NDLI: Application of Flat-Clad Optical Fiber Bragg Grating Sensor in Characterization of Asymmetric Fatigue Deformation of Extruded Magnesium Alloy

Content Provider	IEEE Xplore Digital Library
Author	Xijia Gu Cheng Li Aihan Feng Daolun Chen
Copyright Year	2001
Abstract	We report the application of a novel flat-cladding optical fiber Bragg grating sensor array in the characterization of low cycle fatigue deformation behavior of an extruded AZ31 magnesium alloy. The results obtained from optical fiber sensors showed strong asymmetry of stress-strain hysteresis loops, especially at high strain amplitudes, due to the occurrence of twinning in compression and detwinning in tension. At a given total strain amplitude, the degree of asymmetry of the hysteresis loops decreased with increasing number of cycles. The alloy also exhibited strong cyclic hardening at higher total strain amplitudes. All of these observations were in good agreement with those measured from an extensometer, and with those reported in the literature. In particular, the plastic strain amplitudes evaluated from optical fiber sensors demonstrated a nearly perfect agreement with those obtained from the extensometer, further corroborating the suitable use of the optical fiber sensors as an important tool in the evaluation of cyclic defromation behavior of materials.
Sponsorship	IEEE Sensors Council
Starting Page	3042
Ending Page	3046
Page Count	5
File Size	590550
File Format	PDF
ISSN	1530437X
Volume Number	11
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Strain Magnesium Fatigue Optical fiber sensors Plastics Strain measurement twinning and detwinning Cyclic deformation flat-clad optical fiber Bragg grating sensor hysteresis loop low cycle fatigue magnesium alloy
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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