| 周国才,胡时胜*,付峥.用于测量材料高温动态力学性能的SHPB技术[J].实验力学,2010,25(1):9~15 |
| 用于测量材料高温动态力学性能的SHPB技术 |
| SHPB Technique Used for Measuring Dynamic Properties of Material in High Temperature |
| 投稿时间：2009-03-02 修订日期：2009-09-02 |
| DOI： |
| 中文关键词: SHPB 高温 应力波 |
| 英文关键词:SHPB high temperature stress waves |
| 基金项目: |
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| 中文摘要: |
| 讨论了高温下分离式Hopkinson压杆（SHPB）实验的两种方案：单独加热试样并快速对杆与同时加热试样和杆再修正温度梯度的影响。前者避免了杆被加热但是操作复杂，后者简单稳定。为了分析后者温度梯度的影响设计了一个简化模型，采用数值计算进行修正，提出了精度适当的假设，并且进行了实验验证。测量了试件和杆一起加热时杆上的温度分布，证实计算采用的温度分布是合理的。据此得到的专用于材料高温动态力学性能测试的SHPB数据处理公式简单实用，便于推广使用。 |
| 英文摘要: |
| Two schemes for high temperature SHPB experiment are discussed in this paper: "heating only the specimen then quick targeting bars" and "heating both specimen and bars then eliminating the effects of temperature gradient in data-processing". The former avoids the heating of rods but the operation is complicated, the latter is simple and steady. For analyzing temperature gradient in latter scheme, a simplified model was designed and modified by numerical calculation, based on the precision appropriate assumption, which were verified by experiments. The temperature distribution in both heated specimen and bars was measured. Results confirm the temperature distribution obtained from numerical calculation is reasonable. Such a method provides a simple and practical data-processing formula for measuring dynamic properties of materials in high temperature on SHPB equipment. |
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