基于力热耦合材料模型的Steven试验数值模拟方法

楼建锋; 张延耿; 周婷婷; 洪滔

doi:10.11883/1001-1455(2017)05-0807-06

基于力热耦合材料模型的Steven试验数值模拟方法

doi: 10.11883/1001-1455(2017)05-0807-06

北京应用物理与计算数学研究所，北京 100094

基金项目:

国家自然科学基金项目 11302031

国家自然科学基金项目 11402031

中国工程物理研究院科学技术发展基金项目 2014B0101014

中国工程物理研究院安全弹药研发中心开放基金项目 RMC2014B02

详细信息

作者简介:
楼建锋(1980—)，男，博士，副研究员

通讯作者:
张延耿，zhang_yangeng@iapcm.ac.cn

中图分类号: O381
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- 文章访问数: 4597
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- PDF下载量: 243
- 被引次数: 17
出版历程
- 收稿日期: 2016-01-29
- 修回日期: 2016-06-12
- 刊出日期: 2017-09-25

Numerical method for simulating Steven test basedon thermo-mechanical coupled material model

Institute of Applied Physics and Computational Mathematics, Beijing 100094, China

摘要

摘要: 在力热耦合材料模型中，增加炸药自热放能模型，建立了Steven试验的力-热-化耦合的数值模拟方法。数值计算模型中，应力应变关系采用双线性硬化弹塑性模型，炸药受力后的热作用采用各向同性热材料模型，炸药的化学反应采用Arrhenius反应率函数，同时还考虑了升温和熔化对材料力学、热学性能的影响。针对标准Steven试验，通过数值分析得到了靶板的变形情况和炸药点火的速度阈值，将计算结果与实验数据进行了比较，两者符合较好。表明该方法可以较好地模拟Steven试验，而且与以往的分析模型和方法相比，本文的方法不需要增加经验性的点火准则和判据，具有更广泛的适用性，可以为研究低速撞击条件下炸药的力热响应和局域化点火问题提供参考。
- Steven试验 /
- 力热耦合 /
- 低速撞击 /
- 非冲击点火
Abstract: In this paper, we figured out a numerical simulation method involving the mechanical, thermal and chemical properties of the Steven test based on the thermo-mechanical coupled material model to simulate the Steven test of the plastic bonded explosive 9501. In this model, the stress-strain relationship is described by the dynamic plasticity model, the impact-induced thermal effect depicted by the isotropic thermal material model, the chemical reaction is described by the Arrhenius reaction rate law, with the effects of heating and melting on mechanical properties and thermal properties of materials also taken into account. Specific to the standard Steven test, the numerical model was validated by comparing the obtained deformation of the target and the ignition threshold of the PBX 9501 with the experimental data in the references. The calculated results are in good agreement with the experimental data, suggesting that this method is capable of simulating the Steven test. Compared to the previous models, this model does not need to incorporate experiential ignition criterion and therefore can be used more widely in the study of thermo-mechanical responses and local ignition of explosives subjected to low velocity impact.
- Steven test /
- thermo-mechanical coupled model /
- impact /
- non-shock initiation

HTML全文

图 1 Steven试验装置结构示意图

Figure 1. Configuration for Steven test

下载: 全尺寸图片幻灯片

图 2 计算模型的初始图像

Figure 2. Initial configuration of simulation model

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图 3 被弹丸撞击后靶板的计算图像

Figure 3. Deformed state of target impacted by projectile

下载: 全尺寸图片幻灯片

图 4 样品盒背板中心应变的对比

Figure 4. Comparison of strain at center of holder's back plate

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图 5 典型时刻温度云图对比

Figure 5. Comparison of temperature profile at typical time

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图 6 典型时刻压力云图对比

Figure 6. Comparison of pressure profile at typical time

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图 7 不同撞击速度下点火位置的温升

Figure 7. Temperature variation of ignition point at different impact velocities

下载: 全尺寸图片幻灯片

表 1 炸药点火反应的速度阈值与实验数据比较

Table 1. Predicted threshold of impact velosity inducing explosive ignisioncompared experimental data

文献	v/(m·s^-1)
文献	实验^[4]	计算^[4]	本文计算
[3]	54~56	44~45	45~48
[2]	43~53	45~50	45~49

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参考文献(19)

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