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Retracted: Fracture investigation of U‐notch made of tungsten–copper functionally graded materials by means of strain energy density
Author(s) -
Mohammadi H.,
Salavati H.,
Alizadeh Y.,
Abdullah A.,
Berto F.
Publication year - 2017
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12616
Subject(s) - materials science , strain energy density function , composite material , fracture toughness , stress intensity factor , strain energy , modulus , ultimate tensile strength , tungsten , young's modulus , fracture (geology) , fracture mechanics , structural engineering , finite element method , metallurgy , engineering
The averaged strain energy density over a well‐defined control volume was employed to assess the fracture of U‐notched specimens made of tungsten–copper functionally graded materials under prevalent mode II loading. The boundary of control volume was evaluated by using a numerical method. Power law function was employed to describe the mechanical properties (elasticity modulus, Poisson's ratio, fracture toughness and ultimate tensile stress) through the specimen width. The effect of notch tip radius and notch depth on notch stress intensity factors and mode mixity parameter χ were assessed. In addition, a comparison based on fracture load between functionally graded and homogeneous W–Cu was made. Furthermore, in this research, it was shown that the mean value of the strain energy density over the control volume can be accurately determined using coarse meshes for functionally graded materials.