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Evaluation of Compression Strength After Low Velocity Impact

NATHAN SESAR, GREYSON HODGES, MARK PANKOW

Abstract


Damage due to impacts is a large concern for composites use in the aerospace industry. Low Velocity Impact (LVI) damage can significantly reduce the in-plane strength of laminated composites, and understanding how they behave after such damage occurs is important for predicting the failure of these composites. LVI will cause damage to a structure called Barely Visible Impact Damage (BVID) due to the internal delaminations and transverse cracks that form in the laminate. BVID can result in a loss of up to 40% of the in-plane residual strength of a composite. This paper explores the effects of the different stacking sequences and LVI energies on the Compression Strength After Impact (CSAI) strength of the composite, along with producing high fidelity data to map the deformation and damage and compare to progressive damage and failure analysis methods.


DOI
10.12783/asc33/25924

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