Results 311 to 320 of about 3,042,639 (351)

Stress-Level-Dependent Stress Ratio Effect on Fatigue Crack Growth

1999
Fractographic measurements of fatigue crack growth rate for small cracks reveal stress-ratio effects even when fatigue crack closure is absent. These effects are restricted to low fatigue crack growth rates and become significant with increase in net stress levels.
R Sunder, WJ Porter, NE Ashbaugh
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Reproducibility of pressure transmission ratios in stress incontinent women

Neurourology and Urodynamics, 1993
AbstractPressure transmission ratios (PTR) are obtained during cough pressure profiles (Δ urethral pressure/Δ bladder pressure × 100) and have been extensively used in pre and post operative evaluation of patients with stress urinary incontinence. Sixteen patients with genuine stress were studied to assess the magnitude of PTR variance in incontinent ...
D A, Richardson, A, Ramahi
openaire   +2 more sources

Stress ratio contributes to fatigue crack growth in dentin

Journal of Biomedical Materials Research Part A, 2005
AbstractAn experimental study of fatigue crack growth in dentin was conducted, and the influence of stress ratio (R) on the crack growth rate and mechanisms of cyclic extension were examined. Double Cantilever Beam (DCB) fatigue specimens were sectioned from bovine molars and then subjected to high cycle fatigue loading (105 < N < 106) under ...
D, Arola, W, Zheng, N, Sundaram, J A, Rouland   +3 more
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Stress Ratio Effects on Collapse of Compacted Clayey Sand

Journal of Geotechnical Engineering, 1991
A“double‐triaxial” test procedure similar to the double‐oedometer test was developed to determine the wetting‐induced collapse potential of soils subjected to anisotropic stress states. Based on a series of double‐triaxial tests performed on a slightly expansive clayey sand, it was established that the magnitude of volumetric strain resulting from a ...
E.C. Lawton, R.J. Fragaszy, J.H. Hardcastle   +2 more
openaire   +1 more source

Effect of Stress on International Normalized Ratio During Warfarin Therapy

The Annals of Pharmacotherapy, 2002
OBJECTIVE: To discuss the effect of stress on the international normalized ratio (INR) when patients are taking warfarin. CASE SUMMARY: Two patients at a pharmacist-managed anticoagulation clinic who were stable with anticoagulation developed elevated INR values after a stressful event occurred. All other factors known to elevate the INR were unchanged;
Toni L, Hawk, Dawn E, Havrda
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STRESS‐RATIO EFFECT OF FATIGUE CRACK PROPAGATION IN A BIAXIAL STRESS FIELD

Fatigue & Fracture of Engineering Materials & Structures, 1981
AbstractFatigue crack propagation tests were conducted under conditions of equibiaxial, uniaxial and shear loading by using a cruciform specimen in a servo hydraulic testing machine. The effect of non‐singular stress cycling on the fatigue crack propagation rate was examined based on the observation of crack opening behavior. The crack propagation rate
T. HOSHIDE, K. TANAK.A, A. YAMADA
openaire   +1 more source

Income, stress, and sex ratios over 1895-2010

Biodemography and Social Biology
The medical literature has shown that populations under high stress have a lower sex ratio at birth (i.e. number of males for every 100 females). In this paper, I examine the relationship between income, as a source of economic stress, and the sex ratio at a subnational level for the 1895-2010 period.
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Crack closure inadequacy at negative stress ratios

International Journal of Fatigue, 2004
Abstract This paper reports an experimental study related to the influence of different maximum load, P max , levels on crack closure, and on fatigue crack growth, at a negative stress ratio, R =−1. It focuses on crack tip plasticity effects and on roughness effects on crack closure.
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The Hypoplastic Model Expressed by Mean Stress and Deviatoric Stress Ratio

2018
Over the past several decades, hypoplasticity has been shwon to be a powerful tool to predict the non-linear behaviour of soils. Early hypoplastic models were developed from trial-and-error procedures and these models are usually expressed in a unique tensorial equation regarding the stress tensor. However, most models for fluid-like soil are expressed
Xuzhen He, Wei Wu, Dichuan Zhang, Jong Kim   +3 more
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Determination of Theoretical Plastic Stress-Strain Relations for Variable Combined Stress Ratios

Journal of Applied Mechanics, 1952
Abstract To distinguish between the various theories of plastic flow defining plastic stress-strain relations under combined stresses, it is necessary to conduct combined stress tests in which the ratio of the stress components does not remain constant during the test.
L. W. Hu, Joseph Marin
openaire   +1 more source