Ultimate strength,

Both % El and % RA are frequendy used as a measure of workabifity. Workabifity information also is obtained from parameters such as strain hardening, yield strength, ultimate tensile strength, area under the stress—strain diagram, and strain-rate sensitivity. 

Temper Yield strength Ultimate tensUe Elongation % in RockweU Electrical... 

Material Tensile modulus, GPa Tensile strength, yield, MPa Tensile strength, ultimate, MPa Elongation, % Poisson s ratio Fracture toughness, MPaVm... 

Surface roughness to process risk FMEA Severity Rating, strength Ultimate tensile strength Uniaxial yield strength Bilateral tolerance Unilateral tolerance Tolerance to process risk Variance Class width... 

Some of the important inelastic properties of a material undergoing plastic deformation are yield strength, ultimate tensile strength, ductility and toughness. 

For materials not subject to high temperatures the design stress is based on the yield stress (or proof stress), or the tensile strength (ultimate tensile stress) of the material at the design temperature. 

The following polymer characteristics were obtained on the variously irradiated test specimens melt index (ASTM 1238-62T), Vicat softening temperature (modified ASTM 1525-58T) heat distortion (ASTM D 1220-63T) physical strength yield strength ultimate tensile strength percent elongation at break (ASTM D 412-64T) chemical resistance to boiling toluene. 

Temper Heat treatment,3 Yield strength Ultimate tensile Elongation, % in Rockwell Electrical... 

Evaluation. Ultimate tensile strength, ultimate elongation, and 100% modulus were determined by using 0.075-inch samples in an Instron operating at a rate of 20 inches/minute (ASTM D-638-61T). 

It is now well established that TCP acts as an antiplasticizer of PVC at low concentrations and as a plasticizer at high concentrations. The observed variations in tensile modulus, tensile strength, impact strength, ultimate elongation, and thermal expansion coefficient of PVC with additive concentration have been attributed to the antiplasticization-plasticization phenomenon (T7, 18, 19). Antiplasticization of PVC also results in a decrease in gas permeability, and plasticization in an increase in gas permeability (17). 

Criteria of extrudability, mouldability, spinnability and stretchability as used in practice are described (melt index, spiral length, mouldability index, melt strength, ultimate thread length, etc.). These criteria are based on the dimensionless parameters (numerics) of the processes. 

Table 9 shows yield strength, ultimate elongation and modulus for twelve different plastics materials before treatment in supercritical carbon dioxide. Yield strength can be noted to vary in a broad range from 10.7 MPa for LDPE to 73.8 MPa for polyoxymethylene (POM). 

Table 10 shows yield strength, ultimate elongation and modulus for eleven materials after treatment in supercritical carbon dioxide at two conditions along with the data obtained for the control samples. The effects of supercritical carbon dioxide on the mechanical properties of materials in Table 10 are discussed for each material individually. 

Supercritical or high pressure carbon dioxide can induce polymer crystallization and plasticize polymers. The systematic study on the interaction of carbon dioxide with twenty different crystalline and amorphous polymers has been performed and various influencing parameters have been determined. Through the examination, analysis and comparison of the yield strength, ultimate elongation and modulus both before and after treatments in supercritical carbon dioxide at 3000 psi and 70°C, it was found that two main factors, i.e., degree of crystallinity and the presence of a polar side chain group, e g., ester. 

Table 2. Yield strength, ultimate tensile strengths, and elongation of several commercial aluminum alloys at room and cryogenic temperatures [7,81 ...

Flexural Strength (ultimate load, 14-in. span, center-point load)... 

Sample TMPTA Tensile strength Ultimate Tension Set... 

Despite many studies of the effects of photooxidation on mechanical properties (such as Young s modulus, tensile strength, ultimate elongation, etc.. ..), there is very little information about these effects on fatigue life. For that reason, we studied the fatigue life of LDPE films as a function of UV exposure. The results are shown in Fig. 2 where logNp (Np being the number of cycles sustained before failure) is plotted vs. time of UV exposure. In this case the strain amplitude is 8% and the frequency (oj) is 10 cycles/mln. 

The major properties obtained from the engineering stress-engineering strain tensile curve are modulus of elasticity, yield strength, ultimate tensile strength and amount of elongation at fracture. 

The values obtained for proportional limit, 0.2 % offset yield strength, ultimate strength, and percent reduction in area for wires at the test temperatures of 300°, 77.3° and 4.2°K are presented in Figs. 5, 6, 7, and 8. 

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