A fully nonlinear finite element analysis for prediction of localization∕delocalization and compression fracture of moderately thick imperfect transversely isotropic rings, under applied hydrostatic pressure, is presented. The combined effects of modal imperfections, transverse shear∕normal deformation, geometric nonlinearity, and bilinear elastic (a special case of hypoelastic) material property on the emergence of interlaminar shear crippling type instability modes are investigated in detail. An analogy to a soliton (slightly disturbed integrable Hamiltonian system) helps understanding the localization (onset of deformation softening) and delocalization (onset of deformation hardening) phenomena leading to the compression damage∕fracture at the propagation pressure. The primary accomplishment is the (hitherto unavailable) computation of the mode II fracture toughness (stress intensity factor∕energy release rate) and shear damage∕crack bandwidth, under compression, from a nonlinear finite element analysis, using Maxwell’s construction and Griffith’s energy balance approach. Additionally, the shear crippling angle is determined using an analysis, pertaining to the elastic plane strain inextensional deformation of the compressed ring. Finally, the present investigation bridges a gap of three or more orders of magnitude between the macro-mechanics (in the scale of mms and up) and micro-mechanics (in the scale of microns) by taking into account the effects of material and geometric nonlinearities and combining them with the concepts of phase transition via Maxwell construction and Griffith-Irwin fracture mechanics.
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October 2006
Research Papers
Localization, Delocalization, and Compression Fracture in Moderately Thick Transversely Isotropic Bilinear Rings Under External Pressure
Reaz A. Chaudhuri
Reaz A. Chaudhuri
Member ASME
Department of Materials Science & Engineering,
e-mail: r.chaudhuri@m.cc.utah.edu
University of Utah
, Salt Lake City, UT 84112-0560
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Reaz A. Chaudhuri
Member ASME
Department of Materials Science & Engineering,
University of Utah
, Salt Lake City, UT 84112-0560e-mail: r.chaudhuri@m.cc.utah.edu
J. Eng. Mater. Technol. Oct 2006, 128(4): 603-610 (8 pages)
Published Online: July 11, 2006
Article history
Received:
August 10, 2005
Revised:
July 11, 2006
Citation
Chaudhuri, R. A. (July 11, 2006). "Localization, Delocalization, and Compression Fracture in Moderately Thick Transversely Isotropic Bilinear Rings Under External Pressure." ASME. J. Eng. Mater. Technol. October 2006; 128(4): 603–610. https://doi.org/10.1115/1.2345453
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