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hole fit

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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
... (boPET, such as DuPont’s Mylar) scribed with hole pattern locations. The design, tooling, and fabrication databases were not necessarily coordinated, so high variability and poorly fitting parts were common. During the 1980s and 1990s, there was less use of boPET and greater reliance on hard tooling...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270065
EISBN: 978-1-62708-301-0
... a summary of the investigation, which included the use of scanning electron fractography, along with recommendations on acceptable hole patterns for rivets. fatigue fracture fractography Summary Background Pertinent Assembly Details Visual Examination of General Physical Features...
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
... fit factor β. The α factor accounts for the surface condition of the fastener hole ( Table A5.1 ). The β factor accounts for the effect of fastener type and how it is fastened ( Table A5.2 ). Fastener quality factor α Table A5.1 Fastener quality factor α Surface Condition α Standard...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630023
EISBN: 978-1-62708-270-9
... surface stress concentrations Interference Fit (Press or Shrink) In an interference fit of a shaft or tube into a hole in a collar, hub, or other member, there is a tensile circumferential (hoop) stress around the hole tending to burst or split the outer member, as shown in Fig. 5...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270107
EISBN: 978-1-62708-301-0
... separated in flight, causing severe vibrations. The rivets for fitting the rib to the blade were also missing. The skin of the blade was found torn off at a number of rivet holes. The separation of the rib is attributed to stress-corrosion cracking (SCC) in the regions adjacent to the rivets. Erosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610263
EISBN: 978-1-62708-303-4
... loaded holes, both cold working and interference-fit fasteners are used. While both cold working and the use of interference-fit fasteners are proven methods of improving fatigue resistance, both increase assembly costs and should only be specified when they are really needed. The most effective...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540215
EISBN: 978-1-62708-309-6
... emanating from a circular hole ( Ref 5.6 , 5.10 ). According to Ref 5.11 , the Bowie solution for uniaxial tension ( Fig. 5.4 ) can be fitted by the following equations: (Eq 5.9a) φ 1 = 0.707 − 0.18 χ + 6.55 χ 2    − 10.54 χ 3 + 6.85 χ 4...
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
... of the engines. Even after a three-engine landing, the fire warning continued. On strip examination of the engine, the hoses and rubber gaskets were found to be burnt. One of the bottom mounting bolts of the burner flange had melted and separated from the stem. The problem was traced to the burner being fitted...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460227
EISBN: 978-1-62708-285-3
... 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 tolerances at the fastener locations. A B-1 bomber left upper aft forward equipment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290279
EISBN: 978-1-62708-306-5
...-carrying capability has been significantly improved by increasing the head diameter of fasteners in order to distribute loads over a greater surface area. The bases of nuts and collars were similarly increased. Fasteners for composites should fit the holes with no clearance in order to avoid fretting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.9781627083164
EISBN: 978-1-62708-316-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140063
EISBN: 978-1-62708-264-8
... in iron by fitting into the holes (interstices) lying between the much larger iron atoms. As the temperature is raised, the carbon atoms begin to vibrate so much that they will often jump to the nearest empty hole. There will be net migration of carbon atoms in the direction with more empty holes. Thus...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870063
EISBN: 978-1-62708-299-0
... primarily in a marine environment. The structure is a tailplane attachment fitting made of aluminum alloy 2024-T4, which meets federal specification QQ-A-250/4. The arrow in Fig. 10(a) points to the corrosion. This corrosion problem was primarily caused by inadequate sealing of the bolt hole during...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610377
EISBN: 978-1-62708-303-4
... fitting tool details. During assembly, improper hole drilling can cause surface splintering of the plies, and even more serious are delaminations caused by unshimmed gaps during fastener installation. The clamping force that is applied when the fastener is torqued can cause matrix cracking...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870449
EISBN: 978-1-62708-314-0
... reaches the unnotched ultimate tensile strength. The values a 0 and d 0 , which are considered to be material properties, are determined from plots of strength reduction versus hole size to give the best fit to the experimental results. The two criteria are related through the relationship a 0 = 4...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900089
EISBN: 978-1-62708-350-8
... nitride furnace is similar in some respects to the cold-wall continuous dc system. The major physical difference between the two is that the hot-wall system is fitted with an insulated heating bell furnace around the process chamber. This means that workpiece heating can now be separated from plasma...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060195
EISBN: 978-1-62708-355-3
... of the counterbore. The thread in the wedge should have class 4H6H tolerance, except when testing studs having an interference fit thread, in which case the wedge will have to be threaded to provide a finger-free fit. The supporting fixture should have a hole clearance over the nominal size of the stud, and the top...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270005
EISBN: 978-1-62708-301-0
... mechanism was responsible for the loosening of the nut ( Ref 3 ). Figure 2.1 shows the two-stage turbine disk and the shaft. The locking nut fitted at the end of the shaft with its two locking pins intact is shown in Fig. 2.2 . The locking mechanism is shown in Fig. 2.3 . The locking nut with left...