Shape factors evaluate the efficiency of material usage in a structure. Previously, they have been developed for simple bending but, in practice, beams often have a more complicated bending response. Therefore, shape factors that account for asymmetric bending are introduced. The shape factors are applied to six example beam sections to demonstrate the effect of shape and load on structural efficiency. The shape factors are also enhanced for inclusion in a more general measure of structural efficiency, the performance index, comprising elements of both geometry and material. Next, a study is performed to show how the asymmetry of a beam section affects structural efficiency. The shape factors can quantitatively evaluate the structural efficiency of beam sections, demonstrating the effect of asymmetric bending on the structural response. Therefore, these shape factors can be used for concept selection and to provide insight into optimal structural design.
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January 2015
Research-Article
Structural Efficiency Measures for Sections Under Asymmetric Bending
Neil Buckney
,
Neil Buckney
ACCIS,
Department of Aerospace Engineering,
e-mail: neil.buckney@bristol.ac.uk
Department of Aerospace Engineering,
University of Bristol
,Bristol, BS8 1TR
, UK
e-mail: neil.buckney@bristol.ac.uk
Search for other works by this author on:
Alberto Pirrera
,
Alberto Pirrera
1
ACCIS,
Department of Aerospace Engineering,
e-mail: alberto.pirrera@bristol.ac.uk
Department of Aerospace Engineering,
University of Bristol
,Bristol, BS8 1TR
, UK
e-mail: alberto.pirrera@bristol.ac.uk
1Corresponding author.
Search for other works by this author on:
Paul M. Weaver
Paul M. Weaver
ACCIS,
Department of Aerospace Engineering,
e-mail: paul.weaver@bristol.ac.uk
Department of Aerospace Engineering,
University of Bristol
,Bristol, BS8 1TR
, UK
e-mail: paul.weaver@bristol.ac.uk
Search for other works by this author on:
Neil Buckney
ACCIS,
Department of Aerospace Engineering,
e-mail: neil.buckney@bristol.ac.uk
Department of Aerospace Engineering,
University of Bristol
,Bristol, BS8 1TR
, UK
e-mail: neil.buckney@bristol.ac.uk
Alberto Pirrera
ACCIS,
Department of Aerospace Engineering,
e-mail: alberto.pirrera@bristol.ac.uk
Department of Aerospace Engineering,
University of Bristol
,Bristol, BS8 1TR
, UK
e-mail: alberto.pirrera@bristol.ac.uk
Paul M. Weaver
ACCIS,
Department of Aerospace Engineering,
e-mail: paul.weaver@bristol.ac.uk
Department of Aerospace Engineering,
University of Bristol
,Bristol, BS8 1TR
, UK
e-mail: paul.weaver@bristol.ac.uk
Contributed by the Design Automation Committee of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received March 28, 2014; final manuscript received September 3, 2014; published online November 14, 2014. Assoc. Editor: Shinji Nishiwaki.
1Corresponding author.
J. Mech. Des. Jan 2015, 137(1): 011405 (15 pages)
Published Online: January 1, 2015
Article history
Received:
March 28, 2014
Revision Received:
September 3, 2014
Online:
November 14, 2014
Citation
Buckney, N., Pirrera, A., and Weaver, P. M. (January 1, 2015). "Structural Efficiency Measures for Sections Under Asymmetric Bending." ASME. J. Mech. Des. January 2015; 137(1): 011405. https://doi.org/10.1115/1.4028590
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