1-20 of 146 Search Results for

Torque

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046146
EISBN: 978-1-62708-217-4
... Abstract The torque-arm assembly (aluminum alloy 7075-T73) for an aircraft nose landing gear failed after 22,779 simulated flights. The part, made from an aluminum alloy 7075-T73 forging, had an expected life of 100,000 simulated flights. Initial study of the fracture surfaces indicated...
Image
Published: 01 June 2019
Fig. 9 Schematic diagram showing the addition of the torque (dotted line) due to lateral deflection on the spring during start/stop conditions. The solid line represents the torque due to the compression of the spring. The magnitude of the shear stress associated with the stress conditions More
Image
Published: 01 June 2019
Fig. 1 Aluminum alloy 7075-T73 landing-gear torque-arm assembly that was redesigned to eliminate fatigue fracture at a lubrication hole. (a) Configuration and dimensions (given in inches). (b) Fracture surface showing fatigue beach marks. Approximately 2× More
Image
Published: 01 December 2019
Fig. 4 Removal torque (Nm) of the cylinder head bolts during the engine disassembly More
Image
Published: 01 January 2002
Fig. 59 Crack (arrows) in casting that developed during torque testing. ∼1.1× More
Image
Published: 30 August 2021
Fig. 38 Crack (arrows) in casting that developed during torque testing. Original magnification: ~1.1× More
Image
Published: 01 December 1992
Fig. 2 Crack (arrows) in the casting that developed during torque testing. 1.1×. More
Image
Published: 01 December 1992
Fig. 7 Fracture surface at torque rod mounting hole on fatigue tested sample 9. More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001029
EISBN: 978-1-62708-214-3
... Abstract Two investment-cast A356 aluminum alloy actuators used for handles on passenger doors of commercial aircraft fractured during torquing at less than the design load. Visual examination showed that cracking had occurred through a machined side hole. Fractography revealed that the cracks...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001649
EISBN: 978-1-62708-234-1
... Abstract Two titanium alloy wing attachment bolts from a commercial jetliner failed during the course of a routine service operation. Failure of the bolts occurred during the re-torque process as the wing was being reattached. Metallurgical failure analysis indicated that the fracture mechanism...
Image
Published: 01 June 2019
Fig. 6 Fractograph of detrimentally over-torqued bolt. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001903
EISBN: 978-1-62708-217-4
... features typical of low stress intensity fatigue of aluminum alloys. The fatigue resulted from abnormal fretting owing to inadequate torquing of the main retention bolts. Aircraft maintenance engineers and owners were advised to adhere to specifications when torquing this joint. Aircraft components...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048626
EISBN: 978-1-62708-225-9
... Abstract Cadmium-plated high-strength steel bolts were used to facilitate quick disassembly of a vehicle. One bolt was found fractured across the root of a thread after being torqued in place for one week. The bolts were made of 8735 steel heat treated to a tensile strength of 1241 to 1379 MPa...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0089254
EISBN: 978-1-62708-225-9
... of the wedge-shaped middle rings fractured prior to having been fully torqued, preventing the sprocket from being locked to the shaft. “Woody” fracture features, as a result of decohesion between a high volume fractions of manganese sulfide stringers and the matrix, was revealed during examination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001424
EISBN: 978-1-62708-233-4
... case the machine was a 200 kW alternator, direct-driven by a diesel engine running at 750 rpm. Both the foregoing failures reveal the same basic weakness, i.e., insufficient rigidity when subjected to variations or reversals of torque. In the first case, the bars welded to the arms were inadequately...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0090929
EISBN: 978-1-62708-236-5
... Abstract Size M5 x 0.8 mm, class 8.8 metric screws were failing during application, reportedly at the normal installation torque. Investigation (visual inspection, metallographic analysis, and unetched 8.9x fractographs) supported the conclusion that the fasteners failed via ductile overload...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001764
EISBN: 978-1-62708-241-9
... <0.005 Tungsten (W) <0.01 <0.01 <0.01 Vanadium (V) <0.005 <0.005 <0.005 Fig. 11 Von Mises stress contours present in the Design 1 drive shafts subjected to 1356 N-m (1000 ft-lbf) torque. Maximum stress is 93.7 MPa (13.59 ksi) at the location indicated. Fig...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001668
EISBN: 978-1-62708-232-7
... the lower vessel and maintaining a seal. After the failure occurred, it was discovered that the bolts were being incorrectly torqued to 69 Nm rather than to 40 Nm. The explosion occurred three hours after furnace startup. The same bolts had been used previously in one other similar test that ran one week...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001306
EISBN: 978-1-62708-215-0
... origins around the circumference. There was no indication that any microstructural characteristics of the material contributed to the failure. Inclusions that were present were small and relatively few in number. Failure to check the torque of the inner wheel nuts as per the manufacturer's recommendation...
Image
Published: 01 December 1992
Fig. 17 Finite-element models. (a)“As built” flange-to-valve body juncture with bolt load from torqued studs (in increments of approximately 91 70 kPa, or 133- psi). (b)“Corroded at fracture” flange-to-valve body juncture with bolt load from torqued studs (in increments of approximately 10,600 More