A creep damage model is presented that allows for anisotropic distributions of damage in composite materials. An earlier model by the writers allowed for anisotropic damage growth rate but, based on a scalar state variable, failed to account for anisotropic distributions of damage. A vectorial state variable is introduced that allows a representation of anisotropic damage distribution. As in earlier work, a fundamental assumption is that the principally damaging stress components are tensile traction and longitudinal shear at the fiber/matrix interface. Application of the creep damage model is made to calculations involving homogenously stressed composite elements under transverse tensile and longitudinal shear stress and to cross plied thin-walled tubes under tension/torsion. Although the emphasis is phenomenological, with focus on a mathematical structure for representing anisotropic distributions of damage, a meaningful creep damage model must rest on fundamental material science and microstructural examination. Verification experiments involving tension/torsion testing of thin-walled composite tubes together with detailed microstructural examination are discussed and outlined.
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e-mail: wbinienda@uakron.edu
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July 2005
Technical Papers
A Representation of Anisotropic Creep Damage in Fiber Reinforced Composites
D. N. Robinson,
D. N. Robinson
Professor Emeritus
Civil Engineering Department,
e-mail: drobins7@tampabay.rr.com
The University of Akron
, Akron, OH 44325-3905
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W. K. Binienda
W. K. Binienda
Professor
Civil Engineering Department,
e-mail: wbinienda@uakron.edu
The University of Akron
, Akron, OH 44325-3905
Search for other works by this author on:
D. N. Robinson
Professor Emeritus
Civil Engineering Department,
The University of Akron
, Akron, OH 44325-3905e-mail: drobins7@tampabay.rr.com
W. K. Binienda
Professor
Civil Engineering Department,
The University of Akron
, Akron, OH 44325-3905e-mail: wbinienda@uakron.edu
J. Appl. Mech. Jul 2005, 72(4): 484-492 (9 pages)
Published Online: October 28, 2004
Article history
Received:
February 9, 2004
Revised:
October 28, 2004
Citation
Robinson, D. N., and Binienda, W. K. (October 28, 2004). "A Representation of Anisotropic Creep Damage in Fiber Reinforced Composites." ASME. J. Appl. Mech. July 2005; 72(4): 484–492. https://doi.org/10.1115/1.1875512
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