On the correctness of the energy criterion in fracture mechanics

1995 ◽  
Vol 31 (10) ◽  
pp. 799-805 ◽  
Author(s):  
L. P. Khoroshun
Keyword(s):  
Fracture Mechanics ◽  
Energy Criterion

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.

Size Effect on Strength of Bi-Material Joints of Steel With Fiber-Polymer Composite

2008 ◽  
Author(s):  
Zdeneˇk P. Bazˇant ◽  
Jia-Liang Le ◽  
Ferhun C. Caner ◽  
Qiang Yu
Keyword(s):  
Fracture Mechanics ◽  
Size Effect ◽  
Experimental Studies ◽  
Strength Criterion ◽  
Energy Criterion ◽  
Composite Joints ◽  
Metal Composite ◽  
Singular Stress ◽  
Hybrid Joint ◽  
Large Size

Metal-composite joints between steel ribs and advanced fiber-polymer composites are an effective structural system for hybrid ship hulls. Similar joints are of interest for fuel-efficient aircraft. The current designs of such joints are generally based on the strength criterion, which ignores fracture mechanics. Aimed at an efficient and reliable design, this study investigates the size effect on the strength of these joints theoretically, numerically and experimentally. The analytical formulation of the size effect is asymptotically anchored at the large-size limit in linear elastic fracture mechanics (LEFM). The bi-material corner of the joint is shown to have a singular stress field with complex singularity. The strength of the joint is determined by the energy criterion for the macrocrack initiation at the corner, from which the large-size asymptote of the size effect law has been derived. A general approximate size effect law, spanning all sizes and various joint angles, is further derived via asymptotic matching. Numerical analysis with cohesive fracture model is used to design the experiments. Experimental studies involve the testing of geometrically similar hybrid joint specimens with the size ratio of 1 : 4 : 12. The analytical, numerical and experimental studies all indicate that the strength of bimaterial metal-composite joints is subjected to a strong size effect.

Application of the energy criterion for blade processing

2012 ◽  
Vol 6 (2(8)) ◽  
pp. 11-12
Author(s):  
Наталія Сергіївна Преріс
Keyword(s):  
Energy Criterion
Sign in / Sign up

Export Citation Format

Share Document