Abstract

The process of concrete under symmetric impact was experimentally investigated in the case of primary gas gun and was analyzed with Lagrange method. The value-time relations of u, v, e on every lagrange position are gained. The relationship of strain-stress is also obtained. The whole process is numerical simulated by LSDYNA970. It indicate that the damage effect of concrete under impact loading can be described by the function with plasticity strain at constant volume, equivalence plasticity strain and pressure. The manganin pressure gauge is used to measure the pressure-time curves of the samples. The parameters of high-pressure equation are obtained by the numerical simulation. Numerical simulation is a necessary complement to the test. The spall phenomenon is observed by the numerical simulation.

Keywords:

Concrete, lagrangian analysis, state equation, shock wave,

References

Competing interests

The authors have no competing interests.

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The authors have no competing interests.