Results 271 to 280 of about 3,517,567 (320)

Plane strain fracture in poroelastic media

Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences, 1991
The effect of fully coupled poroelasticity on an impulsively loaded crack in plane strain is investigated. A formally exact solution for a semi-infinite crack in a linear, isotropic, poroelastic medium with a prescribed internal stress is considered; the solution is obtained using Laplace and Fourier transforms in time and space ...
Atkinson, C., Craster, R. V.
openaire   +1 more source

Kink bands promote exceptional fracture resistance in a NbTaTiHf refractory medium-entropy alloy

Science
Single-phase body-centered cubic (bcc) refractory medium- or high-entropy alloys can retain compressive strength at elevated temperatures but suffer from extremely low tensile ductility and fracture toughness.
David H. Cook, Punit Kumar, Madelyn I. Payne, Calvin H. Belcher, P. Borges, Wenqing Wang, Flynn Walsh, Zehao Li, Arun Devaraj, Mingwei Zhang, M. Asta, A. M. Minor, E. Lavernia, D. Apelian, R. Ritchie   +14 more
semanticscholar   +1 more source

Plane strain fracture toughness

1982
The test procedure for plane strain fracture toughness testing is standardized [1, 2] by the American Society for Testing and Materials, ASTM. At first glance, it seems strange that a standard test is necessary. The versatility of the K concept implies that any cracked specimen for which K can be calculated is suitable.
openaire   +1 more source

The strain rate dependency of fracture in polyethylene: Fracture initiation

Journal of Applied Polymer Science, 1989
AbstractThe 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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A Simple Methodology to Determine Fracture Strain of Press-Hardened Steels Under Plane Strain Bending

Metallurgical and Materials Transactions. A, 2021
H. Cai, J. F. Wang, WU D., YI H.L.
semanticscholar   +1 more source

Instability of Plastic Strain and Fracture. Strain Diagram for Inhomogeneous Media

Journal of Applied Mechanics and Technical Physics, 2000
A strain diagram for a locally inhomogeneous medium (a medium with a porous structure or a system with noncut particles) is constructed on the basis of the Cosserat nonlinear pseudocontinuum model. A modified criterion of geometrical softening is considered that makes it possible to establish the dependence of the moment of stability loss on the ...
openaire   +2 more sources

Shading affects fracture force and fracture strain of apple fruit skins

Scientia Horticulturae, 2020
Abstract Simple observation shows that naturally shaded apple fruit are more prone to russeting than sun-exposed fruit. The formation of microcracks in the fruit skin is the first visible sign of russeting. Our objective was to establish the effects of different levels of shading on the mechanical properties of apple (Malus × domestica Borkh.) fruit ...
Bishnu P. Khanal, Sisay Berhanu Mekonnen, Moritz Knoche   +2 more
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Fracture mechanism of amorphous polymers at strain fields

Phys. Chem. Chem. Phys., 2014
Owing 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, Xiaoping, Yang, Xiaolong, Jia, Dapeng, Cao   +3 more
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STRESS AND STRAIN ACTIVATED FRACTURE ELEMENTS2

Journal of Texture Studies, 1983
The characteristics of fracture elements in which the activation criterion is either a critical stress and/or strain are described. Their possible effects on the properties of phenomenological rheological models are demonstrated in the case of simplified models subjected to hypothetical deformation, stress relaxation and creep tests.
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Fracture Initiation in Plane Strain Forging

1985
This paper presents a preliminary investigation of the ability of elastic-plastic finite-element simulations to predict the initiation of ductile fracture in bodies undergoing large plastic deformation.
S. E. Clift, P. Hartley, C. E. N. Sturgess, G. W. Rowe   +3 more
openaire   +1 more source