A probabilistic micromechanics model for damaged composites

Article Abstract:

The generalized technique of cells, an interfacial constitutive model and a probabilistic model are combined to produce a method for modeling the stress-strain response of fibrous composites with fiber/matrix interfacial damage. The method overcomes the limitations of a single repeating cell in modeling the response of a composite with debonding interfaces through the application of a probabilistic modeling procedure based upon an effective interfacial strength. This technique is employed to recover the transverse tensile and shear response of unidirectional silicon-carbide/titanium as measured in the laboratory.

Methods, Stress analysis (Engineering), Micromechanics, Micromechanics (Engineering)

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Nonlinear elastic behavior of unidirectional composites with fiber waviness under compressive loading

Article Abstract:

The nonlinear elastic response of unidirectional composites with fiber waviness under compressive loading was studied theoretically and experimentally. Unidirectional carbon/epoxy composites with uniform, graded and localized fiber waviness were analyzed. Complementary strain energy was employed to determine the material nonlinear stress-strain relations. Experimental findings were in good agreement with calculations based on the constitutive model.

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Pressure sensitive nonassociative plasticity model for DRA composite

Article Abstract:

A pressure sensitive nonassociative continuum plasticity model with kinematic hardening is proposed to predict the plastic response of Discontinuously reinforced aluminum (DRA) subjected to multiaxial stress states. The yield function depends on hydrostatic pressure in agreement with experimental findings.

Analysis, Hydrostatic pressure, Continuum mechanics

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