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Related to Proportional limit: rupture strength, modulus of resilience, ultimate stress
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It was experimentally determined that cyclic proportional limit [[bar.
2) and (3) and further in the text, strains and stresses are normalized to the proportional limit strain and the stress of materials, i.
To analyze the lateral displacement at the proportional limit, the angle [[beta].
If the plastic limit of the joint is investigated, the embedment strength estimated at the proportional limit is a pertinent strength value.
Since two stress-strain relations were measured from one test specimen, two Young's moduli, two proportional limit stresses, and one compressive strength were obtained.
Table 2 shows the averaged Young's modulus E, averaged proportional limit stress Y, and compressive strength F.
The shear modulus, shear stress at the proportional limit, and shear strength were determined by a similar procedure to that in the +45[degrees]/-45[degrees] off-axis tension test.
The shear modulus, shear stress at the proportional limit, and shear strength were determined by a similar procedure to that used for the +45[degrees]/-45[degrees] and 450 off-axis tension test.
As shown in Figure 1, three- and four-point bending tests were conducted by varying the span lengths, and the Young's moduli, proportional limit stresses, and bending strengths corresponding to the span/depth ratios were obtained.
The proportional limit was determined as the load at which the curve deviates from the initial linear portion.
Decreases in peak voltage of approximately 40 to 80 percent and decreases in RMS voltage of approximately 40 to 70 percent indicate the presence of incipient decay and correspond with a 15 to 20 percent decrease in elastic modulus and a 10 to 15 percent decrease in compression perpendicular-to-the-grain stress at the proportional limit.
The suggested introduction of proportional limits on cancels also met with criticism.

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