Crack Paths 2012

Table 3. Test conditions of specimens

Specimen

Test conditions

W-1.0 Basic constant amplitude test (see Fig. 11(a))

W-2.0 Load level is twice as high as W-1.0 (see Fig. 11(a))

WH-1.0 Basic constant amplitude +high frequency constant amplitude with the

same magnitude (see Fig. 11(a))

WS-1.0 Basic constant amplitude +slam-induced dynamic stress of the same

amplitude (see Fig. 11(b))

Lowfrequency stress with the same maximumand minimumstresses as

M-1.0

those ofWS-1.0 (see Fig. 11(b))

WS-0.5 Basic constant amplitude +slam-induced dynamic stress of the half

amplitude

Lowfrequency stress with the same maximumand minimumstresses as

M-0.5

those of WS-0.5

WS-1.5 Basic constant amplitude +slam-induced dynamic stress of the 150%

amplitude

Lowfrequency stress with the same maximumand minimumstresses as

M-1.5

those of WS-1.5

Figure 11. Comparisons of crack propagation lives for slam-induced stresses

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