Dynamic Direct Shear Test (1st Report)

In this paper, we described the dynamic direct shear test of soil which was carried out recently in our laboratory, by means of acting cyclic shear stress. Dry TOYOURA sand and UBE alluvial clay were used in this test. The alluvial clay was preconsolidated by the special apparatus shown in Fig. 3. Fig. 5 and Fig. 6 are the relationships between sharing strength and number of pulse that required the shearing failure. We can compare dynamic shearing strength of soil with static one in Fig. 8.

New Resonant DC Link

Zero Voltage Soft Switching

Digital Control New Voltage Vector Pulse Pattern

Voltage-fed Three-Phase Inverter