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wet lay-up

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003036
EISBN: 978-1-62708-200-6
...Abstract Abstract Wet lay-up using hand or spray techniques is one of the simplest methods of combining a fiber reinforcement with a solidifying resin to form a composite structure. This article describes several wet lay-up processes - including contact molding, spray molding, vacuum bag...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003398
EISBN: 978-1-62708-195-5
... care. It explains the resin selection in designing the composite for use in a particular application. The article illustrates the various methods that are used to process a composite component, namely, wet lay-up, autoclave, resin transfer molding, and vacuum-assisted resin transfer molding...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003403
EISBN: 978-1-62708-195-5
...Abstract Abstract Composite tooling is the making of tools from composite materials. This article focuses on wet lay-up methods and techniques that are used to fabricate prepreg tooling. It discusses the advantages and disadvantages of composite tools. The article describes the process...
Image
Published: 01 January 2001
Fig. 6 Repair/strengthening of deck using (a) pultruded strips adhesively bonded to the concrete substrate, and (b) unidirectional fabric placed using wet lay-up More
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003482
EISBN: 978-1-62708-195-5
... . In the wet lay-up process, fabric is impregnated on-site and wrapped around a column, with cure generally taking place under ambient conditions. In wet winding, the process of fabrication is automated, but essentially follows the same schema, with the difference being that the ensuing jacket has a nominal...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003451
EISBN: 978-1-62708-195-5
... too large, the part may be beyond economical repair. The larger the repair, the longer the delay that will be incurred in completing it. The types of repair include: Wet lay-up liquid resins (cold or warm-cured) are available. Hot-cured, preimpregnated fabrics or tapes (prepreg...
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
... controlled. Another complication for the glass fabric, wet lay- up technology was its inability to provide laminated components with tightly packed, accurately aligned fibers. The “runniness” of liquid wet lay-up resins cannot hold fibers where placed by laminator tools. To provide a stable material...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003433
EISBN: 978-1-62708-195-5
... documentation is a separate inspection buy-off sheet, which is used when a detailed planning sheet or shop order is not provided to build the tool. In the fabrication of a composite tool, whether graphite-epoxy prepreg or a wet lay-up is used, certain checkpoints can be universally used as inspection...
Book Chapter

By Greg Kress
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003392
EISBN: 978-1-62708-195-5
... methods: Wet lay-up, prepreg lay-up, fiber placement, tape lay-up, pultrusion, resin transfer molding (RTM), vacuum- assisted resin transfer molding, filament winding, compression molding, injection molding, centrifugal casting Processing equipment: Vacuum bagging, molds, ovens, autoclaves, presses...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003414
EISBN: 978-1-62708-195-5
... Recreational boats are made in larger numbers than sailing yachts and are still mainly produced by spray-up or wet lay-up. However, stricter legislation on solvent emissions forces the producers to move toward closed-molding techniques. An example where the producer has shifted from spray-up to vacuum infusion...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003406
EISBN: 978-1-62708-195-5
...-resin materials unsaturated polyester resins epoxy vinyl ester resins fiber reinforced composite laminates material selection OPEN MOLDING, also known as contact molding, open laminating, and wet lay-up, is the method used longest in the polymer-matrix composites industry to make thermoset...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003407
EISBN: 978-1-62708-195-5
... cure wet lay-up, often using a “wet-out” machine, to autoclaved prepregs. The development of specialized materials, particularly lower-temperature cure resins with long out-life and low- temperature cure prepregs, has been a significant factor in the development of current manufacturing techniques...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009071
EISBN: 978-1-62708-177-1
... of prepreg materials, automated tape lay-up of prepreg materials, resin transfer molding, vacuum-assisted resin transfer molding, resin film infusion, wet lay-up, filament winding, pultrusion, and compression molding of sheet molding or bulk molding compound. While these processes are general in description...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003455
EISBN: 978-1-62708-195-5
... pattern that is compatible with bolted holes. Bolted Joint Failure Modes The failure modes of mechanically fastened joints are illustrated in Fig. 4 . The individual mode of failure is dependent upon the joint geometry as well as the lay- up pattern. The strongest joint usually fails by tension...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003411
EISBN: 978-1-62708-195-5
... the fibers (“wet-through” or “wet- out”) affects how well the tape will adhere to the lay-up tool and to itself when laminating subsequent plies. Prepreg with too little resin on the surface of the fibers will not adhere well to itself or to the lay-up surface and will require tape heating to increase...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003459
EISBN: 978-1-62708-195-5
... to note that the original design must allow for the use of bolted repairs, otherwise a significant reduction in design load allowables will result. Bonded (as opposed to bolted) doublers often are used, especially with wet lay-up materials, to perform repairs to lightly loaded, thin laminate...
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
... and fiber orientation or causing a roping (fiber bundling) of the reinforcements. Constituents are not reproducible because undetermined amounts of resin are removed when the release film or backing is separated from prepreg. In general, all the disadvantages of wet lay-up systems are inherent to overly...
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
... epoxy resin. The composites were all fabricated by lay-up of prepreg tape and were autoclave cured 175 °C (350 °F) according to the manufacturer's recommendations. Specimens were then end-tabbed and cut in accordance with the ASTM D3039. The 0° and 90° tensile specimens were tested in accordance...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003362
EISBN: 978-1-62708-195-5
... is inappropriate in a wet lay-up application where low viscosity at room temperature is required. As processing capabilities are developed or modified, new material forms become available. The most commonly used resins can be purchased as powders, liquids, solutions produced from various solvents, and, in some...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003045
EISBN: 978-1-62708-200-6
...-epoxy prepreg or a wet lay-up is used, certain check points can be universally used as inspection verification points through the fabrication of the master model, the pattern taken from it, and the composite tool made from the pattern. Hand-Faired Master Models When building a master model from...