On the calculation of tensile stress relaxation modulus for varying stress and strainon the calculation of tensile stress relaxation modulus for varying stress and straindoi:10.1002/app.1970.070141217D.Div.MachinDiv.C.Div.E.Div.RogersDiv.John Wiley & Sons, Ltd.Journal of Applied Polymer Science...
Calculated true stress–strain values are entered in the table above. As a sample calculation we consider the load = 6200 lb, elongation = 0.4 in. data point, for which e = Δl/l0 = 0.4/2 = 0.2 in./in. or 0.2 m/m. As ε = ln(1 + e), ε = ln(1 + 0.2) = 0.182. To...
After calculation, it can be concluded that the pressure P and the voltage are directly proportional to each other, which is also supported by the simulation results in Fig. 2a. The above considerations are ideal states based on a number of assumptions of the calculation. The actual experimental...
The ultimate tensile strength (UTS) can be calculated by finding the maximum stress in a stress–strain curve, which occurs in the plastic regime. Identifying this point on the stress–strain curve also requires the calculation of the plastic portion of the stress–strain curve. View article Jou...
As shown in Table 3, two off-axis curves of a composite are used for reverse calculation of interphase properties. Other off-axial curves are used as validation. Figures 6–8 illustrate the comparison between theoretical and experimental stress-strain curves. Tables 5–7 are strength prediction ...
An InstronÒ 2663-821 advanced video extensome- ter (AVE) was used to determine the instant strain at every moment, allowing for the plotting of the entire stress–strain curve and the automatic calculation of the modulus and the % elongation to break. The distance between the marks of ...
1.2 Stress–Strain Relations Examples of room temperature tensile behavior for a number of polymers are illustrated in Fig. 1, as plots of true tensile stress,σ, versus local logarithmic strain, ε (G’Sell et al. 1992). Amorphous PVC, PC and semicrystalline nylon 66, and PEEK have glass...
Table 1 gives examples of how different materials may be ranked based on force per cross sectional area (stress) or based on properties per width and mass (index). If materials are ranked based on stress, steel and glass are much stiffer and stronger in the plane of the sheet material tha...
aThese values do not include the calculation of average and standard deviation. The trends in P cr and P u were evaluated with changes in the fiber volume fraction and tensile wire for the NiTiNb and NiTi SMA fibers, as presented in Figure 5. The mean value of P cr ranged from 3.85 to...
830MECHANICAL TESTING/NUMERICAL SIMULATION58 (2016) 10ture values [20, 21] for the same martensiticsteel 17-4PH (1.4548) after hardening at900°F (i.e., state H900) are given. Further-more, for all three sources, the equations ofa linear regression calculation for areshown as these are ...