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Titolo:
The static and fatigue strength of bolted joints in composites with hygrothermal cycling
Autore:
Chen, HS;
Indirizzi:
Chengshiu Inst Technol, Dept Mech Engn, Kaohsiung, Taiwan Chengshiu Inst Technol Kaohsiung Taiwan pt Mech Engn, Kaohsiung, Taiwan
Titolo Testata:
COMPOSITE STRUCTURES
fascicolo: 3-4, volume: 52, anno: 2001,
pagine: 295 - 306
SICI:
0263-8223(200105/06)52:3-4<295:TSAFSO>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Keywords:
hygrothermal cycling; bolted composite joint; double lap joint; hysteresis plot; hole elongation; bolt torque relaxation; moisture weight gain;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, HS Chengshiu Inst Technol, Dept Mech Engn, Kaohsiung, Taiwan Chengshiu Inst Technol Kaohsiung Taiwan ngn, Kaohsiung, Taiwan
Citazione:
H.S. Chen, "The static and fatigue strength of bolted joints in composites with hygrothermal cycling", COMP STRUCT, 52(3-4), 2001, pp. 295-306

Abstract

The effects of hygrothermal cycling upon the performance of a bolted composite joint was examined. Bolt torque relaxed as the number of environmentalcycles increased. Comparison with analytical results suggested that the bolt torque "zigzag" behavior probably results from the natural sensitivity of bolted composite joints to the existing ambient temperature and moisture. The washer effect and specimen surface finishes were investigated to studythe friction effect on joint bearing performance. Fatigue tests of specimens exposed to hygrothermal cycling exhibited greater hole elongation than specimens not exposed. High preload does improve static failure strength andthe fatigue life of specimens under room conditions. Tests run on IM6/3501-6 material specimens with hygrothermal cycling show reasonable declines infatigue life. The moisture weight gains of composites under hygrothermal cycling exposure were measured and compared to numerical results; good correlation was obtained. As a result, bolt failure occurred in some fatigue tests and is most frequently associated with large thickness-to-diameter ratio. The peak-to-peak stress was defined to study the effect of the R-ratio onbolts for the bolt failure problem. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 19/01/20 alle ore 00:38:19