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fastener holes

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870373
EISBN: 978-1-62708-314-0
...° tensile modulus, msi 1.3 1.3 … 0° flexural strength, ksi 269 243 85 0° flexural modulus, msi 17.8 16.3 3.8 PEI, polyetherimide; PP, polypropylene; PPS, polyphenylene sulfide. Source: Ref 12 Strength degradation due to fastener hole defects Table 14.15 Strength degradation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540391
EISBN: 978-1-62708-309-6
.... This appendix discusses stress severity factors associated with fastener holes in attachment joints. crack development fastener holes fatigue analysis stress severity factors THE STRESS SEVERITY FACTOR, K SSF , is an empirical factor that accounts for the geometrical stress concentration effect...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290207
EISBN: 978-1-62708-306-5
... fastener system. The chapter then describes important structural fasteners, namely bolts, screws, pins, collar fasteners, rivets, blind fasteners, machine pins, and spring clip fasteners. The following sections describe the process involved in presses, shrink fits, hole generation, and fastener...
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
... Typical wing fuel tank sealing Fig. 11.4 Typical freehand drill motor. Source: Cooper Power Tools Fig. 11.5 Limited-access fastener installation. Source: The Boeing Company Fig. 11.6 Composite hole splintering Fig. 11.7 Drilling forces on composite laminate. Source...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870449
EISBN: 978-1-62708-314-0
... for use with carbon composites is titanium. Best coefficient of thermal expansion match and minimum corrosion problem. 15. Do not use interference fit-type fasteners that require driving the fasteners into the hole. May cause hold damage, which will degrade bearing strength. 16. Use a CRES...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870517
EISBN: 978-1-62708-314-0
... Compression tests on repaired and unrepaired delaminated fastener holes Fig. 19.3 Multiple levels of delamination around the fastener hole. Source: Ref 1 Fig. 19.4 Photomicrograph of delaminations and matrix cracks. Source: Ref 1 Fig. 19.5 Injection scheme for delaminated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460227
EISBN: 978-1-62708-285-3
.... The transmission has been assembled and is in the engine test stand. Courtesy of the Applied Research Laboratory, The Pennsylvania State University A common problem on military aircraft is wear due to chafing around fastener holes in skin panels. This chafing results in skin panels that exceed fit...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610377
EISBN: 978-1-62708-303-4
... (more than 50 mm, or 2 in., in diameter), the problem is mostly with thin laminates. Effects of manufacturing defects such as porosity and flawed fastener holes that are slightly in excess of the maximum allowable are usually less severe. They are generally accounted for by the use of design-allowable...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870063
EISBN: 978-1-62708-299-0
.... An illustration of this type of failure, originating at a fastener hole, is shown in Fig. 9 . Fig. 9 Schematic of exfoliation in an aluminum aircraft panel Another example of exfoliation corrosion is illustrated in Fig. 10 . The failed airframe structure shown was removed from an aircraft...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610263
EISBN: 978-1-62708-303-4
... Studs Many fasteners transfer load through shear by bearing on the sides of holes in the joined substrates. Although proportioned in design by assuming all fasteners carry an equal share of the transferred load, the fasteners in the outermost rows carry more load than those in the inner rows...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240243
EISBN: 978-1-62708-251-8
... the surface and bulk. Many large structures are assembled with mechanical fasteners. In the aerospace industry, fatigue life improvement of aluminum structures is often accomplished with cold working of fastener holes and/or installing interference fit fasteners. Since fatigue cracks often initiate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270126
EISBN: 978-1-62708-301-0
... melted at the elbow bend and showed large blow holes formed during subsequent solidification of the molten metal. One of the fastening holes at the flange had burned and melted and was found elongated. Fig. CH26.1 Damaged fuel nozzle Metallography and Hardness Discussion Conclusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230441
EISBN: 978-1-62708-298-3
...., Plenum Press, NY , p 231 – 247 10.1007/978-1-4757-0668-0_12 Adhesive bonding of beryllium permits utilization of a combination of desirable physical and mechanical properties of beryllium while minimizing the inherent problems of high notch sensitivity (especially at fastener holes when using...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
..., controlling service temperature, and keeping trimmed edges and fastener holes sealed all help to mitigate the adverse effects of environmental degradation. Chopped fiber is made by mechanically chopping rovings, yarns, or tows into short lengths, typically 1 4 to 2 in. (6 to 50 mm) long...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290279
EISBN: 978-1-62708-306-5
... are that no surface treatment is required and disassembly of the components for inspection and repair is straightforward. The main limitations are increased weight, the presence of large stress concentrations around the fastener holes, and potential in-service corrosion problems. The typical applications...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480265
EISBN: 978-1-62708-318-8
... sequence is similar to that used for riveted joints. Parts are positioned to align the holes, clamped to maintain alignment if necessary, and the fastener is inserted in the hole. If the fastener does not enter the hole, alignment and hole and fastener size should be checked and corrected, if necessary...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
... yielding or cracking of the structural component. If the mechanical defect is located at a high-stress location, the reduction in life can be significant and possibly catastrophic. For example, damage at a fastener hole in a wing skin spar mechanically induced during the drilling of the hole is shown...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870045
EISBN: 978-1-62708-299-0
..., this type of material deterioration can spread extensively before it is detected by aircraft maintenance personnel. In typical cases, filiform corrosion develops around fastener holes on airframe sheet structures. Paint blistering around the rivet holes is a characteristic feature of this type of corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540215
EISBN: 978-1-62708-309-6
... Testing of High Strength Metallic Materials, STP 410 , ASTM , 1966 5.10. Bowie O.L. , Analysis of an Infinite Plate Containing Radial Cracks Originating at the Boundaries of an Internal Circular Hole , J. Math. Phys. , Vol 35 , 1956 , p 60 10.1002/sapm195635160 5.11. Newman...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500289
EISBN: 978-1-62708-317-1
.... Therefore, neither distortion nor embrittlement is present. Pre- and posttreatment of workpieces is rarely necessary. The disadvantages of mechanical joining include: Fasteners do not seal the joint against liquids or gases. Prone to failure at the hole where the fastener goes through...