Journal of Science and Technology of Composites

Journal of Science and Technology of Composites

Sensitivity of the impact behavior of multi-layered metal laminates to the position of material parameters variations

Document Type : Research Paper

Authors
Hadi Khoramishad
Meysam Khodaei
Mohammad Bagheri Tofighi
School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran.
Abstract
The possibility of using different materials for different layers of adhesively bonded metal laminate (ABML) structures is an important advantage over the monolithic structures which facilitate smart design of the metal laminate structures. Therefore, studying the effects of the material parameters of the metal layers on mechanical behavior of ABML under various loading conditions seems to be necessary. In this paper, a finite element model was developed to study the elastic-plastic behavior of ABML under low-velocity impact loadings. This model was very well validated against the experimental and other numerical results. The effects of the material parameters including the Young's modulus and the yield stress of different layers on the impact responses of the ABML structure were investigated numerically. The contact force, the transverse displacement, the plastic strain energy, the elastic strain energy and the impactor's kinetic energy were considered in this paper as the major impact responses. Al 6061 was selected as the base material. The Young's modulus and the yield stress of the base material were varied to form artificial materials for studying the corresponding effects on the impact responses of the ABML plates. The ABML plates with various stacking sequences of the base and artificial materials were modeled to study both the effect of varying material parameters and the position of the material parameters variations on the impact behaviors of ABML. The results indicated that the impact responses of the ABML plate were much more sensitive to the material characteristics of the top and bottom metal layers than the middle layers due to the bending effects. Moreover, the material parameters of the top metal layer is more influencing on the impact responses of the ABML plates due to the local deformations.
Keywords
Multi-layered metal laminate
Finite element analysis
Strain energy
Low velocity impact loading
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