客观描述高应变率作用下的约束混凝土的力学行为需要考虑加载历史。
To objectively describe the behavior of confined concrete under high strain rates the loading history has to be taken into account.
在SHPB实验中，通过采用整形器技术，实现实验过程中的应力平衡和常应变率加载。
A pulse shaping technique has been used in split Hopkinson bar (SHPB) experiment, for ensuring the specimen in dynamic stress equilibrium and loaded under constant strain rate during the test.
本文重点针对传统的SHPB实验技术试样中早期应力不平衡和实验中难以达到常应变率加载这两大问题，建立了入射波整形技术。
Because it is hard to obtain dynamic stress equilibrium and constant strain rate in soft materials specimen during the conventional SHPB experiments, a pulse shaping technique is developed.
给出了测试脆性材料时实现恒应变率加载的加载条件。
For brittle material testing, the governing equation of input waveform for attaining constant strain-rate loading is given.
利用分数阶微积分理论提出等应变率加载情况下的软土应力—应变关系。关系式显示应力—应变之间呈乘幂函数关系。
On the basis of the fractional calculus operator theory, the stress-strain relation of soft soil under the condition of loading with constant strain rate is proposed.
金属材料发生塑性变形的阻力通常与加载的应变率有关。
The deformation resistance of most of the metallic materials is influenced by the strain rate.
根据试验结果拟合了TNT材料随着加载速率和环境温度变化的本构关系，分析表明该本构关系可以很好地描述材料的应变率、温度效应。
Analysis of the results indicates that by the constitutive equation the strain rate de-pendence and thermo-softening effect of TNT are described.
试验不仅实现了应变率逐步变化加载过程，同时也实现了蠕变加载和应力松弛过程。
The strain rate was changed stepwise several times; and stress relaxation tests and a set of creep tests were performed during otherwise monotonous loading at a constant strain rate.
试验不仅实现了应变率逐步变化加载过程，同时也实现了蠕变加载和应力松弛过程。
The strain rate was changed stepwise several times; and stress relaxation tests and a set of creep tests were performed during otherwise monotonous loading at a constant strain rate.
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