نتایج جستجو برای: redundant shearing strain

تعداد نتایج: 247671  

In any metal forming process, both the strain rate and deformation rate depend on the die profile. The die profile also, is responsible for the non-uniformity of the deformation along the cross-section. These affect the quality and mechanical properties of the product. Therefore, if a die is designed, in which the affecting variables can be controlled spontaneously it is hoped to obtain a produ...

2016
E. Gustafsson

Background: There is a shortage of experimentally determined strains during sheet metal shearing. These kinds of data are a requisite to validate shearing models and to simulate the shearing process. Methods: In this work, strain fields were continuously measured during shearing of a medium and a high strength steel sheet, using digital image correlation. Preliminary studies based on finite ele...

2016
E. Gustafsson L. Karlsson M. Oldenburg

Background: Shearing is a fast and inexpensive method to cut sheet metal that has been used since the beginning of the industrialism. Consequently, published experimental studies of shearing can be found from over a century back in time. Recent studies, however, are due to the availability of low-cost digital computation power, mostly based on finite element simulations that guarantees quick re...

2016
A. E. TZAVARAS

We consider the adiabatic shearing of an incompressible non-Newtonian liquid with temperature dependent viscosity, subjected to steady shearing of the boundary. Identical equations govern the plastic shearing of a solid exhibiting thermal softening and strain rate sensitivity with constitutive relation obeying a certain power law. We establish that every classical solution approaches a uniform ...

In this paper, a displacement-based, variationally consistent, two variable refined theory for shear deformable beams is presented. The beam is assumed to be of linearly elastic, homogeneous, isotropic material and has a uniform rectangular cross-section. In this theory, the beam axial displacement and beam transverse displacement consist of bending components and shearing components. The assum...

Journal: :Journal of Geotechnical and Geoenvironmental Engineering 2021

Unsaturated soils in engineered geostructures like embankments or retaining walls may experience seismic compression during earthquakes due to particle rearrangement associated with large-strain cyclic shearing. Although previous studies have investigated volume changes drained shearing of unsaturated soils, undrained presents a more complex situation. During shearing, total volume, matric suct...

Journal: :international journal of civil engineering 0
m. karimpour fard university of guilan, rasht, iran postal code: 1841 tel/fax: +98 131 3232806 n. shariatmadari iran university of science and technology narmak, teharn, iran postal code: 16846_13114 tel: +98 21 77451500-9 m. keramati iran university of science and technology narmak, teharn, iran postal code: 16846_13114 tel: +98 21 77451500-9 h. jafari kalarijani iran university of science and technology narmak, teharn, iran postal code: 16846_13114 tel: +98 21 77451500-9

due to the existence of fibrous materials such as plastic fragments, the strength anisotropy of municipal solid waste (msw) materials is the main source of differences between their mechanical response in direct shear and triaxial apparatus. as an extension of earlier research on the mechanical behavior of msw using a large traixail apparatus, results presented in shariatmadari et al. [1] and k...

H Tavakoli-Anbaran M Shariati, R Rezaei

Besides experimental methods, numerical simulations bring benefits and great opportunities to characterize and predict mechanical behaviors of materials especially at nanoscale. In this study, a nano-single crystal aluminum (Al) as a typical face centered cubic (FCC) metal was modeled based on molecular dynamics (MD) method and by applying tensile and compressive strain loadings its mechanical ...

Journal: :Journal of The Royal Society Interface 2016

2004
L. X. Yang

Digital shearograohy has demonstrated great potential in revealing defects in objects especially in detecting delaminations in composite materials. It is gaining more and more acceptance by automotive and aerospace industries in the field of nondestructive testing (NDT) of composite materials. A key optical component used in shearography is a shearing device in which the shearing amount, sheari...

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