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Structural Engineering and Mechanics
  Volume 3, Number 1, January 1995, pages 91-103
DOI: http://dx.doi.org/10.12989/sem.1995.3.1.091
 


SHEAR CENTER FOR ELASTIC THIN-WALLED COMPOSITE BEAMS
POLLOCK GD, ZAK AR, HILTON HH, AHMAD MF

 
Abstract
    An analysis to determine shear centers for anisotropic elastic thin-walled composite beams, cantilevered and loaded transversely at the free end is presented. The shear center is formulated based on familiar strength of material procedures analogous to those for isotropic beams. These procedures call for a balancing of torsional moments on the cross sectional surface and lead to a condition of zero resultant torsional couple. As a consequence, due the presence of anisotropic coupling; certain non-classical effects are manifested and are illustrated in two example problems. The most distinguishing result is that twisting may occur for composite beams even if shear forces are applied at the shear center. The derived shear center locations do not depend on any specific anisotropic bending theories per se, but only on the values of bending and shear stresses which such theories produce.
 
Key Words
    ANISOTROPIC ELASTICITY, COMPOSITES, SHEAR CENTER, THIN-WALLED BEAMS
 
Address
POLLOCK GD, UNIV ILLINOIS,DEPT AERONAUT & ASTRONAUT ENGN,URBANA,IL 61801
UNIV ILLINOIS,NATL CTR SUPERCOMP APPLICAT,URBANA,IL 61801
 

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