Are the cohesive zone models necessary for delamination analysis
作者： Zifeng Yuan , Jacob Fish
DOI: 10.1016/J.CMA.2016.06.023
关键词:
摘要: Abstract We develop a dual-purpose damage model (DPDM) that can simultaneously intralayer (ply failure) and interlayer (delamination) as an alternative to conventional practices models ply failure by continuum mechanics (CDM) delamination cohesive elements. From purely computational point of view, if successful, the proposed approach will significantly reduce cost eliminating need for having double nodes at interfaces. At core, DPDM is based on regularized with vectorial representation ellipsoidal surface. Shear correction factors are introduced match mixed mode fracture toughness analytical zone model. A predictor–corrector local–nonlocal regularization scheme, which treats portion nonlocal local, developed verified. Two variants studied: single- two-scale DPDM. For DPDM, reduced-order-homogenization (ROH) framework employed matrix phase modeled DPDP while inclusion CDM. The verified several multi-layer laminates various orientations including double-cantilever beam (DCB), end-notch-flexure (ENF), mixed-mode-bending (MMB), three-point-bending (TPB).
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