International Journal of Fracture Mechanics
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Fracture under compression: the direction of initiation
International Journal of Fracture Mechanics - Tập 61 - Trang 267-294 - 1993
The preferential orientation for the initiation of a crack is the one which gives the maximum strain energy reduction for a given crack length. This proposed criterion is a logical extension of the maximum energy release rate criterion. It makes no assumptions on the configuration, the homogeneity, the stress condition on the crack faces, or the material response, consequently it is applicable to ......
Is a crack an effective stress riser for triggering of plasticity?
International Journal of Fracture Mechanics - Tập 139 - Trang 359-367 - 2006
From the stress intensity factors induced by a circular loop attached to a crack front, the resulting image force acting on the dislocation was calculated. The relaxation of the elastic energy stored due to neighbouring surfaces is obtained through integration of the variation of the image force while shifting the loop towards the inside of the material. The amount of relaxation, as numerically de......
Impact testing of laser glazed Charpy samples
International Journal of Fracture Mechanics - Tập 25 - Trang R3-R4 - 1984
Stress Intensity Factors for an Interface Kinked Crack in a Bi-Material Plate Loaded Normal to the Interface
International Journal of Fracture Mechanics - - 2007
Assessment of the delamination hazard of the core face sheet bond in structural sandwich panels
International Journal of Fracture Mechanics - Tập 109 - Trang 413-432 - 2001
Delamination of the adhesive bond between face sheets and cellular core of structural sandwich panels is a major problem in sandwich construction. Due to incompatibilities in the modes of deformation associated with the face sheets and the cellular core, stress concentrations and singularities can occur even in absence of cracks. These stress concentrations are assumed to govern the onset of delam......
On the convergence of 3D free discontinuity models in variational fracture
International Journal of Fracture Mechanics - Tập 166 - Trang 3-11 - 2010
Free discontinuity problems arising in the variational theory for fracture mechanics are considered. A Γ -convergence proof for an r-adaptive 3D finite element discretization is given in the case of a brittle material. The optimal displacement field, crack pattern and mesh geometry are obtained through a variational procedure that encompasses both mechanical and configurational forces. Possible ex......
Measurement of small scale yielding at a crack tip in a brittle polymer by means of shrinkage above the glass transition temperature
International Journal of Fracture Mechanics - Tập 16 - Trang R133-R136 - 1980
A theory of crack initiation and growth in viscoelastic media II. Approximate methods of analysis
International Journal of Fracture Mechanics - Tập 11 - Trang 369-388 - 1975
Starting with equations developed in Part I for the opening mode of displacement, simple, approximate relations are derived for predicting the time of fracture initiation and crack tip velocity in linearly viscoelastic media. First we use the assumption that the second derivative of the logarithm of creep compliance with respect to logarithm of time is small (which is normally valid for viscoelast......
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