1-20 of 22 Search Results for

quasi-isotropic laminate

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
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870001
EISBN: 978-1-62708-314-0
..., and orthotropic materials, the orientation of plies in unidirectional (lamina) and quasi-isotropic (laminate) lay-ups, and the dominant role of fibers in determining strength, stiffness, and other lamina properties. The chapter also compares the engineering attributes of composites with those of metals...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870449
EISBN: 978-1-62708-314-0
... concentration remains high. The stress concentration is reduced somewhat due to localized delaminations around the fastener hole, but the reduction is small compared to the gross yielding that occurs in metallic alloys. In addition, nearly quasi-isotropic laminates with 0°, ± 45°, 90° orientations are required...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610377
EISBN: 978-1-62708-303-4
...°, +45°, –45°, and 90° directions is called a quasi-isotropic laminate, because it will carry equal loads in all four directions. Fig. 5 Laminate construction. Source: Ref 1 The physical characteristics of composites and metals are significantly different. A comparison of some...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870421
EISBN: 978-1-62708-314-0
... but is not symmetric. However, it could be made symmetric by reordering the stacking order to [0°, 30°, –30°, –30°, 30°, 0°]. A quasi-isotropic laminate is made up of three or more plies of identical materials and thicknesses with equal angles between each ply and the next. If the total number of plies is n...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540319
EISBN: 978-1-62708-309-6
.... The prepreg (preimpregnated) tapes can be stored in a refrigerator for future use. In making a composite laminate, the prepreg tapes are stacked together and cured in an autoclave under controlled time, temperature, and pressure. Fig. 8.2 Unidirectional versus quasi-isotropic layups Both...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
...—Bolted and Bonded,” the joints are the critical areas. They should be designed first and then the space between them should be filled in with appropriate laminates. Since most composite structures have some type of mechanically attached joints, the use of quasi-isotropic or near-quasi-isotropic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870351
EISBN: 978-1-62708-314-0
... that of the bolt diameter. A 0.25 in. (0.6 cm) diameter hole is the most common size. Quasi-isotropic or other lay-ups representative of actual structure are tested. The load-versus-head deflection is typically recorded. Flatwise tension testing of composite laminates is covered in ASTM D 7291. Either...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550621
EISBN: 978-1-62708-307-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860115
EISBN: 978-1-62708-338-6
...: The primary reason for using composites is their higher strength-to-weight ratios over those of isotropic materials. The performance of RMCs and pressure vessels can be ranked by using the performance factor (N). It is sometimes called pressure vessel efficiency: (Eq 9.1) N = P V w where P...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
... the fibers in tension and stabilizes and prevents the fibers from buckling in compression. The matrix is also the primary load carrier for interlaminar shear (i.e., shear between the layers) and transverse (90°) tension. Fig. 8.12 Unidirectional and quasi-isotropic laminate lay-ups. Source: Ref 8.1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860095
EISBN: 978-1-62708-338-6
... characteristics of composites. This chapter describes suitable static mechanical test techniques for characterizing laminated composite materials. The approach is to provide recommended techniques, based on consensus opinions of fabricators and users of filament-wound composites, and to survey available...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.9781627083096
EISBN: 978-1-62708-309-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870373
EISBN: 978-1-62708-314-0
... mechanisms: matrix cracking, fiber fracture, crack coupling, delamination initiation, and delamination growth and fracture. The damage state versus percent of life in a quasi-isotropic subjected to tension-compression fatigue loading during the three phases of damage progression is illustrated in Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.9781627083386
EISBN: 978-1-62708-338-6
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870101
EISBN: 978-1-62708-314-0
.... The predominant reinforcements are twill, plain, or satin weave carbon or glass fabrics. Balanced, symmetric quasi-isotropic lay-ups are normally used where the plies are cut into large rectangles and then butt spliced during lay-up. Finer fabrics can be used on the surface to improve the surface finish, while...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290279
EISBN: 978-1-62708-306-5
... of composites and their fasteners, thus altering clamp-up loads. Therefore, all new joint designs should be thoroughly tested to ensure satisfactory service. When a hole is placed in a composite laminate, it creates a stress concentration and the overall load bearing capability of the laminate is severely...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230209
EISBN: 978-1-62708-298-3
... obtained for grade S-200F. The main difference between the two grades is in the oxide content; of the two grades, S-65C has the lower BeO content. It may be that the S-65C grade was compacted using better technology than that used for the S-200F grade resulting in a more isotropic product. The properties...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
.... , Orientation of Cleavage Facets in Tempered Martensite (Quasi-Cleavage) by Single Surface Trace Analysis , Metall. Trans. , Vol 4 , 1973 , p 1999 – 2000 10.1007/BF02665434 2.21. Briant C.L. and Banerji S.K. , Intergranular Fracture in Steel: The Role of Grain-Boundary Composition...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
... the speed of the electric motor and by changing the gear ratio. Conventional gear-driven systems are generally designed for speeds of approximately 0.001 to 500 mm/min (4 × 10 –6 to 20 in./min), which is suitable for quasi-static (slow strain rate) testing. Fig. 7.11 Components...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.9781627082587
EISBN: 978-1-62708-258-7