Strain Energy Density as Failure Criterion for Quasi-Static Uni-axial Tensile Loading

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 cha...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Andrea Kusch, Simone Salamina, Daniele Crivelli, Filippo Berto
Formato: article
Lenguaje:EN
Publicado: Gruppo Italiano Frattura 2021
Materias:
Acceso en línea:https://doaj.org/article/955b0dafe620498092eb9191c9e8e3e4
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
Descripción
Sumario: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 <15%) with experimental data.