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A modified viscoplastic formulation for large deformations using a bulk modulus approachRusia, Devendra Kumar. January 1987 (has links)
Thesis (M.S.)--Ohio University, August, 1987. / Title from PDF t.p.
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DESIGN OF ARC WELDING PROCESSES: A CAUSAL PERSPECTIVEHo, Yeu-Chuan, 1960- January 1987 (has links)
The ability to make rational decisions based on the synthesis of various pieces of information and to eventually arrive at an integrated design plays a very important role in everyday engineering practice. In this paper, a conceptual framework for manufacturing design is obtained through a causal perspective. This framework is used in developing a knowledge-based system that gains insight into the process of arc welding from a few detailed analyses and experiments on simplified models and rationally arrives at an integrated design of the actual process using a hybrid axiomatic-algorithmic approach for design synthesis. The design strategy presented here may also be applied to any manufacturing process in general.
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A versatile multi-material virtual prototyping systemCheung, Hoi-hoi., 張凱凱. January 2007 (has links)
published_or_final_version / abstract / Industrial and Manufacturing Systems Engineering / Doctoral / Doctor of Philosophy
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A virtual prototyping system with reconfigurable manipulators for layered manufacturingCai, Yi, 蔡毅 January 2011 (has links)
published_or_final_version / Industrial and Manufacturing Systems Engineering / Master / Master of Philosophy
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Modeling and Analysis of Production and Capacity Planning Considering Profits, Throughputs, Cycle Times, and InvestmentSohn, SugJe 12 July 2004 (has links)
This research focuses on large-scale manufacturing systems having a number of stations with multiple tools and product types with different and deterministic processing steps. The objective is to determine the production quantities of multiple products and the tool requirements of each station that maximizes net profit while satisfying strategic constraints such as cycle times, required throughputs, and investment. The formulation of the problem, named OptiProfit, is a mixed-integer nonlinear programming (MINLP) with the stochastic issues addressed by mean-value analysis (MVA) and queuing network models. Observing that OptiProfit is an NP-complete, nonconvex, and nonmonotonic problem, the research develops a heuristic method, Differential Coefficient Based Search (DCBS). It also performs an upper-bound analysis and a performance comparison with six variations of Greedy Ascent Procedure (GAP) heuristics and Modified Simulated Annealing (MSA) in a number of randomized cases. An example problem based on a semiconductor manufacturing minifab is modeled as an OptiProfit problem and numerically analyzed. The proposed methodology provides a very good quality solution for the high-level design and operation of manufacturing facilities.
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