Failure prediction for cross-rolled beryllium sheet material

Article Abstract:

A model for estimating the failure of cross-rolled beryllium SR-200 sheets for material loaded in a complex state of stress uses the Tsai-Wu failure criterion. The brittle failure of anisotropic materials is due to complex states of stress. The plotting of failure surfaces, in standard Cartesian coordinates, form ellipses. Nodal points in the finite element model for exceeding failure criterion are checked by numerical simulation. Simulation also increases the load until the stress at any point in the material is more than the failure criterion.

Analysis, Metal fracture, Beryllium

---

Verification of a cohesive zone model for ductile fracture

Article Abstract:

A cohesive zone model (CZM) under plane stress and plane strain conditions is used for numerically simulating ductile crack growth in an aluminium alloy. Numerical simulation involves the use of a finite element method and experimental data as control curves to verify the assumed cohesive law. The separation traction and energy of the material are assumed to be constant during ductile fracture. CZM is found to be independent of stable crack extension.

Aluminum alloys

---

Coalescence-controlled anisotropic ductile fracture

Article Abstract:

Research was conducted to examine the different micromechanical models for coalescence. The ability of the models to integrate void shape and spacing was also investigated. A comparison of two types of coalescence models, namely, a localization-based model and plastic limit-load models, was performed. Findings indicate a good agreement between experimental and predicted results but the approach exhibited numerous limitations.

Plasticity, Anisotropy, Metals (Materials), Ductility, Anisotropy (Physics)

Similar abstracts:

• Abstracts: Fatigue-life prediction methodology using a crack-closure model. High temperature fracture toughness in silicon nitride and sialon
• Abstracts: Polarized life: astronomers probe Orion to answer one of life's mysteries. Good news for the greenhouse
• Abstracts: 1996 IndyCar preview. Silicon under the fingernails
• Abstracts: Influence of harbor contamination on the level and composition of polychlorinated biphenyls in produce in greater New Bedford, Massachusetts
• Abstracts: Did Neandertals lose an evolutionary 'arms' race? Calibrating the mitochondrial clock. The peopling of the Americas

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.