Low-velocity impact and residual tensile strength analysis to carbon fiber composite laminates |
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Authors: | Shi-Xun Wang Lin-Zhi Wu Li Ma |
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Affiliation: | aCenter for Composite Materials, Harbin Institute of Technology, Harbin 150001, China |
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Abstract: | In this paper, low-velocity impact characteristics and residual tensile strength of carbon fiber composite laminates are investigated by experimentally and numerically. Low-velocity impact tests and residual tensile strength tests are performed using an instrumented drop-weight machine (Instron 9250HV) and static test machine (Instron 5569), respectively. The finite element (FE) software, ABAQUS/Explicit is employed to simulate low-velocity impact characteristics and predict residual tensile strength of carbon fiber composites laminates. These numerical investigations create a user-defined material subroutine (VUMAT) to enhance the damage simulation which includes Hashin and Yeh failure criteria. The impact contact force and the tensile strength are accurately estimated using the present method. Two different tensile damage modes after different impact energies are observed. The degradation of residual tensile strengths can be divided to three stages for different impact energies, and amplitudes of degradation are affected by stacking sequences. |
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Keywords: | Composite laminates Low-velocity impact Residual tensile strength |
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