Design for ‘X’-abilities of RTM Products - A Graph Theoretic Approach

Abstract

The resin transfer molding (RTM) process has been widely accepted for fabricating automobile, aircraft, and spacecraft components with high strength and stiffness to weight ratios of the composite products. This process is widely acceptable in various industries, i.e., wherever low manufacturing cost with high mass production is required compared to other processes like compression molding and hand lay-up. Designing the composite products requires a lot of skill with multidisciplinary knowledge. Considering the design and the manufacturing strategies as well as the product development, every aspect of the design is to be considered in a single approach without losing any information. The present approach gives a new methodology for combining all the design aspects together in concurrent design methodology, which finally leads to the achievement of the six-sigma limits i.e., almost defect-free products from the RTM technology. The present paper utilizes the advantages of the graph theoretic approach to considering all the design aspects together in a single methodology with the help of matrix algebra and permanents. It is basically a virtual design methodology, which decides the process, the product strength, and the weakness with the help of a multinomial defined by using the matrix algebra. The design index, developed using the proposed methodology, really decides if the overall design is acceptable or not by considering all the aspects of the design related to the product, process, environment, etc. Finally, a step-by-step procedure is proposed to help generate a new algorithm for software coding.

Investigation of the applicability of Design for X tools during design concept evolution: a literature review

“…Prasad (2000) extended QFD as Concurrent Function Deployment (CFD) to simultaneously consider X-factors. Durai Prabhakaran et al (2006) applied the graph theory in CD phase with DfX factors as vertices and their interdependencies as edges, which form a directed graph. Herrmann et al (2004) observed the difficulty of breaking organisational barriers and suggested that designers, manufacturing engineers and marketing people should have joint responsibility for the product and cross-training to mitigate the boundaries.…”

Design for X-Abilities of a Mechatronic System-A Concurrent Engineering and Graph Theory Based Approach

“…The graph theoretic approach, which consider subsystems and interactions has been extensively applied in various areas such as, structural modeling and analysis of a mechatronic system [17], DFX-based graph theoretic design of RTM products [18], selection of a material for an engineering component [19], etc. Also, there are some contributions on graph base design.…”

Concurrent Design of a Computer Network for x-abilities using MADM Approach

“…Brooks [18] proposed concurrent engineering as one approach that encourages the integration of the engineering functions and their supporting systems and Kuo and Zhang [19] proposed design for x-ability as an approach that simultaneously considers all the design goals and constraints for products that will be manufactured. Durai Prabhakaran et al [20] proposed a new methodology for combining all the design aspects together in concurrent design methodology using the advantages of graph theoretic approach for design of resin transfer molding products.…”