Results 211 to 220 of about 1,118,595 (265)

Strain-rate sensitivity and effects of strain rate in sheet forming

Metals Technology, 1980
AbstractThe strain-rate dependencies of flow strength and strain-hardening behaviour are particularly important in sheet-forming operations because they influence strain distribution and necking resistance. Measurements made in uniaxial and biaxial tensile tests on low-carbon steels have shown that strain-rate sensitivity is a function of both strain ...
openaire   +1 more source

Effects of strain rate on the behavior of elastomeric impression

The Journal of Prosthetic Dentistry, 1991
The effects of strain rate on the ultimate tensile strength, ultimate elongation at fracture, and elastic recovery of five commonly used elastomeric dental impression materials were studied. Each specimen was prepared by standard mixing techniques, placed for setting in a standard ASTM mold, removed, trimmed, and mounted in an Instron testing unit ...
J, Klooster, G I, Logan, A H, Tjan
openaire   +2 more sources

The effect of strain rate on a premixed laminar flame

Combustion and Flame, 1986
The structure of a strained premixed laminar flame is examined. The flame is formed in the vicinity of a stagnation point established by the counterflow of fresh mixture and hot combustion products. This ideal configuration analyzed by Libby and Williams [18] with activation energy asymptotics is here examined numerically.
Darabiha, N., Candel, S. M., Marble, F. E.   +2 more
openaire   +2 more sources

Strain Rate and Strain Rate History Effects in Two Mild Steels.

1979
Abstract : Results are presented of a series of experiments performed with two steels to investigate the dependence of flow stress on strain rate and its history. For this purpose quasi-static, dynamic and incremental strain rate tests were conducted on SAE 1020 hot-rolled steel and SAE 1018 cold-rolled steel at room temperature. It is shown that while
J. Duffy, R. H. Hawley, M. L. Wilson
openaire   +1 more source

Strain rate effect on the failure properties of tendons

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 2004
The purpose of this study is to evaluate the effect of strain rate on the failure properties of tendons. Seventy-five chicken flexor digitorum profundus (FDP) tendons were tensile tested at 15 strain rates, ranging from 0.05 to 150 per cent/s. Results showed that strain rate had little effect on the shape of the stress-strain curve.
Ng, B.H., Chou, S.M., Lim, B.H., Chong, A.   +3 more
openaire   +2 more sources

Strain Rate Effects in Composites

Applied Mechanics Reviews, 1997
A review of the high strain rate behavior of filamentary composite materials is presented. The experimental techniques used for evaluating the dynamic performance of composites are discussed, as well as results obtained by researchers for various types of filamentary composites. Areas of research needed for expanding the information base for composites
openaire   +1 more source

The effects of strain and strain rate on residual microstructures in copper

Proceedings, annual meeting, Electron Microscopy Society of America, 1986
The strain rate sensitivity of a variety of materials is known to increase rapidly at strain rates exceeding ∼103 sec-1. This transition has most often in the past been attributed to a transition from thermally activated guide to viscous drag control. An important condition for imposition of dislocation drag effects is that the applied stress, σ, must ...
M. F. Stevens, P. S. Follansbee
openaire   +1 more source

Strain Rate Effects in Tungsten

JOM, 1956
The yield strength of annealed tungsten was found to have a strain rate exponent 12 times as great as that of low carbon steel. The effects of temperature and strain rate could be correlated through the Zener-Hollomon parameter with a heat of activation as-sociated with yielding of 32,000 cai per g-atom. This heat of activation is independent of strain
openaire   +1 more source

High strain rate effects on the strain of alloy steels

Journal of Materials Processing Technology, 1999
Abstract The effect of high strain rates in both compression and torsion was studied on several micro-alloyed steels. The high strain rates were obtained using both a torsion and a compression Split Hopkinson Bar, which are capable of producing strain rates in excess of 10 3  s −1 .
M. Nabil Bassim, N. Panic
openaire   +1 more source

Inverse Strain-Rate Effects

Journal of Applied Physics, 1969
Decrease of stress level at a given strain with increase of strain rate is discussed in terms of three theories: the Johnston-Gilman theory of yield and flow, diffusional aging mechanisms, and stress induced structural instability. None of these theories explain inverse rate effects.
openaire   +1 more source