1-20 of 167 Search Results for

fiber placement

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Book Chapter

By Don O. Evans
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003410
EISBN: 978-1-62708-195-5
...Abstract Abstract This article schematically illustrates a fiber placement system and provides information on the applications of fiber placement. It discusses materials and design considerations for fiber placement. The article provides information on techniques that can be used to eliminate...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003394
EISBN: 978-1-62708-195-5
... interface, the resin transfer molding interface, the fiber placement and tape-laying interface, and the laser projection interface. continuous fiber composite material fabric deformation core sample flat-pattern evaluation laminate surface offset structural analysis interface resin transfer...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003434
EISBN: 978-1-62708-195-5
.... It concludes with a discussion on automated tape laying and fiber placement, as well as the numerically aided lay-up process. in-process inspection composite materials lay-up material control quality control automated tape laying fiber placement numerically aided lay-up IN-PROCESS INSPECTION...
Book Chapter

By John E. Moalli
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003461
EISBN: 978-1-62708-195-5
..., placement of them within the composite can be critical. In a thin, unidirectional laminate, for example, a variation in fiber orientation as small as 15° can reduce the laminate strength by a factor of 2. In some cases, random fiber placement is desired to produce a more isotropic structure. Flow-induced...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003368
EISBN: 978-1-62708-195-5
... be heated to as much as 500 °C (932 °F). This causes local melting and fusion of the resin to the ply below. Fiber placement processes can be used to create a part using slit tape or tow prepreg. The entire surface of the slit tape or tow is heated as it is being laid, fusing it to the layer below...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003425
EISBN: 978-1-62708-195-5
..., fiber placement, filament winding, and contoured tape laying have systematically reduced the cost of fabricating parts using traditional thermoset (TS)—materials that undergo chemical reaction during cure—resin systems. There remain, however, pocket applications that require better target properties...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003031
EISBN: 978-1-62708-200-6
... 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 ranging from hand lay-up to highly...
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.a0003409
EISBN: 978-1-62708-195-5
..., such as small aircraft and helicopter fuselages, the fiber placement process as developed by Alliant Techsystems, Cincinnati Milacron, and Boeing will become further established (see the article “Fiber Placement” in this Volume). There are two apparent trends for prepreg manufacture to further reduce...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003350
EISBN: 978-1-62708-195-5
... applications also provide attractive performance in these other functional areas as well. As a result, this simple definition for structural composites provides a useful definition for most current functional composites. Thus, composites typically have a fiber or particle phase that is stiffer and stronger...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003401
EISBN: 978-1-62708-195-5
... covered in the present edition also were described in the 1987 edition, some techniques now covered are new (vacuum infusion and several thermoplastic techniques), and a couple that previously were reported as representing recent developments are now well established (fiber placement and tape laying...
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
... costs of filament winding for a graphite-epoxy composite compared with other fabrication methods The advantages and disadvantages of filament winding, compared with other compacting and curing processes, are: Advantages: Advantages: The highly repetitive nature of fiber placement (from...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003416
EISBN: 978-1-62708-195-5
... be combined with an inexpensive resin to yield a relatively inexpensive composite. Also, cost reductions accrue because of the high speed of fiber lay-down. Other advantages of filament-winding compared to other compacting and curing processes are: Highly repetitive and accurate fiber placement...
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
... are usually flat-to-medium contour and fall into part categories mentioned earlier. Highly contoured aircraft parts such as fuselages, inlet ducts, nose cones, nozzles, sponsons, rotor blade grips, and so on are better suited for fiber placement than tape laying. When considering automated tape lay-up...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003474
EISBN: 978-1-62708-195-5
... are similar in that fibers are precoated with resin by the fiber manufacturer or are coated in the fabrication process just before the fiber-placement operation. The parts are then cured, either in a mold or on a supporting surface. The fiber-placement techniques have evolved to high-volume processes...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003395
EISBN: 978-1-62708-195-5
... of automated tape laying and fiber placement, significant programming and capital investment. Mixing the reinforcement with the resin system in situ during the fabrication process allows for three-dimensional reinforcements or continuous processing while increasing material utilization. In wet filament...
Book Chapter

Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003377
EISBN: 978-1-62708-195-5
... in geometrically statistically homogeneous specimens subjected to homogeneous boundary conditions. Consequently, effective elastic properties are defined by relations between average stress and average strain. A typical transverse section of a UDC shows random fiber placement; hence, the material...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003036
EISBN: 978-1-62708-200-6
... placement degrade the physical properties. Spray lay-up techniques produce better wetting of the fiber and fewer voids in the part. Composite parts made by this method are usually lighter and more corrosion resistant than the same structures made from metals. A complex part that consists of a number...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003397
EISBN: 978-1-62708-195-5
.... Solid Freeform Fabrication Symposium , Aug 1999 ( Austin, TX ), University of Texas, p 401 – 409 24. Benjamin W.P. , The Fiber Placement Path Toward Affordability , SAMPE J. , Vol 34 ( No. 3 ), May/June 1998 25. Wohlert M. and Bourell D.L. , Rapid Prototyping...
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
... 12 ) (see Fig. 3 ). The hull consists of a gelcoat, unsaturated polyester resin, multiaxial glass fiber reinforcements, and a balsa core. To facilitate placement of the core in the female mold, contoured sheets of balsa are used. Slits in the balsa open up when the contoured sheets are bent...