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interlaminar failure

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Published: 01 January 2000
Fig. 49 Effect of strain rate on the interlaminar failure stress and strain More
Image
Published: 01 January 2001
Fig. 19 Fatigue striations in the resin of an interlaminar failure, following mode I loading of a carbon/PEEK composite laminate. 900× More
Series: ASM Handbook Archive
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000625
EISBN: 978-1-62708-181-8
... the ductile fracture, interlaminar failure, transgranular cleavage and fracture, tension-overload fracture, longitudinal and transverse cracking, fiber splitting, stress rupture, and low-cycle fatigue of these composites. ductile to brittle transition fractograph metal-matrix composites tensile...
Image
Published: 01 January 2001
Fig. 6 Schematic of mode II interlaminar shear failure More
Image
Published: 01 January 1987
arrays for 30 min at 69 MPa (10 ksi) and 480 °C (895 °F). Tensile strength of the metal-matrix composite was in close agreement with rule-of-mixture values. (Compare with Fig. 1256 and 1257 .) Fracture surface reveals interlaminar failure of the aluminum matrix (features of this type are usually 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
... is delamination. However, the S - N data of Fig. 4 and 5 represent in-plane axial loading and provide little use in characterizing interlaminar failure. Thus, it is prudent to develop S - N relationships between interlaminar stresses and interlaminar failure. Experience has shown that three- or four...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003466
EISBN: 978-1-62708-195-5
.... Further examination and analysis of the fractographs were then conducted in order to define the specific fractographic features that were indicative of a specific material, processing, environmental, or load condition at failure. Interlaminar Fracture Features An interlaminar fracture occurs when...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003330
EISBN: 978-1-62708-176-4
... concludes with a discussion on the split-Hopkinson pressure bar test. compression testing fatigue testing fiber-reinforced composites flexure testing interlaminar failure mechanical properties mechanical testing nondestructive techniques shear testing split-hopkinson pressure bar test strain...
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
..., excessive applied torque in bolted joints not only can cause visible bearing failures, but subsurface interlaminar failures can also be induced. Because these failures are not readily observed, they tend to be more insidious as they can propagate without notice. As mentioned previously, the temperature...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003380
EISBN: 978-1-62708-195-5
... Abstract Delamination is one of the most commonly observed failure modes in composite materials. This article describes the three fundamental fracture failure modes of composite delamination, namely, opening, in-plane shearing, and tearing or scissoring shearing modes. It discusses...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003462
EISBN: 978-1-62708-195-5
... to enhance this type of damage is often important in defining the depth of the interlaminar damage in a specimen prior to ultimate failure. Fig. 3 Penetrant-enhanced radiograph revealing the microcracking and edge delaminations in a tensile test specimen In addition to dye-penetrant-aided x...
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 problem is that the parabolic distribution is assumed when backing the interlaminar strength out of the failure load. A better approach would be to perform an analysis that accounted for the beam being orthotropic, and using the resulting distribution to determine the peak stress at failure. Methods...
Image
Published: 01 January 2001
Fig. 6 The compression after impact (CAI) failure sequence. (1) At the beginning of the load cycle the damaged laminate remains stable. (2) The strain level becomes high enough to initiate buckling at one or more of the delamination interfaces, resulting in a thin, buckled sublaminate More
Image
Published: 01 January 2001
Fig. 7 Comparison between the transverse tensile and flexural properties for [90] 12 and the short beam shear strength of A-4 carbon-fiber-epoxy composites. The flexural strength is much higher than the tensile strength. The interlaminar shear strength and transverse tensile and flexural More
Image
Published: 01 January 2002
Fig. 8 (a) Schematic of basic wear failure mechanisms observed in (a1) (a2) parallel, P and (a3) antiparallel AP orientations. (a1) A, fiber slicing, B, fiber matrix debonding; C, fiber cracking, j and D, fiber bending (especially in the case of aramid fiber or carbon fiber). (a2 More
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
... of temperature and moisture through the thickness of a laminate. Stresses caused due to mechanical loads, temperature, and moisture on the laminate are analyzed. The article concludes with information on interlaminar cracking, free-edge delamination, and transverse cracks of laminates. unidirectional...
Image
Published: 01 January 1987
. Fractograph shows one area of an epoxy-rich interlaminar region, between layers of fiber/resin tape. SEM (same conditions as in Fig. 1294 ), 2000× (In transverse (90°) specimens such as those shown in Fig. 1296 , 1297 , 1298 , and 1299 , the fibers run perpendicular to the loading direction and thus More
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003376
EISBN: 978-1-62708-195-5
... address: Stress-strain relationship for membrane and bending response Thermal and moisture effects Inelastic behavior Strength and failure Interlaminar stresses The article “Hygrothermal Behavior” illustrates the importance of considering thermal and moisture effects. The article...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003386
EISBN: 978-1-62708-195-5
... crushing of the laminate resin and fiber ( Fig. 5 ). The deflections, induced by the impact event, result in multiple delaminations resulting from interlaminar shear failures. The ply interfaces where these occur are a function of the stacking sequence of the laminate and tend to occur at interfaces...
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
... Abstract Knowledge of fatigue behavior at the laminate level is essential for understanding the fatigue life of a laminated composite structure. This article describes fatigue failure of composite laminates in terms of layer cracking, delamination, and fiber break and interface debonding...