scholarly journals Dynamic Yield Strength and Spall Strength of Alumina Short Fiber Reinforced ZL109 Cast Aluminium Alloy

1997 ◽  
Vol 07 (C3) ◽  
pp. C3-1063-C3-1066
Author(s):  
R. Q. Zhang ◽  
C. H. Wang ◽  
G. M. Zhao ◽  
X. W. Zeng
Keyword(s):  
Yield Strength ◽  
Aluminium Alloy ◽  
Spall Strength ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Cast Aluminium ◽  
Dynamic Yield Strength ◽  
Dynamic Yield

scholarly journals Temperature dependence of dynamic yield strength and spall strength for LY12 aluminum alloy under shock loading

2006 ◽  
Vol 55 (8) ◽  
pp. 4202
Author(s):  
Wang Yong-Gang ◽  
Chen Deng-Ping ◽  
He Hong-Liang ◽  
Wang Li-Li ◽  
Jing Fu-Qian
Keyword(s):  
Aluminum Alloy ◽  
Yield Strength ◽  
Temperature Dependence ◽  
Shock Loading ◽  
Spall Strength ◽  
Dynamic Yield Strength ◽  
Dynamic Yield

Measurement of Dynamic Stress and Strain in Tensile Test Specimens

1944 ◽  
Vol 11 (2) ◽  
pp. A65-A71
Author(s):  
R. O. Fehr ◽  
E. R. Parker ◽  
D. J. DeMicheal
Keyword(s):  
Tensile Strength ◽  
Yield Strength ◽  
Testing Machine ◽  
Impact Testing ◽  
High Rate ◽  
Stress And Strain ◽  
Dynamic Tensile Strength ◽  
Dynamic Yield Strength ◽  
Dynamic Yield ◽  
Cold Rolled

Abstract In the investigation detailed in this paper, the tensile strength, the yield strength, and the breakage energy of test specimens (cold-rolled steel and dural) were measured while the specimens were being broken by a force applied at a high rate of speed in a commercial high-velocity impact-testing machine. The dynamic tensile strength, the dynamic yield strength and the dynamic breakage energy were found to be higher than the static values up to the maximum impact velocities of these tests (100 fps). The paper contains: (1) A presentation of some results of these tests. (2) A description of the technique used. (3) A description of the analysis used.

scholarly journals Calibration of Discrete-Element-Method Parameters for Cohesive Materials Using Dynamic-Yield-Strength and Shear-Cell Experiments

Processes ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 278 ◽  
Author(s):  
Subhodh Karkala ◽  
Nathan Davis ◽  
Carl Wassgren ◽  
Yanxiang Shi ◽  
Xue Liu ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Surface Energy ◽  
Yield Strength ◽  
Discrete Element Method ◽  
Critical State ◽  
Discrete Element ◽  
Shear Cell ◽  
Dynamic Yield Strength ◽  
Dynamic Yield ◽  
Friction Parameters

This study tested the effectiveness of using dynamic yield strength (DYS) and shear-cell experiments to calibrate the following discrete-element-method (DEM) parameters: surface energy, and the coefficients of sliding and rolling friction. These experiments were carried out on cohesive granules, and DEM models were developed for these experiment setups using the JKR cohesion contact model. Parameter-sensitivity analysis on the DYS model showed that the DYS results in the simulations were highly sensitive to surface energy and were also impacted by the values of the two friction coefficients. These results indicated that the DYS model could be used to calibrate the surface energy parameter once the friction coefficients were fixed. Shear-cell sensitivity analysis study found that the influence of surface energy on the critical-state shear value cannot be neglected. It was inferred that the shear-cell model has to be used together with the DYS model to identify the right set of friction parameters. Next, surface energy was calibrated using DYS simulations for a chosen set of friction parameters. Calibrations were successfully conducted for simulations involving experimentally sized particles, scaled-up particles, a different shear modulus, and a different set of friction parameters. In all these cases, the simulation DYS results were found to be linearly correlated with surface energy and were within 5% of the experimental DYS result. Shear-cell simulations were then used to compare calibrated surface-energy values for the scaled-up particles with the experimentally sized particles. Both the simulations resulted in similar critical-state shear values. Finally, it was demonstrated that a combination of DYS and shear-cell simulations could be used to compare two sets of friction parameters and their corresponding calibrated surface energy values to identify the set of parameters that better represent the flow behavior demonstrated by the experimental system.

The Dynamic Yield Strength of Steel at an Intermediate Rate of Loading

1948 ◽  
Vol 159 (1) ◽  
pp. 11-23 ◽  
Author(s):  
A. F. C. Brown ◽  
R. Edmonds
Keyword(s):  
Yield Strength ◽  
Alloy Steel ◽  
Underwater Explosion ◽  
Low Alloy Steel ◽  
Heat Treated ◽  
Static Tensile ◽  
Static Yield ◽  
Dynamic Yield Strength ◽  
Dynamic Yield ◽  
Rate Of Loading

A comparison has been made between the dynamic and static tensile yield strengths of eight steels varying from mild steel to a heat-treated low-alloy steel, the rate of loading in the dynamic tests being such as would occur in a ship under the action of an underwater explosion. The dynamic yield strength of the steels with low static strength was 20–30 per cent greater than their static yield strength but, for the stronger steels, the increase was less, being negligible in the case of the heat-treated low-alloy steel. This result conforms with the findings of other investigators, and shows that any increase in strength under the dynamic loading considered is too small to be of importance in design.

Use of Strain Energy Density W and Qo as Quality Indices for Rating the Quality of Cast Aluminium Alloy354 as a Function of Processing Parameters

2013 ◽  
Vol 704 ◽  
pp. 189-194 ◽  
Author(s):  
Prateek Sibal ◽  
G. Dinesh Babu ◽  
M. Nageswara Rao
Keyword(s):  
Energy Density ◽  
Yield Strength ◽  
Aluminium Alloy ◽  
Aging Temperature ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Artificial Aging ◽  
Heat Treatments ◽  
Cast Aluminium

Cast aluminium alloy 354 has found widespread application in the automotive industry for its excellent mechanical properties and good castability. The stringent emission norms and demands for improved fuel economy have pushed automobile technology to new frontiers. This has led to efforts to reduce weight while maintaining higher vehicle performance. Cast aluminium alloy 354 is a material that performs with reasonable effectiveness in the high stress automobile environment. The present study looks at the use of strain energy density W and the quality index Qo to determine the effect of process parameters like aging temperature and modification on the quality of the alloy 354 and also to monitor the effect of interrupted heat treatments T6I4 and T6I6 on the quality of the material. The strain energy density W calculated for the interrupted heat treatments on alloy 354 show a broad inverse relation with yield strength Rp. An improvement in the yield strength and the strain energy density of the alloy is observed when the alloy is subjected to modification. At artificial aging temperatures lower than the artificial aging temperature adopted in standard aging treatment an improvement in the Qo and W quality of the alloy 354 have been observed.

Sign in / Sign up

Export Citation Format

Share Document