Results 261 to 270 of about 3,517,567 (320)

Fracture in strain gradient elasticity

Metals and Materials, 1998
Recent experiments have shown that the microscale material behavior is very different from that of bulk materials, and displays strong size effects when the characteristic length associated with the deformation is on the order of microns. Conventional continuum theories, however, can not predict this size dependence because they do not have an ...
K. C. Hwang, T. F. Cuo, Y. Huang, J. Y. Chen   +3 more
openaire   +1 more source

Hydraulic-Fracture-Width Inversion Using Low-Frequency Distributed-Acoustic-Sensing Strain Data—Part I: Algorithm and Sensitivity Analysis

, 2020
Low-frequency distributed-acoustic-sensing (LF-DAS) data, which can be treated as linear-scaled strain variations, have been used recently to monitor hydraulic-fracturing treatments.
Yongzan Liu, G. Jin, Kan Wu, G. Moridis
semanticscholar   +1 more source

Nonlocal fracture criterion: Finite strains

Doklady Physics, 2002
Theory of multiple overlap of severe strains [1] allows us to analyze crack growth for finite strains of a body made of viscous elastic material on the basis of subsequently merging micropores and secondary cracks with the main crack. To do this, a criterion for the breakage of a wall between the main crack and a secondary crack or a micropore merging ...
V. A. Levin, E. M. Morozov
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Strain-rate dependent fracture initiation

International Journal of Fracture, 1980
The theory of linear elastic dynamic fracture mechanics for Heaviside loading of an isolated crack is employed to formulate the response to constant strain-rate loading of a single crack. Numerical integration of the Heaviside solution is shown to lead to fracture initiation stresses that are dependent upon the imposed strain rate.
M. E. Kipp, D. E. Grady, E. P. Chen
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Plane strain cumulative fracture

International Journal of Fracture, 1982
By analysing appropriate models, the condition for plane strain crack propagation at a constant crack tip stress intensity factor (cumulative fracture) is shown to be dependent on the amount of plastic deformation per crack extension increment, and the yield stress. The results are relevant to the problem of environmentally assisted crack growth.
openaire   +1 more source

Stress/strain variability in fractured media: a fracture geometric study

Geotechnical and Geological Engineering, 2021
The presence of natural fractures in fractured media plays a vital role in the in-situ stress state, which is predominantly influenced by tectonic stresses and local perturbations. Fracture orientation, wellbore stability/orientation, and permeability anisotropy are strongly dependent on local stress variations.
Meysam Khodaei, Ebrahim Biniaz Delijani, Ali Naghi Dehghan, Mastaneh Hajipour, Kasra Karroubi   +4 more
openaire   +1 more source

Sprains, Strains, and Fractures

Journal of Consumer Health on the Internet, 2017
ABSTRACTSprains, strains, and fractures are common in all age groups, but individuals have little or no information about what to expect until it happens to them or someone they know. These injuries can occur in a flash, but the recovery can take days, months, or sometimes even longer.
openaire   +1 more source

Bones of teleost fish demonstrate high fracture strain

Journal of Biomechanics, 2021
The endoskeleton of teleosts (bony fish) includes a vertebral spine with articulating rib bones (RBs) similar to humans and further encompasses mineralized tissues that are not found in mammals, including intermuscular bones (IBs). RBs form through endochondral ossification and protect the inner organs, and IBs form through intramembranous ossification
I.A.K. Fiedler, O. Elmogazy, G. Courtemanche, L. Cardoso, J.P. Berteau   +4 more
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Fracture Patterns and Strain Information in Thoracolumbar Burst Fractures

Advances in Bioengineering, 2000
Abstract A combined loading of axial compression and anterior shear on a spinal motion segment causes the severe form of burst fracture. Thoracolumbar motion segments were instrumented with a strain gage on the middle of the anterior wall and one near the base of the pedicles. Two samples were subjected to high-speed axial compression in
Noshir A. Langrana, Robert D. Harten, David C. Lin, Mitchell F. Reiter, Casey K. Lee   +4 more
openaire   +1 more source

The plane strain fracture of polysulfone

Engineering Fracture Mechanics, 1974
Abstract It is shown using photoelastic techniques that the concepts of fracture mechanics apply to the plain strain fracture of isotropic polysulfone, a ductile glassy polymer. This forms a yielded zone, consisting of crazes, ahead of the crack, that can be described by the Dugdale model.
R.D.R. Gales, N.J. Mills
openaire   +1 more source