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Fatigue testing of wood composites for aerogenerator blades. Pt. 11: Assessment of fatigue damage accumulation using a fatigue modulus approach

Conference:

Abstract

Stress-strain hysteresis loops have been captured during fatigue tests performed at R=10 (compression-compression) and R=0.1 (tension-tension) on Khaya epoxy wood composites. A fatigue modulus approach, proposed by Hwang and Han in 1989, has been applied to the data and a relationship established between the initial change in fatigue modulus and fatigue life. By following changes in fatigue modulus during the first 100 test cycles it is possible to predict the life of the sample allowing rapid evaluation of the fatigue performance of wood composites. Fatigue modulus values have also been calculated for hysteresis loops captured during complex load - time history tests. Similar trends in change in fatigue modulus suggest that this approach could be used in complex loading conditions to evaluate fatigue damage accumulation and predict fatigue life. (Author)
Authors:
Hacker, C L; Ansell, M P [1] 
  1. Bath Univ. (United Kingdom)
Publication Date:
Dec 31, 1995
Product Type:
Conference
Report Number:
CONF-940621-
Reference Number:
SCA: 170602; PA: GB-97:051252; EDB-97:090892; SN: 97001807415
Resource Relation:
Conference: 16. annual conference of the British Wind Energy Association, Stirling (United Kingdom), 15-17 Jun 1994; Other Information: PBD: 1995; Related Information: Is Part Of Wind energy conversion 1994. Proceedings; Elliot, G. [ed.] [National Engineering Lab., East Kilbride (United Kingdom)]; PB: 388 p.
Subject:
17 WIND ENERGY; FATIGUE; TURBINE BLADES; TESTING; COMPOSITE MATERIALS; WIND TURBINES; HYSTERESIS; WOOD; DAMAGE
OSTI ID:
490392
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Other: ISBN 0 85298 919 9; TRN: GB9751252
Submitting Site:
GB
Size:
pp. 205-210
Announcement Date:
Jan 22, 2004

Conference:

Citation Formats

Hacker, C L, and Ansell, M P. Fatigue testing of wood composites for aerogenerator blades. Pt. 11: Assessment of fatigue damage accumulation using a fatigue modulus approach. United Kingdom: N. p., 1995. Web.
Hacker, C L, & Ansell, M P. Fatigue testing of wood composites for aerogenerator blades. Pt. 11: Assessment of fatigue damage accumulation using a fatigue modulus approach. United Kingdom.
Hacker, C L, and Ansell, M P. 1995. "Fatigue testing of wood composites for aerogenerator blades. Pt. 11: Assessment of fatigue damage accumulation using a fatigue modulus approach." United Kingdom.
@misc{etde_490392,
title = {Fatigue testing of wood composites for aerogenerator blades. Pt. 11: Assessment of fatigue damage accumulation using a fatigue modulus approach}
author = {Hacker, C L, and Ansell, M P}
abstractNote = {Stress-strain hysteresis loops have been captured during fatigue tests performed at R=10 (compression-compression) and R=0.1 (tension-tension) on Khaya epoxy wood composites. A fatigue modulus approach, proposed by Hwang and Han in 1989, has been applied to the data and a relationship established between the initial change in fatigue modulus and fatigue life. By following changes in fatigue modulus during the first 100 test cycles it is possible to predict the life of the sample allowing rapid evaluation of the fatigue performance of wood composites. Fatigue modulus values have also been calculated for hysteresis loops captured during complex load - time history tests. Similar trends in change in fatigue modulus suggest that this approach could be used in complex loading conditions to evaluate fatigue damage accumulation and predict fatigue life. (Author)}
place = {United Kingdom}
year = {1995}
month = {Dec}
}