Biszczanik Aleksandra, Górecki Jan, Kukla Mateusz, Wałęsa Krzysztof, Wojtkowiak Dominik
Institute of Machine Design, Poznan University of Technology, Piotrowo 3, 61-138 Poznań, Poland.
Materials (Basel). 2022 Feb 18;15(4):1555. doi: 10.3390/ma15041555.
In the processing of waste materials, attention must be given to the efficient use of energy. The pelletization of dry ice is a good example of such processes. A literature review shows that in the pelletizers available on the market, the force applied in the process is excessive. As a result, the efficiency of the utilization of inputs, including electricity and carbon dioxide, is at a very low level. This article presents the results of experimental research on the effect of the degree of dry ice compression on the value of the Poisson ratio. The first part of this article presents the research methodology and a description of the test stand, developed specifically for this research, bearing in mind the unique properties of carbon dioxide in the solid state. The results presented show the behavior of dry ice during compression in a rectangular chamber for different final densities of the finished product. As a result, it is possible to determine the values of the Poisson ratio as a function of density, using for this purpose four mathematical models. The findings of this research may be useful for research work focused on the further development of this process, such as by using the Drucker-Prager/Cap numerical model to optimize the geometric parameters of the parts and components of the main unit of the machine used in the extrusion process of dry ice.
在废料处理过程中，必须关注能源的高效利用。干冰造粒就是此类过程的一个很好的例子。文献综述表明，在市场上现有的造粒机中，该过程中施加的力过大。因此，包括电力和二氧化碳在内的投入物的利用效率处于非常低的水平。本文介绍了关于干冰压缩程度对泊松比数值影响的实验研究结果。本文的第一部分介绍了研究方法以及专门为此研究开发的试验台的描述，同时考虑到固态二氧化碳的独特性质。给出的结果展示了在矩形腔室中压缩干冰时，成品不同最终密度下干冰的行为。因此，为此可以使用四个数学模型来确定泊松比随密度变化的值。这项研究的结果可能有助于专注于该过程进一步发展的研究工作，例如通过使用Drucker-Prager/Cap数值模型来优化干冰挤压过程中所用机器主机部件的几何参数。
