Strain Energy Density as Failure Criterion for Quasi-Static Uni-axial Tensile Loading
| Autor: | Simone Salamina, Filippo Berto, Andrea Kusch, Daniele Crivelli |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Strain energy density Structural engineering (General) Mechanical Engineering Linear elasticity Stress–strain curve TA630-695 Strain energy density function Critical value Quasi-brittle material PMMA Brittleness Mechanics of Materials Ultimate tensile strength Failure assessment TJ1-1570 Mechanical engineering and machinery Composite material Quasistatic process |
| Zdroj: | Frattura ed Integrità Strutturale, Vol 15, Iss 57 (2021) Frattura ed Integrità Strutturale; Vol. 15 No. 57 (2021): July 2021; 331-349 Frattura ed Integrità Strutturale; V. 15 N. 57 (2021): July 2021; 331-349 |
| ISSN: | 1971-8993 |
| Popis: | Strain energy density is successfully used as criterion for failure assessment of brittle and quasi-brittle material behavior. This work investigates the possibility to use this method to predict the strength of V-notched specimens made of PMMA under static uniaxial tensile load. Samples are characterized by a variability of notch root radii and notch opening angles. Notched specimens fail with a quasi-brittle behavior, albeit PMMA has a nonlinear stress strain curve at room temperature. The notch root radius has most influence on the strength of the specimen, whereas the angle is less relevant. The value of the strain energy density is computed by means of finite element analysis, the material is considered as linear elastic. Failure prediction, based on the critical value of the strain energy density in a well-defined volume surrounding the notch tip, show very good agreement (error |
| Databáze: | OpenAIRE |
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