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void analysis

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030147
EISBN: 978-1-62708-349-2
... in composite materials; they are generally categorized as voids that are due to volatiles (such as solvents, water) or voids that result from entrapped air. This chapter describes the analysis of various types of voids. It reviews techniques for analysis of voids at ply-drops, voids due to high fiber packing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030223
EISBN: 978-1-62708-349-2
...Abstract Abstract The honeycomb sandwich structure composite is a very efficient and complex structure widely used in the aircraft industry. Honeycomb-cored sandwich panels increase part stiffness at a lower weight than monolithic composite materials. This chapter describes the analysis...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060173
EISBN: 978-1-62708-343-0
... 8.80 N DEP-SRP Diesel engine piston, SRP 8.137 Im NDR-SRP Nonlinear Damage Rule, SRP 8.138 In SDA-SRP Statistical data analysis, SRP 8.139 Io SRL-SRP Statistically refined life, SRP 8.140 Ip ETM-SRP Exposure time modified, SRP 8.141 Iq SSC-SRP Steady-state...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030137
EISBN: 978-1-62708-349-2
... analysis to observe how the adjacent plies are affected. Figure 7.2 shows an example of how prepreg ply terminations can affect the adjacent fiber plies in a composite material. In the vicinity of the ply terminations, no voids are observed, and the adjacent plies are found to fill into the open space...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030089
EISBN: 978-1-62708-349-2
... terminations (i.e., ply drops), carbon fiber plies having different thicknesses, different prepreg material combinations (glass fabric prepreg and carbon fiber prepreg), and the number of plies. Bright-field illumination, 5× objective Void analysis of composite specimens can be performed using low...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030023
EISBN: 978-1-62708-349-2
... closest to the center of the head, with the backing pieces on the outside of the samples ( Fig. 2.8 ). Using this mounting method, specimens for void analysis, ply orientation, and ply-count analysis may be prepared quickly, with excellent results. Fig. 2.7 Automated grinding/polishing head showing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030159
EISBN: 978-1-62708-349-2
...Abstract Abstract The formation of microcracks in composite materials may arise from static-, dynamic-, impact-, or fatigue-loading situations and also by temperature changes or thermal cycles. This chapter discusses the processes involved in the various methods for the microcrack analysis...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860095
EISBN: 978-1-62708-338-6
... on. One technique for measuring composite void content is ASTM D 2734, but this technique is applicable only where the effect of ignition on the materials is known, as with glass fibers. Micrographic techniques or image analysis ( Ref 8.7 , 8.12 ) use highly enlarged micrographs to determine void...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430149
EISBN: 978-1-62708-253-2
..., fractography using SEM, EDS analysis, and microstructural examination. The results of chemical analysis confirmed that the material corresponds to the requirements of SA 213 Grade TP-347 HFG. Tensile and hardness values were normal. The SEM examination showed scattered creep voids and cracks along...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110067
EISBN: 978-1-62708-247-1
...) The phase inversion image clearly reveals the delaminations. Figure 46 SAM analysis showing four types of images acquired from a two-die stacked package and focused at the top die surface. (A) Peak amplitude image (B) Phase inversion image (C) Time of flight image (D) Transmission image...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870201
EISBN: 978-1-62708-314-0
... Interply and intraply voids and porosity Fig. 7.22 Effects of prepreg physical quality Fig. 7.23 Potential for void formation. Source: Ref 5 Fig. 7.14 Effect of fiber volume on bulk compressive stress. Source: Ref 3 Fig. 7.24 Typical carbon/epoxy cure cycle...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140047
EISBN: 978-1-62708-335-5
... through radiographic analysis. The presence of internal voids diminishes property capability ( Fig. 5.8 ). The void fraction reduces the effective cross-sectional area under stress and void topography concentrates applied stresses to substantially lower tensile and yield strengths and elongation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110062
EISBN: 978-1-62708-247-1
... of packaging failure analysis with 2D projection type x-ray imaging system. Images provided by Phoenix |x-ray, a division of GE Sensing and Inspection Technology. Figure 6 Live overlay of CAD design in the X-ray image. Missing heel fillet and complete missing solder can be identified at two gullwing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780404
EISBN: 978-1-62708-281-5
... polymer tested in uniaxial tension Fig. 15 Crack formation from a craze Fig. 9 Failed polycarbonate lenses exhibited primary and secondary cracking associated with solvent swelling and cracking Fig. 16 Shrinkage void on field fracture surface of polycarbonate. 12× Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610055
EISBN: 978-1-62708-303-4
...) and was not tempered. Tested as a Charpy V-notch specimen at 0 °C (30 °F). Source: Ref 4 Fig. 12 Schematic of (a) ductile tearing along plane normal to normal stress and (b) zig-zag path of void sheet fracture along shear planes. Source: Ref 3 Fig. 13 Examples of ductile fracture on shear...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030001
EISBN: 978-1-62708-349-2
... decades to provide insight into the micro- and macrostructure of fiber-reinforced composites. The most widespread use of optical microscopy for composites is determining void content, ply counts, and fiber orientations. While this makes up the majority of analysis, the investigation of failure mechanisms...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.9781627083492
EISBN: 978-1-62708-349-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130151
EISBN: 978-1-62708-284-6
... for the early failure of a component during heat treatment or in service. The failure analyst uses these seven items as a guide in a failure analysis. This chapter deals specifically with improper casting projects and those features that originated in the casting process itself, including porosity (generated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140055
EISBN: 978-1-62708-335-5
... performance. The principles of HIP are: At elevated temperatures and under increased pressure, limited but significant dissolution of hydrogen in the aluminum alloy matrix occurs, permitting the collapse and healing of void surfaces formed by hydrogen precipitation during solidification...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060043
EISBN: 978-1-62708-343-0
... damage should not be considered twice by including creep strains in the cycle damage component. However, the paper for the 1971 ASME meeting subsequently became “Creep-Fatigue Analysis by Strain-Range Partitioning.” The test data used for the paper were the very same that had been developed for the paper...