Modelling and optimization of melt cast explosives fabrication process

熔铸炸药制造工艺建模与优化

• 批准号: 470921-2014
• 负责人: Dubois, Charles
• 金额: $ 0.98万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=577602
• 关键词: Modelling; optimization; melt; cast; explosives

Melt-cast explosives charges are used not only in military systems, but also in civilian blasting operations where they act as "booster" to sustain the detonation of gel explosives formulations. These explosives are essentially a dispersion of solid crystals in a fusible matrix such as TNT. As for any explosives devices, the sizes and shapes of the charges are important to their performance. They are prepared by first mixing the solid ingredients in the hot melt explosive and then cast in a mold by gravity. Once filled, the mold is cooled to allow the fusible matrix to set. The rate of cooling process is critical to the quality of the final product. Improper temperature conditions will lead to cracks and trapped void in the part. This project is aimed at modelling the casting and cooling process of generic explosives parts as a means of improving their fabrication. It also has for objectives to facilitate the development of new formulations by studying how variables such as melt rheology and thermal properties affect the casting and cooling process. Therefore, whenever new ingredients will be used, it would be easier to adapt to these changes. The developed models will also be employed to increase safety when new formulations will be mixed for the first times.

熔铸炸药装药不仅用于军事系统，而且也用于民用爆破作业，作为“助推器”维持凝胶炸药配方的爆炸。这些炸药本质上是固体晶体在TNT等可熔基质中的分散体。对于任何爆炸装置，装药的大小和形状对其性能都很重要。它们的制备方法是首先将固体成分混合在热熔炸药中，然后通过重力浇铸在模具中。一旦填充，模具冷却以允许可熔基质凝固。冷却过程的速度对最终产品的质量至关重要。不适当的温度条件将导致部件中出现裂纹和陷陷获空隙。该项目旨在模拟一般爆炸物部件的铸造和冷却过程，以改进其制造。 它还具有通过研究熔体流变学和热性能等变量如何影响铸造和冷却过程来促进新配方开发的目标。因此，每当使用新材料时，更容易适应这些变化。开发的模型也将用于增加新配方首次混合时的安全性。