PSI - Issue 13

Zhengkun Liu et al. / Procedia Structural Integrity 13 (2018) 781–786 Z. Liu et al. / Structural Integrity Procedia 00 (2018) 000–000

5

785

300

Gc=2 Gc=20 Gc=50 Gc=100

250

200

150

load F [N]

100

50

0

0

5

10

15

20

displacement u [mm]

Fig. 4. Displacement-force curves with varying the fracture toughness G c .

Firstly, the influence of the loading speed v on the response of the viscoelastic materials is investigated. To this aim, four di ff erent values for loading speed v are in use. This coincides with a decrease in maximal deflection. The obtained force displacement responses are depicted in Fig. 3. It is obvious that the level of the maximal peak force become greater by increasing the loading speed v . On the other hand, it can be observed that the load bearing capacity can be improved by the decreasing the loading speed v .

200

M=10 M=100 M=1000 M=2000 M=5000

150

100

load F [N]

50

0

0

5

10

15

20

displacement u [mm]

Fig. 5. Displacement-force curves with varying the mobility factor M.