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spring failures

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048129
EISBN: 978-1-62708-225-9
... Abstract Spring failures were investigated in this study. A seam that extended more than 0.05 mm below the wire surface was revealed and the fatigue-fracture front progressed downward from several origins. A crack that is triangular in outline was produced by each of the fronts...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001547
EISBN: 978-1-62708-225-9
... Abstract Life testing of cyclic loaded, miniature extension springs made of 17-7 PH stainless steel wire and AISI 302 Condition B stainless steel wire has shown end hook configuration to be a major source of weakness. To avoid cracking and subsequent fatigue failure, it was found that stress...
Image
Published: 01 December 1993
Fig. 1 Optical photograph of several of the spring failures, showing the typical failure locations . More
Image
Published: 30 August 2021
Fig. 19 Optical photograph of several of the spring failures; the typical failure locations are shown on the left More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001902
EISBN: 978-1-62708-217-4
... Abstract In a spring leg of a main landing gear, large brittle fracture zones indicated a predominately cleavage pattern with some ductile dimples, and a tiny fatigue segment disclosed fine striations. Factors influencing failure were surface decarburization, notch sensitivity of the modified...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048128
EISBN: 978-1-62708-225-9
.... The light areas were raised and rubbed smooth by the other half of the spring. This occurred because the engine ran after failure of the spring. Careful examination of the depressed areas revealed distinct outlines that represent sharp corners in the depressions. The origin at one of the sharp corners...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048156
EISBN: 978-1-62708-235-8
... Abstract A 6150 flat spring was found to be failed. The face of the spring was revealed to be under tensile stress. The failure was concluded to have begun at the dark spot on the edge where roughness resulted from shearing during the blanking operation. Blanking Roghness Tensile stress...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001813
EISBN: 978-1-62708-180-1
... Abstract This article discusses the common causes of failures of springs, with illustrations. Design deficiencies, material defects, processing errors or deficiencies, and unusual operating conditions are the common causes of spring failures. In most cases, these causes result in failure...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006836
EISBN: 978-1-62708-329-4
... Abstract Mechanical springs are used in mechanical components to exert force, provide flexibility, and absorb or store energy. This article provides an overview of the operating conditions of mechanical springs. Common failure mechanisms and processes involved in the examination of spring...
Image
Published: 01 June 2019
Fig. 1 Photograph of helical compressor spring failure that occurred three active turns from the bottom. The failure origin was on the inside diameter of the spring. More
Image
Published: 01 June 2019
Fig. 1 Spring failure originating at a sharp-edged pitted area. Arrows indicate the location of the sharp-edged areas. 28× More
Image
Published: 01 June 2019
Fig. 1 Valve-spring failure due to residual shrinkage pipe. (a) Macrograph showing fracture, as indicated by arrow. (b) Fracture surface; pipe is indicated by arrow. More
Image
Published: 30 August 2021
Fig. 1 Valve-spring failure due to residual shrinkage during solidification. (a) Macrograph showing fracture, as indicated by arrow. (b) Fracture surface; pipe is indicated by arrow. Source: Ref 4 More
Image
Published: 30 August 2021
Fig. 24 Photograph of helical compressor spring failure that occurred three active turns from the bottom. The failure origin was on the inside diameter of the spring More
Image
Published: 01 June 2019
Fig. 1 Spring leg of main landing gear has two failures at the upper (right) and lower ends. More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001119
EISBN: 978-1-62708-214-3
... was installed in a separate heavy truck engine in an application in which spring failure can cause total engine destruction. The springs were composed of chromium-silicon steel, with a hardness ranging from 50 to 54 HRC. Chemical composition and hardness were substantially within specification. Failure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0090994
EISBN: 978-1-62708-225-9
... black. Examination of the fracture locations revealed that the features were similar and both springs contained a precracked region. A representative fracture surface is shown in Fig. 1(a) . No additional cracks were observed. Fig. 1 Failure of tension springs. (a) Spring fracture surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0092131
EISBN: 978-1-62708-234-1
... load on the structure as a whole, and an arbitrary increase in applied load by the user on the assumption that the component has a high enough safety factor to accommodate the added load. Selected Reference Selected Reference • Maker J.H. , Failures of Springs , Failure Analysis...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0051292
EISBN: 978-1-62708-225-9
... marks and fatigue striations (beach marks), which are not always expected in the fracture surface of spring fatigue failures, as noted above. Clear evidence of pitting corrosion at the fatigue fracture origin can also be seen. However, the portions of spring showed no evidence of red rust and had...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001596
EISBN: 978-1-62708-225-9
... Abstract During testing of compressors under start/stop conditions, several helical suspension springs failed. The ensuing failure investigation showed that the springs failed due to fatigue. The analysis showed that during start/stop testing the springs would undergo both a lateral and axial...