Biszczanik Aleksandra, Wałęsa Krzysztof, Kukla Mateusz, Górecki Jan
Faculty of Mechanical Engineering, Institute of Machine Design, Poznan University of Technology, 60-965 Poznań, Poland.
Materials (Basel). 2021 Dec 15;14(24):7763. doi: 10.3390/ma14247763.
The efficiency of material consumption is an important consideration for production processes; this is particularly true for processes that use waste materials. Dry ice extrusion serves as a good example. An examination of the literature on this subject leads to an observation that the commercially available machines for dry ice compression are characterized by a high value of working force. Consequently, the effectiveness of the source consumption, electric energy and carbon dioxide, is very low. The subject of the experimental research presented in the article is the influence of the density of dry ice on the value of Young's modulus. The first part of the article presents the test methodology and the special test stand that was developed to accommodate the unique characteristics of solid-state carbon dioxide. The test results present the characteristics of compaction and relaxation used as the basis for determining the value of Young's modulus. Based on the test results obtained for various material density values, the characteristics of Young's modulus are developed and graphed as a function of the density. The presented results are important for furthering the research on the development of extrusion and compaction processes; for example, using the Drucker-Prager/Cap model for the purpose of optimizing the geometrical characteristics of the work assembly components.
材料消耗效率是生产过程中的一个重要考量因素；对于使用废料的过程而言尤其如此。干冰挤压就是一个很好的例子。对关于该主题的文献进行研究后可以观察到，市售的干冰压缩机器具有很高的工作力值。因此，源消耗（电能和二氧化碳）的效率非常低。本文所呈现的实验研究主题是干冰密度对杨氏模量值的影响。文章的第一部分介绍了测试方法以及为适应固态二氧化碳的独特特性而开发的特殊测试台。测试结果呈现了用作确定杨氏模量值基础的压实和松弛特性。基于针对各种材料密度值获得的测试结果，得出杨氏模量的特性并将其绘制成密度的函数。所呈现的结果对于推进挤压和压实工艺开发的研究很重要；例如，为优化工作组件部件的几何特性而使用德鲁克 - 普拉格/帽盖模型。
