Non-linear material characterization and numerical modeling of cross-ply basalt/epoxy laminate under low velocity impact |
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Affiliation: | 3. Department of Mechanical Engineering, Indian Institute of Technology Jammu, India;1. School of Mechanical Engineering, KIIT, Bhubaneswar 751024, Odisha, India;2. Department of Mechanical Engineering, NIT, Rourkela 769008, Odisha, India;1. Department of Applied Mechanics, Indian Institute of Technology Delhi, New Delhi, India;2. Department of Wind Energy, Technical University of Denmark, Roskilde, Denmark |
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Abstract: | The low velocity impact behavior of basalt/epoxy composites, seen as an eco-friendly replacement of glass-epoxy composites, has not been studied systematically so far. Here, the elastic elasto-plastic properties, strengths, intralaminar and interlaminar fracture energies were determined. The intralaminar energies were determined using compact tension and compression tests. The elasto-plastic properties needed in the plastic potential were determined using off-axis test. These properties are used in Finite Element (FE) code with an elasto-plastic damage model developed earlier to simulate the impact response of cross-ply laminates basalt/epoxy laminates. Low velocity impact (LVI) experiments at 10 J, 20 J and 30 J are performed on these composites. The FE simulation is successful in capturing force, energy, deflection histories and damage zones showing a close match to the experiments. A comparison of impact force history and damage area (ultrasonic C-scan) of basalt-epoxy laminates with glass epoxy laminates having same volume fraction shows nearly similar peak forces but the major axis of the ellipsoidal damage zone was bigger in glass/epoxy laminates. |
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Keywords: | Polymer-matrix composites (PMCs) Impact behavior Damage mechanics Mechanical testing |
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