Distribution Analysis of Local Ice Pressures in the Indentation Test at Various Velocities

When sea ice acts on vertical structures, there are much higher pressures in localized areas known as high-pressure zones (HPZs) than other areas. The damage failure mode of varies with the velocity and affects distribution HPZs. In this study, an indentation test that drives sheet interaction a rigid plate (indentor) was designed, pressure sensor (consisting 32 × small units 100 mm2) installed indentor face to measure local (LIP) at various velocities. LIPs along thickness, probability relationship LIPS space time were obtained from measurement. results show mainly distributed middle ice, which is consistent full-scale observations previous research. Ductile larger LIP area brittle same threshold kt (kt = σL/σcr). decreases exponentially increasing follows lognormal distribution. maximum appears peak moment global force when ductile failure. However, may not occur and, instead can appear any history curve. HPZ (which 7/8 times LIP) less 2% nominal contact influence spatial temporal analyzed, provide reference for designing structures strength regions.