DISCUSSION ON DYNAMIC MECHANICAL BEHAVIORS OF CEMENT MORTAR UNDER QUASI-ONE AND ONE DIMENSIONAL STRAIN STATES
水泥砂浆石在一维与准一维应变状态下动态力学响应的比较和讨论

The dynamic mechanical behaviors of cement mortar under quasi one and one dimensional strain states are studied by using an improved passive confining SHPB method and one stage gas gun respectively. The friction corrected dynamic elastic constants and the yield strength are calculated. And the shock adiabatics at intense dynamic loading by taking into account the internal damage is obtained. Furthermore the stress strain curves of cement mortar under three different stress states and the initial behavior of hydrodynamic curve are compared and analyzed. It is shown that the results obtained from the tests with confined pressure are quite different from the results obtained from the gas gun tests, so that a quasi one dimensional strain test with confined pressure should not be approximately dealt with as an one dimensional strain test.