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interlaminar stress

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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
..., discusses the effects of interlaminar free-edge stresses, and explains how to predict the failure of composites using stress and strain criteria as well as the Azzi-Tsai-Hill maximum work theory and the Tsai-Wu failure criterion. laminates ply analysis structural analysis STRUCTURAL ANALYSIS...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870373
EISBN: 978-1-62708-314-0
... modulus, msi 1.16 1.16 1.31 1.31 0° compression strength, ksi 131 36.3 189 232 0° compression modulus, msi 6.09 10.9 16.7 21.8 In-plane shear strength, ksi 8.70 6.53 13.4 13.8 In-plane shear modulus, msi 0.580 0.304 0.638 0.638 Interlaminar shear strength, ksi 10.9...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610377
EISBN: 978-1-62708-303-4
... stages of phase II, as a result of extensive crack coupling, large interlaminar stresses develop at the intersection of the matrix cracks and the longitudinal cracks, leading to the initiation of delaminations. Phase II damage occurs at a slower rate than phase I damage and accounts for the next 70 to 80...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
.... Increases strength and minimizes the tendency to delaminate. Creates a more homogeneous laminate. Minimizes interlaminar stresses. Minimizes matrix microcracking during and after service. 22. If possible, avoid grouping 90° plies. Separate 90° plies by a 0° or ±45° plies where 0° is direction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540319
EISBN: 978-1-62708-309-6
..., interlaminar, and translaminar ( Fig. 8.20 ). The interlaminar (or interply) cracking mode has received the most attention. It is caused by out-of-plane loads that usually occur at structural edges ( Fig. 8.21 ). The primary reason for this type of delamination is that the assumption of plane stress used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780417
EISBN: 978-1-62708-281-5
... Abstract This article depicts typical fractographic features for a number of different composite materials, covering interlaminar and translaminar fracture characteristics in composite materials. fractography composites interlaminar fracture translaminar fracture FRACTURE SURFACES...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860095
EISBN: 978-1-62708-338-6
... in addition to those cited previously, including: Edge effects: Interlaminar stresses, which can precipitate premature failure, arise at the free edge of a laminated composite. This is due to the different behavior tendencies of the multiangle plies interacting in the laminate ( Ref 8.17 ). Fiber...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870351
EISBN: 978-1-62708-314-0
... of different methods for determining the shear properties of composites, including the ± 45-degree tensile coupon, the rail shear test, the Iosipescu shear test, and the interlaminar or short beam shear test. The ideal test for shear is torsion of a thin-walled tube, which provides a pure shear stress state...
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 November 2010
DOI: 10.31399/asm.tb.scm.t52870449
EISBN: 978-1-62708-314-0
... joint will be only about 40 to 50 percent as strong as the base laminate. In spite of this advantage, adhesively bonded joints are not always practical. Bonded joints are preferred if thin composite sections are to be joined where bearing stresses in bolted joints would be unacceptably high or when...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870401
EISBN: 978-1-62708-314-0
... (175 °C); however, epoxies are usually limited to lower usage temperature ranging 225 to 250 °F (105 to 120 °C), where the degradation is more modest but still large enough to be of concern. All matrix-dependent properties are affected. Examples of transverse tensile strength and interlaminar shear...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860081
EISBN: 978-1-62708-338-6
... content of composites has a very pronounced and deleterious effect upon interlaminar shear strength. Figure 7.6 demonstrates the winding of a void-free pressure bottle. Note that this can be a very messy procedure. First, the resin content of the structure is governed by and is very reproducible through...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870001
EISBN: 978-1-62708-314-0
.... When a tensile stress is applied, the square element deforms. Because the stiffness is higher along diagonal AD than along diagonal BC, the length of diagonal AD is not increased as much as that of diagonal BC. Therefore, the initially square element deforms into the shape of a parallelogram. Because...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870307
EISBN: 978-1-62708-314-0
... when fasteners are installed, and such pre-loading can initiate premature fatigue cracking and even stress corrosion cracking of aluminum. However, gaps in composite structures can cause even more serious problems than in metallic structures. Since composites do not yield and are more brittle and less...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290279
EISBN: 978-1-62708-306-5
.... Glass-to-metal seals can be classified in a number of ways. One of the most prevalent methods of classification is based on the level of stress in the glass, for example, matched or balanced, and unmatched or unbalanced. In matched seals, the coefficient of thermal expansion (CTE) of the glass and metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550569
EISBN: 978-1-62708-307-2
...-carrying behaviors. It compares the stress-strain curves for monolithic ceramics and ceramic-matrix composites, noting improvements afforded by the addition of reinforcements. It then goes on to discuss the key attributes, properties, and applications of discontinuously reinforced ceramic composites...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870031
EISBN: 978-1-62708-314-0
..., it does not conform well to complicated shapes and is very difficult to machine. Other high-temperature ceramic fibers, such as silicon carbide (Nicalon), aluminum oxide, and alumina boria silica (Nextel), are frequently used in ceramic-based composites but rarely in polymer-based composites. The stress...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240153
EISBN: 978-1-62708-251-8
... for grain size also exists for the interlaminar spacing in pearlite, with a smaller interlaminar spacing producing a higher yield strength. Thus, strength is related to interlamellar spacing, pearlite colony size, and prior-austenite grain size, with finer sizes giving better properties. The thickness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420143
EISBN: 978-1-62708-310-2
... are determined by the interlamellar spacing. A relationship similar to the Hall-Petch relationship for grain size also exists for the interlaminar spacing in pearlite, with a smaller interlaminar spacing producing a higher yield strength. Thus, strength is related to interlamellar spacing, pearlite colony size...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870063
EISBN: 978-1-62708-314-0
... of the more common design details that can cause out-of-plane loading are shown in Fig. 3.16 . Even under normal in-plane loading conditions, interlaminar shear and normal stresses develop at these locations. These indirect loads can act either alone or in combination with direct out-of-plane loads...