By Niu, Michael C. Y.
This publication is meant to increase the technical realizing and useful wisdom of complicated composites, emphasizing the layout and manufacture of airframe constructions. All facets of composite layout are mentioned in an intensive and rigorous model consisting of instructions, observations, layout elements, execs and cons of layout circumstances, and troubleshooting strategies. one other objective of this ebook is to offer composite designers and engineers a pragmatic layout device, containing huge information and data won from previous adventure and classes realized in layout and fabrication of composite elements that may be used to layout least expensive and weight effective composite buildings with excessive structural integrity. Composite airframe structural layout encompasses just about all the engineering disciplines, and engineers desire hands-on info and information which are technically sound and emphasize rational layout and technical research. This booklet used to be written with that desire in brain.
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Additional resources for Composite Airframe Structures - Practical Design Information and Data
The oil heating devices, sometimes known as Hydrotherm units, are programmable to provide heating or cooling between the temperature range of roughly 60°F (15OC) to 375°F (19OOC) (4) High-velocity jet stream heating (Moen system): With the Moen system, shown in Fig. 8, the laminate part is subjected to high-velocity jets of air and the heat source is brought to the part, rather than the part being brought to the heat source; this heats the part faster and more efficiently and thus, requires less energy.
The “Wet” prepregs compared to “Dry” prepregs are described below: (a) “Wet” Thermoplastic Prepreg Materials Wet matrices include KIII, AIX-159,Torlon 696,etc. 0 Some require post-cure for maximization of Tg Require volatile management during in processing (b) “Dry” Thermoplastic Prepreg Materials More difficult to prepreg than “Wet” Dry matrices have no inherent tack and drape at room temperature Have no shelf life or time constraints Melt fusible, no chemical reaction Solution or hot melt impregnated Amorphous and/or semi-crystalline One of the most critical factors is lack of an extensive database of performance properties over service time.
Stainless steel is used extensively when severe radius forming is required. For a large tool, steel (or titanium) is a better choice than aluminum although still not totally compatible with the thermal expansion of composite structures. Steel has following advantages: High Durability Weldability Repairability Vacuum integrity Concerns are: High initial cost Difficulty of forming into complex curves and shapes Weight In practice, to minimize the mass of the steel tool for relatively simple tools, sheet or plate shock can be machined to the desired configuration.
Composite Airframe Structures - Practical Design Information and Data by Niu, Michael C. Y.