In order to study how the tensile strength of sandstone influenced by loading rate

a series of splitting tests are carried out with five loading rates. Based on the comprehensive analysis of the splitting tensile strength

destructive features

the change rule and correlation between microstructure of the splitting surface and energy parameters

the results show that: (1) The split tensile strength of sandstone gradually decrease as loading rate increase

and generally go slow after the first steep upward trend. When loading rate is between 0.01 kN/s to 0.10 kN/s

the tensile strength grew significantly and then tended to slow down at 0.1 kN/s to 1.00 kN/s. (2) Total energy the sample absorbed increase as loading rate increase

and the ratio of elastic strain energy to total energy increases while dissipated energy go down

the time when the crack propagation formed into splitting surface is an order of magnitude less

which indicates the sudden destruction of rock sample enhanced resulted by release of elastic strain energy when peak stress reached

which result in tensile strength enhanced and increasingly complicated micro morphology characteristics. (3) During the rock splitting test

loading rate

energy parameter

features of splitting surface and tensile strength are closely related; first of all

the loading rate affects the total amount and distribution of energy

and the changes in energy parameters affects its destruction process and features of splitting surface; finally

the difference in tensile strength shows. The related analysis methods and ideas references can provide a better reference for similar tests.