Multidimensional strain field measurements using fiber optic grating sensors

2000 ◽  
Author(s):  
Eric Udd ◽  
Whitten L. Schulz ◽  
John M. Seim ◽  
Eric D. Haugse ◽  
Angela Trego ◽  
...  
Keyword(s):  
Strain Field ◽  
Fiber Optic ◽  
Field Measurements

Displacement and Strain Field Measurements from SPM Images

2004 ◽  
pp. 253-276 ◽  
Author(s):  
Jürgen Keller ◽  
Dietmar Vogel ◽  
Andreas Schubert ◽  
Bernd Michel
Keyword(s):  
Strain Field ◽  
Field Measurements

Strain Field Identification of an Aluminum Plate by using Distributed Fiber-Optic Sensors

2017 ◽  
Author(s):  
HIDEHARU OGINO ◽  
HIDEAKI MURAYAMA ◽  
FUMIYA FUJIMORI ◽  
KAZURO KAGEYAMA ◽  
DAICHI WADA ◽  
...  
Keyword(s):  
Strain Field ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Aluminum Plate ◽  
Field Identification

A fiber‐optic sensor for microwave field measurements

1995 ◽  
Vol 66 (8) ◽  
pp. 4031-4033 ◽  
Author(s):  
B. Schmauß ◽  
M. März ◽  
J. Ernst
Keyword(s):  
Microwave Field ◽  
Fiber Optic ◽  
Field Measurements ◽  
Fiber Optic Sensor ◽  
Optic Sensor

Local high edge observation for the bonding line monitoring of a complex composite beam

2020 ◽  
pp. 095440622093219
Author(s):  
Monica Ciminello ◽  
Bernardino Galasso ◽  
Gianvito Apuleo ◽  
Shay Shoam ◽  
Antonio Concilio
Keyword(s):  
Strain Field ◽  
Composite Beam ◽  
Composite Structures ◽  
Longitudinal Strain ◽  
Fiber Optic ◽  
Signal To Noise Ratio ◽  
Fiber Optic Sensors ◽  
Signal To Noise ◽  
Mechanical Loads ◽  
Spatial Domains

The most part of defects in composite structures carrying attached subelements is the disbond at the interface, as the skin/stringer sections. This is sometimes due to a nonoptimal manufacturing process or sometimes due to accidental object impacts during service. It has been verified that structural discontinuities within an elastic medium under mechanical loads can cause analogous discontinuities within the strain field. Starting from this analysis, the present work investigates the effect of artificially induced kissing bond areas just at the in the skin–stiffener interface of an aeronautical complex composite beam. This research uses longitudinal strain values, acquired at the locations where distributed fiber optic sensors are installed. The applied methodology uses different strain-based features providing local high edge observation both in time and spatial domains. Their autocorrelations are, in the end, computed to improve signal-to-noise ratio. The local high edge observation algorithm is proposed that proves its capability to monitor disbond being at the same time load and baseline independent.

Sign in / Sign up

Export Citation Format

Share Document