William Z. Bernstein, Devarajan Ramanujan, Mikko Koho, Fu Zhao, and Karthik Ramani
Discovering Material Recovery Scenarios for Industrial Machinery
Proceedings of the 2012 ASME MSEC.
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Abstract: Decision-making methodologies for evaluating a product’s end-of-life options have become a significant area of research. Extensive work has been carried out in the area of product recovery, e.g. module-based disassemblability, reverse logistics, remanufacturing, material recyclability, among others. Some of these methods use graphical representations in the form of disassembly trees and/or networks to find feasible solutions with computational approaches, but have not been made applicable to larger, more complex electrohydraulic mechanical systems. The work presented in this paper aims to apply a disassembly assessment technique by comparing a component’s disassembly effort to a reward such as recycling value or energy recovery from recycling. First, the disassembly network is represented by a directed graph where weighted edges represent reward/cost. Next, an implementation of Dijkstra’s algorithm is used to compute the optimal disassembly path that minimizes the sum of the edge weights. Lastly, the optimal disassembly paths for each individual reward are compared to discover the globally optimal disassembly scenario. This method is applied to a real-world case study of an underground mining drill rig with direct contributions from engineers involved in the development of the machine itself. Specific component recovery options are recommended based on the methodology and alternative design practices are suggested to improve product recyclability.


William Z Bernstein
About William Z Bernstein

William Z. Bernstein is currently a D-PhD student in the School of Mechanical Engineering at Purdue. Mr. Bernstein received his Bachelor’s in biomedical engineering from the University of Cincinnati. His graduate research is focused on front-end product design, i.e. understanding designers’ decision making & cognitive load, predicting and then projecting downstream information to the designer, and developing tools that can help implement environmentally conscious decisions early in the design process. He has contributed to manuscripts in the Journal of Mechanical Design, Cleaner Production, Oncogene, and Cancer Research and published conference proceedings at ASME IDETC & MSEC, Design Society’s ICED and CIRP LCE.

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Posted in 2012, DESIGN METHOD, Design Representation, Devarajan Ramanujan, Karthik Ramani, Publications, William Z Bernstein