Ultra-efficient Wound Composite Truss Structures

BKS Woods (University of Bristol), I Hill & MI Friswell (Swansea University)

Composites Part A: Applied Science and Manufacturing, Vol. 90, November 2016, pp. 111-124

Abstract

This paper presents the design, analysis, manufacturing, experimental testing, and multiobjective optimization of a new family of ultra-efficient composite truss structures. The continuously wound truss concept introduced here is a versatile, low cost and scalable method of manufacturing truss structures based on a simple winding process. A prototype truss configuration is shown and experimentally characterized under torsion and three point bending loads. A large deformation implementation of the direct stiffness method is shown to provide good prediction of the stiffness properties of the prototype truss. This model is extended to include strength prediction with multiple failure modes. The design space achievable with these truss structures is then explored through multiobjective optimization using the NSGA II genetic algorithm. These continuously wound truss structures have the potential to provide between one and two orders of magnitude increase in structural efficiency compared to existing carbon fiber composite tubes.

Paper Availability

This material has been published in the Composites Part A: Applied Science and Manufacturing, Vol. 90, November 2016, pp. 111-124, the only definitive repository of the content that has been certified and accepted after peer review. Copyright and all rights therein are retained by the Elsevier.


Link to paper using doi: 10.1016/j.compositesa.2016.06.022

Composites Part A: Applied Science and Manufacturing on ScienceDirect

ScienceDirect