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prepreg materials

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003032
EISBN: 978-1-62708-200-6
..., used as a layup, provides a structural material with a large variety of epoxies and at least two glass fibers (E and S). Characterization includes mechanical, thermal, and electrical properties. S-glass-fiber-reinforced epoxy resin is used as a filament winding prepreg to manufacture pressure vessels...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.9781627081948
EISBN: 978-1-62708-194-8
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003005
EISBN: 978-1-62708-200-6
... Abstract The selection of engineered materials is an integrated process that requires an understanding of the interaction between materials properties, manufacturing characteristics, design considerations, and the total life cycle of the product. This article classifies various engineered...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003033
EISBN: 978-1-62708-200-6
... at 175 °C (350 °F) and above. Similar examples can be cited for prepreg tape width, resin content, and thickness. The point is that constituent raw-material forms can be adjusted to meet specific requirements. This is important to remember when considering the overall system for producing a...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000629
EISBN: 978-1-62708-181-8
... in short beam shear, compression, and flexure (three-point bending) of woven carbon fabric/phenolic prepreg composite panels. The flat laminate test specimens represent the ablative materials used on the Space Shuttle's solid rocket motor nozzle. Flexure and compression laminates were fabricated from...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003046
EISBN: 978-1-62708-200-6
... selection of the thermoplastic is necessary if solvents are likely to be present. The ideal (future) material for repairing composites should have a significant number of positive characteristics, including, but not limited to, the following: It should be a one-part prepreg, so that repair...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003045
EISBN: 978-1-62708-200-6
... have strict, in-place controls to provide material traceability, conformance to shelf life and out-time specifications, and other procedures to ensure that prepreg materials and adhesives remain suitable for the intended purpose. In general, material control systems conform to MIL-I-45208, MIL-Q-9858A...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003043
EISBN: 978-1-62708-200-6
..., including corrosion compatibility, fastener materials and strength, head configurations, importance of clamp-up, interference fit fasteners, lightning strike protection, blind fastening, and sensitivity to hole quality. Types of fusion bonding are presented, namely, thermal welding, friction welding...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006454
EISBN: 978-1-62708-190-0
... Abstract Acoustic emission is the generation of stress waves by sudden movement in stressed materials. This article begins with a comparison of acoustic emission from most other nondestructive testing (NDT) methods, and discusses the range of applicability of acoustic emission. It describes the...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003041
EISBN: 978-1-62708-200-6
... process prepregs tool materials AUTOCLAVE MOLDING is a process used to impart a controlled heat and pressure cycle cure to a layup. Additional pressure permits higher density and removal of volatiles from the resin. Preparing the layup for autoclave molding is discussed in the section “Materials...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003031
EISBN: 978-1-62708-200-6
... controlled tack and drape (in the case of thermoset matrices), controlled resin flow during the cure process, and, in some processes, better control of fiber angle and placement. Prepreg materials can be produced and stored, normally under refrigeration for thermosetting matrices, and then used in processes...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003037
EISBN: 978-1-62708-200-6
... aligned and within dimensional tolerances. For this reason, subsequently assembled close-outs are frequently used. Some facing materials, however, such as fiberglass prepreg, may be molded or shaped to form a close-out in a single curing operation, when the panel is assembled. Selection of fasteners for...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003036
EISBN: 978-1-62708-200-6
... woven into a very thick fabric, which is used to build up part thickness with a minimum number of plies. These materials are available in large rolls of various widths. The full and partial plies in the part are cut from the prepreg rolls using large scissors, utility knives, clicker dies, or electric...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003039
EISBN: 978-1-62708-200-6
... of high fiber volume Lower cost for large quantity of components Relatively low material costs because fiber and resin can be used in their lowest-cost form (wet wound) rather than in prepreg form Disadvantages: Necessity for a component shape that permits mandrel removal Difficulty...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.9781627081955
EISBN: 978-1-62708-195-5
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003010
EISBN: 978-1-62708-200-6
...: Cyclotrimerization rates are essentially catalyst dependent. A variety of transition metal carboxylates (very active) and chelates (latent) are available to provide a cure response ranging from 1 min (reaction-injection-molding class) to shelf-stable prepregs curing at 177 to 250 °C (350 to 480 °F). Toughness...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003042
EISBN: 978-1-62708-200-6
... eliminate it. Single-layer graphite-epoxy prepregs can be laser cut at a high speed. For 0.1 mm (0.004 in.) thick material, a 1500 W CO 2 laser can cut at 80 m/min (260 ft/min). However, this speed presents severe material-handling problems, especially because prepregs are rather limp. A proposed...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003034
EISBN: 978-1-62708-200-6
... a higher loading of reinforcement. One method is to pull reinforcement from a roving form through a dip tank of resin varnish, evaporate the solvent, and chop to length. Prepreg fabric can also be diced or chopped, with fabric used as the reinforcement. The resultant fabric is in a macerated form...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003040
EISBN: 978-1-62708-200-6
... stability, and damage resistance. Many intricate material placement techniques can be transferred to and modified for composite prepreg fabrication processes. The extension of two-dimensional braiding to three-dimensional braiding has opened up new opportunities in the near-net shape manufacturing of high...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003023
EISBN: 978-1-62708-200-6
... importance of the glass transition as a material property can be understood in terms of the loss of rigidity that accompanies the transition. A drop of several decades in the modulus from a common value of 10 10 Pa (10 11 dynes/cm 2 ) at T g is usually observed above the transition temperature. Hence...