Composites Manufacturing - Materials, Product, and Process Engineering Part 1 pptx

... 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

... mold- ing) process. Materials with embedded sensors are known as “smart” materials. 3. Composite materials have a high specific stiffness (stiffness-to-den- sity ratio), as shown in Table 1. 1. Composites ... 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 proces...

Ngày tải lên: 10/08/2014, 11:22

... isocyanate and polyol are generally mixed in a ratio of 1: 1 in a reaction chamber and then rapidly injected into a closed mold containing short or long fiber reinforcements. RRIM and SRIM processes ... thermoset composites is a complicated process, requiring adhesives and careful surface preparation. Thermoplastic compos- ites typically require higher forming temperatures and p...

Ngày tải lên: 10/08/2014, 11:22

... steel and alumi- num parts with composite materials for fuel and weight savings. The aero- space industry is utilizing more and more composite materials to increase payload capacities and fuel ... initial stage of the design process (conceptual stage), approximate data for wide range of materials is gathered and design options are kept open. Table 3 .1 and Tables 2 .1 and 2....

Ngày tải lên: 10/08/2014, 11:22

... 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...

Ngày tải lên: 10/08/2014, 11:22

... 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...

Ngày tải lên: 10/08/2014, 11:22

... 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...

Ngày tải lên: 10/08/2014, 11:22

... 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 ... models for composites manufacturing processes are described to gain more insight into these manufacturing processes. 7.2 The Importance of Models in Composit...

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. • The finished part should have minimum residual stress to mini- mize part ... debonding 6,7 • Release of volatiles and void growth 8 7.4 Process Models for Selected Thermosets and Thermoplastics Processing For composites processing, various analytic...

Ngày tải lên: 10/08/2014, 11:22