Experimental Investigation on the Effect of Dry Ice Compression on the Poisson Ratio

Abstract

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.

Influence of Die Land Length on the Maximum Extrusion Force and Dry Ice Pellets Density in Ram Extrusion Process

“…In the literature, t R is described as a product of dynamic viscosity (η and E) [ 29 ]. Considering the variability of the mechanical parameters of dry ice as a function of ρ [ 20 , 30 ], the results are deemed applicable for extrudates whose density does not exceed the extrudate density determined in the experiments (i.e., 1540 kg/m 3 ).…”

Numerical Simulation of Dry Ice Compaction Process: Comparison of Drucker-Prager/Cap and Cam Clay Models with Experimental Results

“…Biszczanik et al" 2021 and 2022, reported on the results of experimental tests of the effect of the value ρ on the value of the Poison's ratio ν and modulus E. Based on the obtained characteristics, the following equations were formulated [21,22]: (3) these equations were used in numerical simulations to describe the change in material behavior in the elastic deformation region.…”

“…where p = − 1 3 trace(σ)¯is the equivalent pressure stress (22) q = 3 2 S : S, ¯is the Mises equivalent stress (23)…”

“…A friction coefficient value of µ = 0.1 was defined in the contact properties [24]. In the next step, the compacted material was ascribed with the parameters determined based on the experimental tests reported by Biszczanik et al 2021 and 2022 [21,22]. The results de- A surface-to-surface contact interaction was defined in the model between the compacted material and the sleeve.…”

Modelling of the Process of Extrusion of Dry Ice through a Single-Hole Die Using the Smoothed Particle Hydrodynamics (SPH) Method

“…Compression of the material reduces the distances between the particles of the material observed as an increase in density ρ. As the value of ρ increases, so do the values of Young's modulus E, Poisson's ratio ν, and coefficient of friction µ [17,20,22]. The behaviour of the compressed material in Phase 2 may be accurately simulated with Drucker-Prager/Cap, Cam-Clay, and Mohr-Coulomb models [23][24][25].…”