scholarly journals Finite Fracture Mechanics at elastic interfaces

2012 ◽  
Vol 49 (7-8) ◽  
pp. 1022-1032 ◽  
Author(s):  
P. Cornetti ◽  
V. Mantič ◽  
A. Carpinteri
Keyword(s):  
Fracture Mechanics ◽  
Finite Fracture Mechanics ◽  
Elastic Interfaces

Symmetrical or Non-Symmetrical Debonds at Fiber–Matrix Interfaces: A Study by BEM and Finite Fracture Mechanics on Elastic Interfaces

2017 ◽  
Vol 08 (03n04) ◽  
pp. 1740008 ◽  
Author(s):  
Mar Muñoz-Reja ◽  
Luis Távara ◽  
Vladislav Mantič
Keyword(s):  
Fracture Mechanics ◽  
Material System ◽  
Interface Failure ◽  
Linear Elastic ◽  
Transverse Tension ◽  
Crack Configuration ◽  
Finite Fracture Mechanics ◽  
Elastic Interfaces ◽  
Symmetrical Solution ◽  
Fiber Matrix

A recently proposed criterion is used to study the behavior of debonds produced at a fiber–matrix interface. The criterion is based on the Linear Elastic–(Perfectly) Brittle Interface Model (LEBIM) combined with a Finite Fracture Mechanics (FFM) approach, where the stress and energy criteria are suitably coupled. Special attention is given to the discussion about the symmetry of the debond onset and growth in an isolated single fiber specimen under uniaxial transverse tension. A common composite material system, glass fiber–epoxy matrix, is considered. The present methodology uses a two-dimensional (2D) Boundary Element Method (BEM) code to carry out the analysis of interface failure. The present results show that a non-symmetrical interface crack configuration (debonds at one side only) is produced by a lower critical remote load than the symmetrical case (debonds at both sides). Thus, the non-symmetrical solution is the preferred one, which agrees with the experimental evidences found in the literature.

scholarly journals Crack Onset and Propagation in Composite Materials Using Finite Fracture Mechanics on Elastic Interfaces

2014 ◽  
Vol 3 ◽  
pp. 1365-1370 ◽  
Author(s):  
Mar Muñoz-Reja ◽  
Luis Távara ◽  
Vladislav Mantič ◽  
Pietro Cornetti
Keyword(s):  
Composite Materials ◽  
Fracture Mechanics ◽  
Finite Fracture Mechanics ◽  
Elastic Interfaces

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.

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