Matrix damage, involving transverse and shear cracks, is a common failure mode for composite structures, yet little is known concerning their interaction. A modified Iosipescu coupon is proposed to study the evolution of the shear and transverse damage and their mutual effects. The layup and coupon geometry were selected in a way that controls the severity of the damage and allows the measurement of shear and transverse stiffness degradation directly. The results were compared to material degradation models where damage was dominated by matrix failure. While positive agreement was generally observed in the transverse direction, no model was able to predict the observed shear damage. A new elasticity solution was, therefore, proposed for the shear stress-strain field of a transversely cracked laminate. The approach used a classical shear lag theory with friction applied to the crack surfaces. Using the constitutive relations, the shear modulus reduction was found as a function of crack density, and showed good agreement with experimental measures.
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ASME 2013 International Mechanical Engineering Congress and Exposition
November 15–21, 2013
San Diego, California, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5638-3
PROCEEDINGS PAPER
Shear Modulus Degradation in Fiber Reinforced Laminates Available to Purchase
M. Salavatian,
M. Salavatian
Washington State University, Pullman, WA
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L. V. Smith
L. V. Smith
Washington State University, Pullman, WA
Search for other works by this author on:
M. Salavatian
Washington State University, Pullman, WA
L. V. Smith
Washington State University, Pullman, WA
Paper No:
IMECE2013-63035, V009T10A001; 6 pages
Published Online:
April 2, 2014
Citation
Salavatian, M, & Smith, LV. "Shear Modulus Degradation in Fiber Reinforced Laminates." Proceedings of the ASME 2013 International Mechanical Engineering Congress and Exposition. Volume 9: Mechanics of Solids, Structures and Fluids. San Diego, California, USA. November 15–21, 2013. V009T10A001. ASME. https://doi.org/10.1115/IMECE2013-63035
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