Results 271 to 280 of about 116,211 (311)
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The strain rate dependency of fracture in polyethylene: Fracture initiation
Journal of Applied Polymer Science, 1989AbstractThe dependency of fracture on the rate of strain of a range of polyethylene samples was measured in three point flexural tests at 23°C. The range of strain rates from 10−1 to 10−7 reciprocal seconds was examined. The J integrals at the initiation of the cracks were determined.
D. B. Barry, O. Delatycki
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Fracture mechanism of amorphous polymers at strain fields
Phys. Chem. Chem. Phys., 2014Owing to the wide application of polymeric materials, understanding the fracture mechanism of amorphous polymers at strain fields is a fundamentally important challenge. In this work, we use molecular dynamics simulations to investigate the uniaxial deformation of amorphous polyethylene and further monitor the polyethylene fracture process induced by ...
Lan, Huang +3 more
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Characterization of compressive fracture strain based on bilinear strain paths
International Journal of PlasticityJeong Whan Yoon, Kwanghyun Yu
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Plane strain cumulative fracture
International Journal of Fracture, 1982By 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.
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A simple assumed-strain quadrilateral shell element for finite strains and fracture
Engineering with Computers, 2014This work recovers an established technique for improving quadrilateral shell element performance in both out-of-plane and in-plane bending cases using a mixed formulation. A four-field variational principle is established and we relate, at the discrete level, the Lagrange multipliers and secondary right Cauchy---Green field with the displacement and ...
Pedro Areias +2 more
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Fracture Patterns and Strain Information in Thoracolumbar Burst Fractures
Advances in Bioengineering, 2000Abstract 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 +4 more
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Fracture strains in sheet metalforming and specific essential work of fracture
Engineering Fracture Mechanics, 1987Abstract It is proposed that a plausible relationship exists between the specific essential work of fracture (R) obtained from testpieces incorporating starter cracks and the work required locally to nucleate a crack in flawless thin sheet metals.
A.G. Atkins, Y.W. Mai
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Strain-rate dependent fracture initiation
International Journal of Fracture, 1980The 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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A microstructural interpretation of the fracture strain and characteristics fracture distance
Scripta Metallurgica, 1984Fracture toughness is a function of both the spacing of the primary inclusions and the extent of growth of the voids nucleated at these inclusions. Only by includng the effect of void growth can the high toughness of the HP 9-4-20 be understood. The HP 9-4-20 and the base + Ni + Si steel have comparable values of X /SUB O/ , but the higher toughness of
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Strain and fracture mechanism of Cu–TiC
Materials Letters, 1999Abstract Strain and fracture mechanisms of Cu–TiC system with 5.3 vol % TiC was studied by an `in situ tensile test in SEM'. It was shown that during tensile strain the first cracks appear in the places with the largest strain after decohesion of larger particles or clusters of small particles from the matrix.
Michal Besterci +4 more
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