanical behavior of elastomeric composites with the theory of hyperelasticity will complicate the analytical study. Therefore, numerical simulation due to the different and complex mechanisms of failure, has gained the largest share in the design of composite structures. In the present study, the most advanced method of modeling the finite element of composites Abaqus / Explicit has been used to determine their behavior during impact impact. For this purpose, planer shell elements were used to model the composite layers and to determine the behavior of the elastomeric composite failure model, the material model of the formable material and the material model of the vumat were used based on one of the damage criteria such as von mises stress. Due to the lack of criteria mentioned in the commercial versions of the software and the importance of considering such damages in numerical simulation for these composites, the criterion was written using coding in the Fortran software environment and the analysis of the penetration phenomenon in composite structure was added to the software capability. In order to validate this model, an experimental test was performed on the kevlar/elastomer composite by a Gas gun device. Also, the study of deformation and output velocity projectile and absorpted energy have been reported as results. The simulation results show a very good agreement with the experimental results.
Keywords
Elastomeric composite
high-speed impact
energy absorption
Failure mechanism
Numerical analysis

Subjects

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Modares Mechanical Engineering
Volume 20, Issue 12
November 2020
Pages 2733-2745