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Thesis
Modeling roll compaction mechanics with multi-particle finite element methods
Master of Science (M.S.), Drexel University
Sep 2013
DOI:
https://doi.org/10.17918/etd-7131
Abstract
Roll compaction is a mechanical processing technique implemented in a wide range of industries including pharmaceutical, food production, chemical, and mining. Due to the large scale and continuous nature of the process, optimization and mechanistic understanding is of great importance. In the past, experimental procedures, continuum models, and finite element methods have been applied in order to analyze the mechanics of roll compaction, and each study has experienced its own set of limitations in regards to its predictive capacity and practical application. The difficulties have primarily included the large number of input parameters and the complex behavior of particle interactions at the local level such as friction, cohesion, segregation, and deformation. A modern technique, Multi-Particle Finite Element Methods (MPFEM), is employed to offer new insights into the roll compaction process. A two-dimensional model is developed and used to simulate the mechanical response of individual particles during deformation. The effects of parameters such as friction, feed stress, roll speed, density, and velocity fields are observed and investigated at both the macro and particulate levels. Shear banding between the rolls and particle shape behavior are investigated and determined to be crucial factors in roll compaction analysis. The implementation of MPFEM is a new sophisticated tool for evaluating roll compaction and presents significant insight into an important mechanical process.
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Details
- Title
- Modeling roll compaction mechanics with multi-particle finite element methods
- Creators
- George Robert Weber - DU
- Contributors
- Antonios Zavaliangos (Advisor) - Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Master of Science (M.S.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- viii, 88 pages
- Resource Type
- Thesis
- Language
- English
- Academic Unit
- Materials (Science and) Engineering (Metallurgical Engineering) [Historical]; College of Engineering (1970-2026); Drexel University
- Other Identifier
- 7131; 991014632689504721