scholarly journals Assessment of crack-related problems in layered ceramics using the finite fracture mechanics and coupled stress-energy criterion

2016 ◽  
Vol 2 ◽  
pp. 2014-2021 ◽  
Author(s):  
Oldřich Ševeček ◽  
Michal Kotoul ◽  
Dominique Leguillon ◽  
Eric Martin ◽  
Raul Bermejo
Keyword(s):  
Fracture Mechanics ◽  
Energy Criterion ◽  
Stress Energy ◽  
Finite Fracture Mechanics ◽  
Layered Ceramics ◽  
Coupled Stress

scholarly journals Mode I fatigue limit of notched structures: A deeper insight into Finite Fracture Mechanics

2020 ◽  
Vol 227 (1) ◽  
pp. 1-13
Author(s):  
Alberto Sapora ◽  
Pietro Cornetti ◽  
Alberto Campagnolo ◽  
Giovanni Meneghetti
Keyword(s):  
Fracture Mechanics ◽  
Fatigue Limit ◽  
Energy Criterion ◽  
Threshold Value ◽  
Critical Distance ◽  
Structural Parameter ◽  
Mode I ◽  
Present Contribution ◽  
Stress Energy ◽  
Finite Fracture Mechanics

AbstractIn the present contribution, the coupled stress-energy criterion of Finite Fracture Mechanics (FFM) is applied to assess the fatigue limit of structures weakened by sharp V- and U-notches and subjected to mode I loading conditions. The FFM is a critical-distance-based approach whose implementation requires the knowledge of two material properties, namely the plain material fatigue limit and the threshold value of the stress intensity factor (SIF) range for the fatigue crack growth of long cracks. However, the FFM critical distance is a structural parameter, being a function not only of the material but also of the geometry of the notched component. Experimental notch fatigue results taken from the literature and referred to a variety of materials and geometrical configurations are compared with FFM theoretical estimations, obtained through simple semi-analytical relationships. The case of semi-circular edge notches is also dealt with.

Finite fracture mechanics: A coupled stress and energy failure criterion

2006 ◽  
Vol 73 (14) ◽  
pp. 2021-2033 ◽  
Author(s):  
Pietro Cornetti ◽  
Nicola Pugno ◽  
Alberto Carpinteri ◽  
David Taylor
Keyword(s):  
Fracture Mechanics ◽  
Failure Criterion ◽  
Finite Fracture Mechanics ◽  
Coupled Stress ◽  
Energy Failure

scholarly journals Non-local criteria for the borehole problem: Gradient Elasticity versus Finite Fracture Mechanics

Meccanica ◽  
2021 ◽  
Author(s):  
A. Sapora ◽  
G. Efremidis ◽  
P. Cornetti
Keyword(s):  
Stress Concentration ◽  
Fracture Mechanics ◽  
Elastic Material ◽  
Fracture Criterion ◽  
Biaxial Loading ◽  
Gradient Elasticity ◽  
Energy Conditions ◽  
Material Behaviour ◽  
Finite Fracture Mechanics ◽  
Non Local

AbstractTwo nonlocal approaches are applied to the borehole geometry, herein simply modelled as a circular hole in an infinite elastic medium, subjected to remote biaxial loading and/or internal pressure. The former approach lies within the framework of Gradient Elasticity (GE). Its characteristic is nonlocal in the elastic material behaviour and local in the failure criterion, hence simply related to the stress concentration factor. The latter approach is the Finite Fracture Mechanics (FFM), a well-consolidated model within the framework of brittle fracture. Its characteristic is local in the elastic material behaviour and non-local in the fracture criterion, since crack onset occurs when two (stress and energy) conditions in front of the stress concentration point are simultaneously met. Although the two approaches have a completely different origin, they present some similarities, both involving a characteristic length. Notably, they lead to almost identical critical load predictions as far as the two internal lengths are properly related. A comparison with experimental data available in the literature is also provided.

Sign in / Sign up

Export Citation Format

Share Document