Results 261 to 270 of about 537,633 (307)

Deformation induced anisotropy and memorized back stress in constitutive model

International Journal of Plasticity, 1998
Abstract Plastic-deformation induced anisotropy and memorization of back stress due to pre-loading affect the current loading. These phenomena are examined with tension and/or torsion tests, using SUS 304. Considering both anisotropy, and movement and memorization of back stress, equi-plastic surfaces are predicted.
Ishikawa, H., Sasaki, K.
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The back stress in high temperature deformation

Acta Metallurgica, 1969
Abstract The applicability of the following strain rate equation to high temperature deformation is examined. e=|gf s exp ( −ΔH 0 KT ) exp ( vτ − τB] KT ) Here e is the tensile or compressive strain rate; φs is a structure factor; ΔH0 is the activation enthalpy in the absence of effective stress; v is the activation ...
openaire   +1 more source

Static Lower Back Stress Analysis in Citrus Harvesting

Transactions of the ASAE, 1995
The dramatic increase in worker injuries and Workers’ Compensation insurance costs have created a need to reduce worker mechanical stress in harvesting citrus. This analysis implemented occupational biomechanics to evaluate lower back stress in the current citrus harvesting operation.
null T. M. Conlan, null J. A. Miles, null W. E. Steinke   +2 more
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Back stress and Jaumann rates in finite plasticity

International Journal of Plasticity, 1990
Abstract It has been shown that the indiscriminate use of the Jaumann rate in constitutive equations for plastic materials gives rise to an oscillatory stress response in the presence of monotonically i increasing strain. In this paper we discuss the use of the Jaumann rate in constitutive models with a back stress.
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Back-stresses, image stresses, and work-hardening

Acta Metallurgica, 1973
Abstract A comparison is made between recently published theories on the plastic behaviour of dispersion-hardened alloys in which no plastic relaxation occurs. It is shown that Tanaka and Mori's(1) calculation is a rigorous lower bound for the hardening to be expected. Some new derivations are given for the mean strains in matrix and inclusions.
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Strain partitioning and back-stress evaluation in harmonic-structure materials

Materials Letters, 2020
Abstract Heterogenous bimodal harmonic-structure (HS) materials are interesting because of excellent structural efficiency. In this work, we present a simple yet powerful analytical model allowing to evaluate strain partitioning between coarse- and ultrafine- grain (CG and UFG, respectively) structure components in HS materials and to estimate the ...
Dmytro Orlov, Roman Kulagin, Yan Beygelzimer   +2 more
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Back stress solutions.

The American journal of nursing, 1993
P. P., Mary Lawler Lewis
  +5 more sources

Reducing back stress to nursing personnel: an ergonomic intervention in a nursing home

Ergonomics, 1992
A prospective epidemiologic study was conducted in two units (140 beds and 57 nursing assistants) of a nursing home to demonstrate the efficacy of an ergonomic intervention strategy to reduce back stress to nursing personnel. The total programme involved the following: determining patient handling tasks perceived to be most stressful by the nursing ...
A, Garg, B, Owen
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Equivalence of Back Stress during Plastic and Creep Deformation

2001
Back stresses caused by both cyclic and creep deformations are discussed in this paper. The equivalence of the back stress due to cyclic and creep deformation are shown by a series of experiments. Different creep curves due to cycle number in preloading are simulated by a constitutive model based on dislocation density (Estrin et al. 1996), considering
H. Ishikawa, K. Sasaki, T. Mayama
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Low-back stresses when learning to use a materials handling device

Ergonomics, 1999
This study examines the potential effect of short-term practice on low-back stresses during manual lifting and lowering of a 15 kg load, and while using two different types of materials handling devices (MHDs) to lift and lower a 40 kg load. The two MHDs used were an articulated balance arm and a pneumatic hoist.
D B, Chaffin, B S, Stump, M A, Nussbaum, G, Baker   +3 more
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