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prepreg plies

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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
... four prepreg plies; shear specimens, from nine. Prepreg layups were vacuum bagged and cured for 5 h at 155 °C (310 °F) and 7 MPa (100 psi). Each pair of photos shows specimens before and after testing. The orientation is edge-on (parallel to the plane of the laminate). Surfaces were milled. Fig. 1311...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003033
EISBN: 978-1-62708-200-6
... describes the functions, types, and chemical composition of fiber sizing agents. The article discusses the styles, properties, applications, and weaving methods of unidirectional, two-directional and multidirectionally reinforced fabrics. The article also reviews the use of prepreg resins in aerospace and...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003036
EISBN: 978-1-62708-200-6
... lamination are each described in the articles that follow. The development of systems to lay tape in the flat began about the same time that programs were first initiated to evaluate advanced fibers using tape prepregs. The original concept was to prepare groups of plies in the flat and manually place them...
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
... hybridization, in which multiple fibers are introduced into the laminate. For example, when viscoelastic polyethylene fibers are used with graphite fibers, a tough interply hybrid laminate can be produced. Other forms of hybridization, such as adhesive layers of film between prepreg plies, also show promise...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003045
EISBN: 978-1-62708-200-6
... fabric at all ply orientations and for tape in a 0° direction. Butt-strap splice is used for fabric in which only warp or fill fibers have been cut. Tape prepreg is aligned parallel to the cut fibers. When multiple patterns and discontinuous plies are used in a lay-up, a certain ply may exist only...
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
... the surface of the laminate, with edge bleeding being minimized by properly damming the layup edges. Personnel should establish tables giving plies of bleeder per ply of layup for each prepreg material. These tables are often set up for a particular bleeder material, and then equivalencies are given...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003046
EISBN: 978-1-62708-200-6
... skins can allow moisture ingression in the underlying honeycomb. Large-part or large-area repair can require replacement of the part or removal for remanufacturing. For damage over a smaller area, operators use prepregs and wet lay-up techniques in bonded, bolted, or flush aerodynamic patching ( Ref 15...
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 Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.9781627081955
EISBN: 978-1-62708-195-5
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003031
EISBN: 978-1-62708-200-6
... winding. In lay-up, material that is usually in prepreg form is cut and laid up, layer by layer, to produce a laminate of the desired thickness, number of plies, and ply orientations. In filament winding, a fiber bundle or ribbon is impregnated with resin and wound upon a mandrel to produce a simple shape...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003032
EISBN: 978-1-62708-200-6
... planes, can also be woven with more threads per inch to achieve a high density. Satin weaves are used to best advantage in the reinforced plastic field, especially for prepregs for aircraft and missiles. Satin weave fabrics require more threads per inch to retain stability and are generally produced in...
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.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 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.a0003043
EISBN: 978-1-62708-200-6
... and delamination of the last one or two plies. Damage due to overheating is not always visible to the mechanic. Installation of certain types of blind fasteners will render this damage visible by distorting the surface of the blind side. Joints in which the matrix material has been overheated will...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003063
EISBN: 978-1-62708-200-6
.... Fugitive fiber weaves can be used to establish fiber spacing and positioning for unidirectional preforms and individual unidirectional plies. Crossed plies of unidirectional fibers or layers of fabrics can also be used as architectures. Braids, angle interlocks, and orthogonal three-dimensional weaves...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003009
EISBN: 978-1-62708-200-6
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003005
EISBN: 978-1-62708-200-6
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003047
EISBN: 978-1-62708-200-6