Composites Manufacturing - Materials, Product, and Process Engineering Part 12 doc

... Metals 1. 1.2 Plastics 1. 1.3 Ceramics 1. 1.4 Composites 1. 2 What Are Composites? 1. 3 Functions of Fibers and Matrix 1. 4 Special Features of Composites 1. 5 Drawbacks of Composites 1. 6 Composites Processing 1. 7 ... Manufacturing Processes 11 .6 .1 Hand Lay-up Technique for Aerospace Parts 11 .6.2 Filament Winding for Consumer Goods 11 .6.3 Compression Molded SMC...

Ngày tải lên: 10/08/2014, 11:22

... dimen- sional stability. 8. Net-shape or near-net-shape parts can be produced with composite materials. This feature eliminates several machining operations and thus reduces process cycle time and ... dimen- sional stability. 8. Net-shape or near-net-shape parts can be produced with composite materials. This feature eliminates several machining operations and thus reduces process cy...

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... application, design and manufacturing consider- ations begin. 3. 2 The Need for Material Selection With the technological advancements, new material systems and processes are being developed and are growing ... thermoset composites is a complicated process, requiring adhesives and careful surface preparation. Thermoplastic compos- ites typically require higher forming temper...

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... choice. Similarly, for a manufacturing process, one specific type of material system may be more appropriate than the other. For a manufacturing process, if the engineer selects a particular raw material, ... literature, suppliers’ brochures, and handbooks. In the published literature, single-value data is given on the property without any standard deviation. During the final design pr...

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... braiding would impart distinct stiffness, damping, and mass characteristics due to different fiber and resin distribu- tions and fiber volume fractions. Composites manufacturing processes create distinct ... metals, standard sizes of blanks, rods, and sheets are machined and then welded or fastened to obtain the final part. In composites, machining of standard-sized sheets or bla...

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... â 2002 by CRC Press LLC FIGURE 6. 6 Tooling for carbon fiber tennis racquet. (Courtesy of Radius Engineering, Inc.)

Ngày tải lên: 10/08/2014, 11:22

... Making of the Part The processing steps used in the spray-up process are very similar to those in the wet lay-up process. In this process, the release agent is first applied to the mold and then ... in this process is identical to that used in the wet lay-up process. Male and female molds are used, depending on the application. Tubs and showers utilize male molds, whereas boat...

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... and then forming it under heat and pressure. Once a shape is formed, the preform maintains its shape. In conformal mats, fabrics or chopped strand mats are placed on the outer layer and spun-bonded ... to the desired size and formed under heat and pressure to the shape of the mold. In this process, scraps are produced to get the final shape preform because complicated three-dimensio...

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... pre-cut, pre-weighed pieces of sheet composite materials, called blanks, for processing. TABLE 6.6 Part Cycle Time for Various Manufacturing Processes Manufacturing Process Part Cycle Time (s) Compression molding ... manufacturing processes. 7.2 The Importance of Models in Composites Manufacturing A process model is very helpful in analyzing a manufacturing process,...

Ngày tải lên: 10/08/2014, 11:22

... the part. Similarly, for thermoplastic composites, uniform cool- ing should take place to avoid residual stress build-up. ã The nished part should have minimum residual stress to mini- mize part ... debonding 6,7 ã Release of volatiles and void growth 8 7.4 Process Models for Selected Thermosets and Thermoplastics Processing For composites processing, various analytica...

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... figures that the calculated and measured temperatures FIGURE 7.25 Theoretical and experimental plots of temperature as a function of time at three positions inside a 64-ply composite. The temperature ... cycle is shown in Figure 7.29. The cure and bleeder pressures were constant at 586 kPa (85 psi) and 101 kPa (14.7 psi), respectively. (Reprinted from Loos, A.C. and Springer, G.S., J...

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... McGraw-Hill, New York, 1974, 336–337. 26. Dara, P.H. and Loos, A.C., Thermoplastic Matrix Composite Processing Model, Center for Composite Materials and Structures, Report CCMS-8 5-1 0, VPI-E-8 5- 21, ... labor-intensive process; a special proce- dure is followed to make the joint. 3. Joints add manufacturing time and cost to the structure. In an ideal product, there is only o...

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... 2 are the stiffnesses and thicknesses of the adherend materials 1 and 2, respectively). Mazumdar and Mallick 1 conducted a series of tests on SMC-SMC and SRIM- SRIM joints to determine ... 2 are the stiffnesses and thicknesses of the adherend materials 1 and 2, respectively). Mazumdar and Mallick 1 conducted a series of tests on SMC-SMC and SRIM- SRIM joints...

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... boron/epoxy, and hybrids of graphite/epoxy and FIGURE 10.5 Schematic of waterjet cutting equipment. (Adapted from Hurlburt, G.H. and Cheung, J.B., Waterjet Cutting of Advanced Composite Materials, ... Advanced Composite Materials, SME Technical Paper No. MR7 7-2 25, So- ciety of Manufacturing Engineers, 1997.) Water inWater in 30 GPM pump 4-way valve Large piston Small piston...

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... affected where soil and bacterial corrosion might apply (Ref 72). Design and Materials Selection Corrosion control measures are best initiated at the design stage (Fig. 27). Materials are usually ... International, 1973, p 2 Design for Corrosion Resistance F. Peter Ford and Peter L. Andresen, General Electric Corporate Research and Development Center; Peter Elliott, Cor...

Ngày tải lên: 11/08/2014, 14:20