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prepregs

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Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003408
EISBN: 978-1-62708-195-5
...Abstract Abstract This article reviews the history of prepreg and ply cutting technologies and outlines the options available for creating the necessary data and for nesting, cutting, and kitting the plies. It discusses the ways in which these steps influence the workflow for various...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003409
EISBN: 978-1-62708-195-5
...Abstract Abstract The prepreg hand lay-up process is a versatile, reliable, cost-effective, and high quality process for fabricating large or small components. This article discusses the technique characteristics and applications of the process. It describes the stages involved in the process...
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Published: 01 December 2004
Fig. 13 Polished uncured prepreg materials that were made with different prepreg processing conditions. Bright-field illumination, 25× objective More
Book Chapter

Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003360
EISBN: 978-1-62708-195-5
...; multidirectionally reinforced fabrics; hybrid fabrics; woven fabric prepregs; unidirectional and multidirectional tape prepregs; and the prepreg tow. The article discusses three major categories of tape manufacturing processes, namely, the hand lay-up, machine-cut patterns that are laid up by hand, and the automatic...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009074
EISBN: 978-1-62708-177-1
... preparation of unstaged and staged prepreg materials for optical analysis. boron fiber composites grinding mounting optical analysis polishing prepreg materials sample preparation sectioning titanium honeycomb composites titanium/polymeric composite hybrids METHODS AND MATERIALS most...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009077
EISBN: 978-1-62708-177-1
... performance. This article describes the optical microscopy and bright-field illumination techniques involved in analyzing ply terminations, prepreg plies, splices, and fiber orientation to provide the insight necessary for optimizing composite structure and performance. bright-field illumination...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003419
EISBN: 978-1-62708-195-5
... compound (randomly oriented, continuous or discontinuous reinforcement at a volume fraction typically in the range 0.1 to 0.3, reinforcement partly or completely impregnated) Prepreg (short for preimpregnated reinforcement; oriented and usually continuous reinforcement at a volume fraction up to 0.6...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009083
EISBN: 978-1-62708-177-1
... geometric structure of a beehive, the honeycomb core imparts strength and light weight to sandwich panels, while supporting the prepreg skins. The honeycomb sandwich structure composite has high compressive strength in the direction of the cell walls and high shear strength in the plane perpendicular...
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Published: 01 December 2004
Fig. 5 Cross section of uncured prepreg material showing unimpregnated areas (dark) and impregnated areas (gray). Bright-field illumination, 25× objective More
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Published: 01 December 2004
Fig. 14 Cross section of a carbon fiber prepreg skin-film adhesive co-cured honeycomb composite showing two fillet regions. A few voids are shown in the adhesive areas. Bright-field illumination montage, 5× objective More
Image
Published: 01 December 2004
Fig. 12 Polished stack of prepreg that was bonded with “5 min epoxy” and then staged in an oven at 60 °C (140 °F) for 2 weeks. This micrograph is of 4 1 2 plies of polished prepreg taken from the 20-ply mount. Bright-field illumination, 10× objective More
Image
Published: 01 January 2001
Fig. 4 Robo-Wrapper machine for winding columns with prepreg carbon tows. Courtesy of XXsys Technologies, Inc. More
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Published: 01 January 2001
Fig. 5 Portable oven (Robo-Curing System) for curing columns wound from prepreg carbon tows. Courtesy of XXsys Technologies, Inc. More
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Published: 01 January 2001
Fig. 3 Columns on the Santa Monica viaduct wrapped with carbon/epoxy prepreg More
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Published: 01 December 2004
Fig. 3 Composite part made from unidirectional prepreg showing a large quantity of voids in the cured structure. Bright-field illumination, 5× objective More
Image
Published: 01 December 2004
Fig. 6 Cross section of a composite part made with glass fabric prepreg and two unidirectional carbon fiber prepreg materials having different thicknesses (areal weights) and fiber types. Slightly uncrossed polarized light, 10× objective More
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Published: 01 December 2004
Fig. 2 Laminate made with unidirectional carbon fiber prepreg and woven carbon fabric prepreg plies. Voids are shown in the woven fabric area at the bottom of the composite part that was against the tool surface during cure. Bright-field illumination, 65 mm macrophotograph More
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Published: 01 December 2004
Fig. 7 Large void at the termination of two prepreg plies. Slightly uncrossed polarized light, 10× objective More
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Published: 01 December 2004
Fig. 9 Glass fabric prepreg honeycomb core composite with voids throughout the structure. Bright-field illumination, 5× objective More
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Published: 01 December 2004
Fig. 4 Solvent-generated voids in the prepreg skins and fillet areas of a honeycomb sandwich structure composite. (a and b) Bag side. (c) Tool side. Epi-bright-field illumination, 5× objective. In these micrographs, there is evidence of some scratching on the polished surface. This is due More