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High-fidelity Numerical Prediction of the Compressive Strength of Laminated Composites after Low Velocity Impact

SHIYAO LIN, ANTHONY M. WAAS

Abstract


Carbon fiber laminated composites are vulnerable to impact loading and the damage induced by low velocity impact (LVI) is distributed within the material without significant external indicators. The internal damage can cause significant knock down of the post-impact compressive strength and by industrial standards, compression strength after impact (CSAI) tests are usually performed to evaluate the degradation of the compressive strength. In this paper, the CSAI tests were carried out and in-situ 2D digital image correlation was done to measure the deformation. Computational predictions of the CSAI strength were performed based on the numerical results obtained from prior LVI predictions. Three commonly used stacking sequences were studied to demonstrate the versatility of the computational model. The computational results were verified with the experimental data and the computational model was validated to be sufficiently accurate and efficient.


DOI
10.12783/asc34/31276

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