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Overloading

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Published: 01 August 2012
Fig. 10.17 Overload protection systems: (a) mechanical (shear plate) overload protection; (b) hydraulic overload protection. Adapted from Ref 10.3 . More
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Published: 01 January 2015
Fig. 21.20 Overload case fracture surfaces in carburized 8620 steel (a) quenched directly after carburizing at 927 °C (1700 °F) and (b) reheated to 788 °C (1450 °F). Both specimens tempered at 145 °C (300 °F). Scanning electron micrographs. Source: Ref 21.37 More
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Published: 01 September 2008
Fig. 33 Scanning electron micrographs of overload case fracture surfaces in carburized SAE 8620 steel. (a) Quenched directly after carburizing at 927 °C (1700 °F). (b) Reheated to 788 °C (1450 °F). Both specimens were tempered at 145 °C (300 °F). More
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Published: 01 September 2008
Fig. 22 SEM examination of the failed roll pin and laboratory-produced overload fractures. (a) Location A of the service failure (20 μm). (b) Location A of the service failure showing intergranular fracture with some dimples (5 μm). (c) Laboratory-produced overload failure showing intergranular More
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Published: 01 September 2008
Fig. 45 Dimpled rupture indicating overload failure in a laboratory-produced failure. Original magnification: 5000× More
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Published: 30 November 2013
Fig. 5 Single-overload torsional fracture on the transverse shear plane of a shaft of medium-carbon steel of moderate hardness. Note that the originally straight splines have been twisted in a counterclockwise direction. Final rupture was slightly off center due to a relatively slight bending More
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Published: 30 November 2013
Fig. 6 Single-overload torsional fracture of a shaft of ductile steel similar to that in Fig. 5 . The hole in the center is the lathe center from the original machining on the part More
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Published: 01 September 2008
Fig. 8 Fracture of an ISO 12.9 bolt by ductile torsional overload. (a) Overall view of fracture. (b) Smooth and fibrous fracture as seen through the SEM. (c) Microvoid coalescence (dimples) More
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Published: 01 August 2005
Fig. 2.51 Overload fracture in notched AISI 4340 steel specimens (35 HRC) from tension testing at three different temperatures. (a) The surface of the specimen tested at −40 °C (−40 °F) shows only fibrous marks. (b) The specimen tested at 80 °C (−110 °F) has a fibrous zone that surrounds a radial More
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Published: 01 August 2005
Fig. 5.57 Schematic post-overload crack growth behavior More
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Published: 01 August 2005
Fig. 5.60 Cyclic and overload (OL) plastic zone boundaries and their relation to post-overload crack growth. (a) 50% OL, R = 0.4. (b) 100% OL, R = 0.4. (c) 50% OL, R = 0.05. (d) 100% OL, R = 0.05. Δ K = 10.5 MPa m for (a) to (d). (e) Overload plastic zone development. (f More
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Published: 01 January 1998
Fig. 13-17 Cleavage fracture on overload fracture surface of H13 steel CVN specimen tempered at 500 °C (930 °F) for 3 h. TEM carbon replica. Source: Ref 9 More
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Published: 01 September 2005
Fig. 52 Overload failure of a bronze worm gear (example 4). (a) An opened crack is shown with a repair weld, a remaining casting flaw, and cracking in the base metal. (b) Electron image of decohesive rupture in the fine-grain weld metal. Scanning electron micrograph. Original magnification at 119 More
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Published: 01 March 2006
Fig. 9.18 Crack growth retardation effects of periodic overloads ( Ref 9.27 ). (a) Loading. (b) Crack growth More
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Published: 01 March 2006
Fig. 9.23 Crack growth rate retardation pattern after an overload. Source: Ref 9.37 More
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Published: 01 March 2006
Fig. 11.71 Illustration of crack growth arrest by residual stress due to overload. A, slotted notch; B, crack developed at 65 ksi; C, tensile portion of fracture; D, crack developed at 20 ksi. Source: Ref 11.78 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270120
EISBN: 978-1-62708-301-0
... surface indicated that cracking initiated at the outer periphery of the strut and propagated inward until overload fracture occurred. SEM imaging revealed fatigue striations along the outer periphery and dimples elsewhere, indicative of tensile overload. Based on these observations, investigators...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270124
EISBN: 978-1-62708-301-0
... that a considerable amount of rubbing occurred after the shaft broke. SEM fractography revealed deformation marks and elongated dimples, typical of shear overloads, along with other details. Based on their analysis, investigators concluded that the cardan shaft failed under torsional overload. They also cited a need...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270076
EISBN: 978-1-62708-301-0
...Abstract Abstract An adaptor and a bolt were overloaded during a flight causing them to fracture. This chapter recounts the circumstances that led to the failure and the investigation that followed. It includes images of the fracture surfaces which show that both components failed quickly due...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270078
EISBN: 978-1-62708-301-0
...Abstract Abstract This chapter explains how investigators determined that a stabilizer link rod fractured due to overload, possibly by a combination of tension and bending forces that occurred during an accident. It includes images comparing the fractured rod with its undamaged counterpart...