Results 261 to 270 of about 580,035 (347)

Variation of strain energy release rate with plate thickness

International Journal of Fracture, 1973
An analytical model of a through-thickness crack in a statically stretched plate is presented in which the crack front stress state is permitted to vary in the direction of the plate thickness. The amplitude or intensity of this stress field can be made nearly constant over a major portion of the interior crack front which is in a state of plane strain.
G. C. Sih, R. J. Hartranft
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Strain-Energy Release Rate Analysis of Plates with Postbuckled Delaminations

Journal of Composite Materials, 1989
Delamination growth due to local buckling of a delamination was studied. Delamination growth was assumed to be related to the total strain-energy release rate, G. In order to calculate the distribution of G along the delamination front, a virtual crack closure technique was developed which is suitable for use with plate analysis.
John D. Whitcomb, K.N. Shivakumar
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Strain energy release rate distributions for double cantilever beam specimens

AIAA Journal, 1991
A 24-ply composite double cantilever-beam specimen under mode I (opening) loading has been analyzed by a 3D FEM code that calculated along a straight delamination starter for several different specimen materials. An isotropic specimen was found to have a strain-energy release rate distribution which varied along its delamination front due to the ...
J. H. Crews, K. N. Shivakumar, I. S. Raju   +2 more
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The Strain Energy Release Rate of Composite Microcracking: A Variational Approach

Journal of Composite Materials, 1989
A variational analysis approach has been used to determine the two- dimensional thermoelastic stress state in cross-ply laminates of type [0 m/90 n] s and [90 m/ 0 n] s. The stress analysis was used to calculate the energy release rate due to formation of a new microcrack. The analysis accurately includes the effect of residual thermal stresses. When
J. Nairn
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Compliance Methods For Bonded Joints: Part II - Investigation Of The Equivalent Crack Methodology To Obtain The Strain Energy Release Rate For Mode I

The journal of adhesion, 2022
The present work investigates the equivalent crack methodology by considering the Double Cantilever Beam (DCB) test to obtain the strain energy release rate of adhesive joints, using different compliance methods rather than the Compliance Based Beam ...
Fernando Madureira, L. D. da Silva, V. Tita   +2 more
semanticscholar   +1 more source

On strain energy release rates for interfacial cracks

KSME Journal, 1993
The bimaterial constant e is necessarily used in the interfacial crack problems. Some authors tried to neglect the effects of the bimaterial constant e. To investigate the effects of the bimaterial constant e, the individual strain energy release rates,G I * andG II
Seong Kyun Cheong, Oh Nam Kwon
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Strain energy release rates for turning cracks

Fibre Science and Technology, 1972
Abstract The ratio of strain energy release rates for propagation of a crack in its own plane and perpendicular to it has an important effect on the direction of propagation. This ratio is a function only of the relative values of the elastic constants of the material, and the mode of stressing of the crack. The ratio is determined by an experimental
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On the Energy Release Rate in Finite–Strain Elasticity

Mechanics of Advanced Materials and Structures, 2008
Griffith's fracture criterion describes in a quasistatic setting whether or not a pre-existing crack in an elastic body is stationary for given external forces. This fracture criterion can be reformulated in terms of the the energy release rate (ERR), which is the derivative of the deformation energy of the body with respect to a virtual crack ...
Dorothee Knees, Alexander Mielke
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Calculating Strain Energy Release Rate in Cracked Orthotropic Beams

Journal of Thermoplastic Composite Materials, 1996
The total strain energy release rate of a homogeneous orthotropic cracked beam-like structure is calculated using Timoshenko's beam theory. The total strain energy release rate is modified by including the energy spent in the deformation of the beam near the crack tip.
R. K. Pandey, C. T. Sun
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Strain energy release rate formulae for 3D finite element

Engineering Fracture Mechanics, 1995
Abstract Three expressions for the strain energy release rate for three-dimensional singular and non-singular finite elements are derived based on Irwin's virtual crack-closure method. The strain energy release rate for the three modes of fracture mechanics can be expressed in terms of the nodal forces ahead of the crack front and the opening ...
G. De Roeck, M.M. Abdel Wahab
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