nom] are nominal stress
and strain, respectively; [[sigma].
The macroscopic view confirms low nominal stress
under reversed bending as primary source of failure and not due to rotating-bending fatigue (mostly occurs) as crack initiated at only one point on surface A.
Results of fatigue tests were evaluated statistically to calculate the slope of the S-N curves k, scatter with Ts and the nominal stress
amplitude after 5*[10.
Figure 5(a) to Figure 5(c) display the nominal stress
versus nominal strain curves of separators along different orientations at 0.
The idea is to pre-compress an elastomeric sample and insert it into an oven, then monitor the decay in its reaction to compression with time and temperature; nominal stress
is calculated by dividing the recorded reaction by the nominal cross-section of test washer or button.
Based on the principle of equivalent stress, Lemaitre and Chaboche proposed damaged material constitutive equation, the nominal stress
tensor and effective stress tensor [sigma].
displacement curve acquired, the nominal stress
0] = s, s is the initial nominal stress
(initial load of one LI), [[?
nom] is the nominal stress
calculated by equation [[sigma].
A theoretical, or geometrical, stress concentration factor Kt or Kts is used to relate the actual maximum stress at the discontinuity to the nominal stress
The regression equations of S-N curves (applied nominal stress
Global features such as nominal stress
, excess compliance, and fastener load are connected with local conditions that affect fatigue and fretting, including contact pressures, interface slips, residual stresses, and the intensity and location of the stress concentrations.