PSI - Issue 19

Yuya Tanaka et al. / Procedia Structural Integrity 19 (2019) 320–327 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

323

4

Fig. 2. Configuration of specimens and an alignment fixture.

Fig. 3. Shape of a jig with a target of laser light.

Fig. 4. Configuration of specimens and measurement jigs.

3. Results and discussion

3.1. Coefficient of kinetic friction

Figure 5 (a) shows the time variations of F and S , which were measured under p = 10 MPa, f = 1Hz and S a ≈ 100 μm . These data were measured at N ≈ 1000 cycles from the beginning of the test. Figure 5 (b) shows the relationship between F and S at N = 1000 cycles, which is characterized by a squared-shaped hysteresis loop. The region where