混凝土材料动态力学性能实验与数值模拟研究

张柱; 赵慧; 于晖

doi:10.11858/gywlxb.2011.06.009

混凝土材料动态力学性能实验与数值模拟研究

doi: 10.11858/gywlxb.2011.06.009

张柱^1,2, ,,
赵慧¹,
于晖¹

1.
北京理工大学爆炸科学与技术国家重点实验室，北京 100081；
2.
太原科技大学应用科学学院，山西太原 030024

详细信息

通讯作者:
张柱 E-mail:zhangzhu030168@163.com

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出版历程
- 收稿日期: 2010-08-10
- 修回日期: 2010-11-23
- 发布日期: 2011-12-15

Experiments and Numerical Simulations of Concrete Dynamic Mechanical Properties

ZHANG Zhu^{1,2
, ,},
ZHAO Hui¹,
YU Hui¹

1.
State Key laboratory of Explosion Science and Technology, Beijing Institutive of Technology, Beijing 100081, China;
2.
School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China

摘要

摘要: 利用轻气炮对素混凝土材料进行了3种不同冲击速度下的动态力学性能实验，得到了时间-应力曲线，随后利用软件进行数值模拟，将模拟结果与实验结果进行比较，解释了飞片和靶板破坏过程中波的传播过程。通过分析发现：混凝土材料表现出明显的率相关性、滞后效应和应力波的衰减特征，这些与材料内部损伤的演化密切相关；混凝土材料在压缩波、边侧稀疏效应和左、右自由表面反射拉伸波的共同作用下，最终形成宏观破碎；实验中靶板尺寸设计合理，有效避免了边侧稀疏效应对锰铜压阻计测试信号的影响。
- 轻气炮 /
- 素混凝土 /
- 实验 /
- 数值模拟
Abstract: A light gas gun was used to conduct the dynamic mechanical properties experiments of plain concrete material under three different impact velocities, getting the time-stress curves. Then, numerical calculations were used to simulate concrete's light gas gun experiments, comparing the simulation results with experimental results. In this paper the propagation of wave in flyer and target was formulated. Further analysis shows that concrete material has obvious rate-related properties, lag effect and stress wave's attenuation features, and all of this is closely related to the evolution of internal damage in material. Concrete material finally forms macro fracture under the interaction of compression wave, side release effect and reflected tensile wave of left and right free surface. The size of target in the experiment is reasonable, avoiding the effect of side releasing on the test signals of manganin piezoresistive transducer.
- light gas gun /
- plain concrete /
- experiment /
- numerical simulation

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参考文献(22)

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