Topology optimization has become an effective tool for least-weight and performance design, especially in aeronautics and aerospace engineering. The purpose of this paper is to survey recent advances of topology optimization techniques applied in aircraft and aerospace structures design. This paper firstly reviews several existing applications: (1) standard material layout design for airframe structures, (2) layout design of stiffener ribs for aircraft panels, (3) multi-component layout design for aerospace structural systems, (4) multi-fasteners design for assembled aircraft structures. Secondly, potential applications of topology optimization in dynamic responses design, shape preserving design, smart structures design, structural features design and additive manufacturing are introduced to provide a forward-looking perspective.

Topology Optimization in Aircraft and Aerospace Structures Design

On the prediction of bolted single-lap composite joints

An analytical model for the prediction of load distribution in highly torqued multi-bolt composite joints

This paper presents the development and validation of a global bolted joint model (GBJM), a highly efficient modelling strategy for bolted composite joints. Shell elements are used to model the composite laminates and the bolt is represented by a combination of beam elements coupled to rigid contact surfaces. The GBJM can capture effects such as bolt–hole clearance, bolt-torque, friction between laminates, secondary and tertiary bending in the laminates as well as the load distribution in multi-bolt joints. The GBJM is validated using both three-dimensional finite element models and experiments on both single- and multi-bolt joints. The GBJM was found to be robust, accurate and highly efficient, with time savings of up to 97% realised over full three-dimensional finite element models.

A global bolted joint model for finite element analysis of load distributions in multi-bolt composite joints

Stress analysis of multi-bolted joints for FRP pultruded composite structures

Finite element modeling and optimization of load transfer in multi-fastener joints using structural elements

A novel technique to study secondary bending due to the eccentric load path in single shear, composite-to-aluminium lap joints has been developed and used in a parametric study. The method is bas ...

Johan Ekh

Papers

Finite element modeling and optimization of load transfer in multi-fastener joints using structural elements

Secondary Bending in Multi Fastener, Composite-to-Aluminium Single Shear Lap Joints

Load Transfer in Multirow, Single Shear, Composite-to-Aluminium Lap Joints

Effect of secondary bending on strength prediction of composite, single shear lap joints

Simple and efficient prediction of bearing failure in single shear, composite lap joints