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curved laminates

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Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002478
EISBN: 978-1-62708-194-8
... laminates; and curved laminates. It provides information on controlled thermal expansion composites, metal-matrix composites, and ceramic-matrix composites. The article illustrates the types of bonded joints and concludes with a discussion on design for manufacturing. asymmetric in-plane laminates...
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Published: 01 January 2001
Fig. 4 A curved laminate “C” channel in various loading conditions. (a) Unloaded. (b) Radii open under tensile load. (c) Radii close under compressive load More
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Published: 01 January 2001
Fig. 5 Development of radial stresses in a curved laminate. (a) The force couples (– P , + P ) act on the curved laminate. (b) The radial stresses (σ r ) must balance the vertical components of these loads. More
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Published: 01 January 2001
Fig. 6 Combined loads acting on a curved laminate. P , in-plane load; V , shear load; M , end moment; p i , surface pressure More
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003387
EISBN: 978-1-62708-195-5
..., the strength analyst must be cognizant of cases where primary loads in the plane of the laminate induce secondary loads that act in the through-thickness direction. Such cases include free-edge stresses in cross-plied laminates under axial loads, radial stresses in curved laminates subject to tangential loads...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002416
EISBN: 978-1-62708-193-1
... in compressive strength and tensile strength. The article reviews low velocity impacts in aircraft structures in terms of resin toughness, laminate thickness, specimen size and impactor mass, and post-impact fatigue. It explains the tension strength analysis, such as linear elastic fracture mechanics and R-curve...
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Published: 01 January 1996
Fig. 6 S-N curves for (a) various AS4-epoxy laminates and (b) glass-fiber polymer laminates at various ply orientations. Source: (a) Engineered Materials Handbook, Vol 1, Composites, ASM International, 1987, p 438 and (b) C. Osgood, Fatigue Design, 2nd ed., 1982, Pergamon Press, p 530 More
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Published: 01 January 1996
Fig. 28 R-curve for [ + 45/0/90/ + 30/ 0 ] s AS4/938 fuselage crown laminate (2 a o = 23 cm and W = 91 cm) More
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Published: 01 January 1996
Fig. 31 R-curves for [ + 45/0/90/ + 30/ 0 ] s AS4/938 fuselage crown laminates with various cut lengths. W ≥ 8 a o More
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003382
EISBN: 978-1-62708-195-5
... [0°/±45°/90°] 2s laminates. Although some correlation has been made between unidirectional fatigue behavior and that of multidirectional laminates, it is best to characterize laminates of interest rather than infer S - N curves from unidirectional data. This is in part due to the acceleration...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003465
EISBN: 978-1-62708-195-5
... there is a threefold difference in CTE at this point in the TMA curve ( Ref 1 ). Figure 4 shows measurement of the expansion coefficient and the T g in a printed circuit board (PCB) laminate, where the signal is affected by an enthalpic relaxation effect due to stress induced by processing (lower curve...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003378
EISBN: 978-1-62708-195-5
.... It explains the development of the relations between mid-surface strains and curvatures and membrane stress and moment resultants. The article discusses the properties, such as thermal expansion, moisture expansion, and conductivity, of symmetric laminates and unsymmetric laminates. It describes...
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
... an external, rotatable feed table, picked up with a vacuum chuck, and shuttled to the mandrel. A flexible thermoforming mechanism laminates each new layer to the curved mandrel with steady, uniform vacuum pressure and heat. After the laminator retracts, a CO 2 laser cuts each layer, accounting for the sloped...
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Published: 01 January 2001
Fig. 24 S - N curve comparing blind fasteners with screws and nutplates in composite laminate More
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
...Abstract Abstract Continuous fiber composite materials offer dramatic opportunities for producing lightweight laminates with tremendous performance capabilities. This article describes the kinematics of fabric deformation and explains the algorithms used in draping simulation. It discusses...
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Published: 01 January 1996
Fig. 30 Predicted failing strains using R-curve and LEFM for [ + 45/0/90/ + 30/ 0 ] s AS4/938 fuselage crown laminates. W ≥ 8 a o More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003044
EISBN: 978-1-62708-200-6
...Abstract Abstract Testing of fiber-reinforced composite materials is performed to determine uniaxial tensile strength, Young's modulus, and Poisson's ratio relative to principal material directions, that helps in the prediction of the properties of laminates. Beginning with an overview...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002415
EISBN: 978-1-62708-193-1
... data analysis fatigue life fatigue stress fiber break GLARE laminates interface debonding layer cracking life prediction notched specimens S-N curves unnotched specimens Weibull distribution KNOWLEDGE of fatigue behavior at the laminate level is essential for understanding the fatigue...
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Published: 01 August 2018
Fig. 24 Leaky Lamb wave characterization. (a) The reflection at 39.5° incidence angle and the dispersion curve for a graphite/epoxy [0] 24 laminate with no defects. (b) Response at a defect area where simulated porosity was introduced in the middle layer using microballoons More
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Published: 01 January 2001
Fig. 5 Matrix cracks related to the proportional limit stress and onset of nonlinearity of the stress-strain curve; arrows indicate matrix cracks in 0°/90° laminate Nicalon fiber reinforced CAS glass-matrix composite. Source: Ref 4 More