Effect of negative Poisson's ratio on mechanical response and damage behavior of carbon/epoxy composite laminates under low-velocity impact

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Saremian Reza; Jamal Omidi Majid; Pirkandi Jamasb; Nabavi Seyed Mehdi; Jahromi Mehdi

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Journal Paper

Paper Information

Journal: Journal of Science and Technology of Composites Year:2024 | Volume:11 | Issue:1 Page(s): 2429-2443

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Title

Effect of negative Poisson's ratio on mechanical response and damage behavior of carbon/epoxy composite laminates under low-velocity impact

Author(s)

Keywords

Auxetic composite laminates

Negative Poisson’s ratio

finite element analysis

Low-velocity Impact

Abstract

In this paper, the effect of negative Poisson's ratio on the mechanical response and improving the damage behavior of carbon/epoxy composite laminates under Low-velocity Impact is studied. For this purpose, a MATLAB code is developed to determine the range of sequence angles to achieve both negative Poisson's ratio in-plane and through-thickness based on CLT. Also, the progressive damage model is written and implemented using the user-material subroutine-VUMAT consisting of Hashin and Puck failure criteria and the damage evolution model based on the equivalent-strain method to predict the initiation and evolution of damage for matrix and fiber. In the research process, the impact resistance performance of auxetic laminates is evaluated in comparison with composite laminates with positive Poisson's ratio with cross-ply and angle-ply sequences. The results showed that in some damage modes, auxetic behavior can lead to the improvement of composite laminate damage. Based on the analysis of the results, the highest damage amount of delamination, matrix tension, matrix compression, and fiber tension damage is observed in angle-ply, through-thickness auxetic, cross-ply, and through-thickness auxetic laminates, respectively. Meanwhile, cross-ply, angle-ply, and through-thickness auxetic laminates with characteristics such as high impact force, low impact time, low maximum displacement, and less dissipated energy than in-plane auxetic laminate are suitable for use in structures with hardwall design approach. Also, the in-plane auxetic laminate with features such as low impact force, high impact time, high displacement, and more dissipated energy than other composite laminates, is practical and operational for use in sacrificial structures.

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