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Determination of the Shear Buckling Load of a Large Polymer Composite I-Section Using Strain and Displacement Sensors
Mechanical Engineering, Minnesota State University, Mankato, MN 56001, USA
Mechanical and Mechatronics Engineering, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon-si, Gangwon-do 200-701, Korea
* Author to whom correspondence should be addressed.
Received: 27 August 2012; in revised form: 5 November 2012 / Accepted: 5 November 2012 / Published: 22 November 2012
Abstract: This paper presents a method and procedure of sensing and determining critical shear buckling load and corresponding deformations of a comparably large composite I-section using strain rosettes and displacement sensors. The tested specimen was a pultruded composite beam made of vinyl ester resin, E-glass and carbon fibers. Various coupon tests were performed before the shear buckling test to obtain fundamental material properties of the I-section. In order to sensitively detect shear buckling of the tested I-section, twenty strain rosettes and eight displacement sensors were applied and attached on the web and flange surfaces. An asymmetric four-point bending loading scheme was utilized for the test. The loading scheme resulted a high shear and almost zero moment condition at the center of the web panel. The web shear buckling load was determined after analyzing the obtained test data from strain rosettes and displacement sensors. Finite element analysis was also performed to verify the experimental results and to support the discussed experimental approach.
Keywords: strain sensor; displacement sensor; shear buckling; polymer composite I-section; asymmetric loading
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MDPI and ACS Style
Park, J.Y.; Lee, J.W. Determination of the Shear Buckling Load of a Large Polymer Composite I-Section Using Strain and Displacement Sensors. Sensors 2012, 12, 16024-16036.
Park JY, Lee JW. Determination of the Shear Buckling Load of a Large Polymer Composite I-Section Using Strain and Displacement Sensors. Sensors. 2012; 12(12):16024-16036.
Park, Jin Y.; Lee, Jeong Wan. 2012. "Determination of the Shear Buckling Load of a Large Polymer Composite I-Section Using Strain and Displacement Sensors." Sensors 12, no. 12: 16024-16036.