Axiomatic Design and Fabrication of Composite Structures: by Dai Gil Lee

By Dai Gil Lee

The concept fabrics should be designed to fulfill particular functionality necessities is comparatively new. With high-performance composites, even if, the full strategy of designing and fabricating a component might be labored out ahead of production. the aim of this publication is to provide an built-in method of the layout and production of goods from complicated composites. It exhibits how the fundamental habit of composites and their constitutive relationships can be utilized in the course of the layout degree, which minimizes the complexity of producing composite components and decreases the repetitive "design-build-test" cycle. Designing it correct the 1st time goes to figure out the competitiveness of an organization, the reliability of the half, the robustness of fabrication approaches, and finally, the associated fee and improvement time of composite components. such a lot of all, it may extend using complicated composite elements in fields that use composites in simple terms to a restricted volume at the moment. to accomplish those ambitions, this ebook offers the layout and fabrication of novel composite components made for laptop instruments and different functions like robots and automobiles.

This booklet is acceptable as a textbook for graduate classes within the layout and fabrication of composites. it is going to even be of curiosity to working towards engineers studying approximately composites and axiomatic design.

A CD-ROM is incorporated in each replica of the booklet, containing Axiomatic CLPT software program. This application, built by means of the authors, will support readers in calculating fabric homes from the microstructure of the composite.

This e-book is a part of the Oxford sequence on complex production.

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Extra resources for Axiomatic Design and Fabrication of Composite Structures: Applications in Robots, Machine Tools, and Automobiles (Oxford Series on Advanced Manufacturing)

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Solid network cross-linked polymer. 20. 21) and a threedimensional network structure is slowly formed. The resulting material is a solid epoxy resin. Epoxy resins are more expensive and more viscous than polyester resins, making impregnation of fibers more difficult. They are cured at 180 C for aerospace purposes and at between room temperature and 120 C for commercial uses. 19 Schematic representation of a cross-linked polyester resin. 20 Epoxide group and principal ingredients in the preparation of an epoxy matrix: (a) Epoxide group; (b) molecule of diglycidyl ether of bisphenol A (DGEBA), epoxy resin; (c) molecule of diethylene triamine (DETA), curing agent.

However, the stiffness is increased as the weak van der Waals bonding between polymer chains is replaced by the strong cross-links (Matthew and Rawlings, 1994). Also, thermosets may be used at higher temperatures as they have higher softening temperatures and better creep properties than thermoplastics. They are more resistant to chemical attack than most thermoplastics. 1 Thermosets Thermosetting resins are the most common type of matrix system for composite materials because they have low melt viscosity, good fiber impregnation, and fairly 28 AXIOMATIC DESIGN AND FABRICATION OF COMPOSITE STRUCTURES low processing temperatures.

0 Â 10À6/K, slightly negative). However, they have low electrical and thermal conductivity and high thermal capacity, which can be advantageous or disadvantageous. 3 Matrices The matrix in a fiber-reinforced composite transfers stresses between the fibers and protects the surface of the fibers from mechanical abrasion and adverse environments. The matrix transmits the tensile load little, but has a major role on the interlaminar shear strength and in-plane shear strength. The interlaminar shear strength and stiffness are important design considerations under bending loads and bending vibrations, whereas the in-plane shear strength is important under torsional loads.

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