Cohesive modeling of delamination in Z-pin reinforced composite laminates
Source abstract
Abstract
Abstract The mode I interlaminar fracture in Z -pin reinforced composite laminates is modeled using a cohesive volumetric finite element (CVFE) scheme. The test configuration used in this study is a Z -pin reinforced double cantilever beam specimen. A bilinear rate-independent but damage-dependent cohesive traction–separation law is adopted to model the fracture of the unreinforced composite and discrete nonlinear spring elements to represent the effect of the Z -pins. The delamination toughness and failure strength of the Z -pin reinforced composites are determined by a detailed comparison study of the numerical modeling results with experimental data. To further reduce the computational effort, we introduce an equivalent distributed cohesive model as a substitute for the discrete nonlinear spring representation of the Z -pins. The cohesive model is implemented on various test problems with varying failure parameters and for varying spatial Z -pin reinforcement configurations showing good agreement with the experimental results.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mechanical Behavior of Composites · Composite Structure Analysis and Optimization · Optical measurement and interference techniques
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References (21)
Show source-provided references
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