jump to content

ASTUTE 2020 Update September 2020

Here at ASTUTE 2020, we can support your business throughout this period of uncertainty. Our world-class academics and technical experts from across our strong Welsh Universities partnership are available to support you through research and innovation activities. If you wish to discuss opportunities for working with us e.g. to modify your production to develop solutions to support the fight against COVID-19, you can contact us via email.


Image: A Study into How to Assess Low Cycle Fatigue Behaviour of an Aluminium Conical Lighting Column

A Study into How to Assess Low Cycle Fatigue Behaviour of an Aluminium Conical Lighting Column

Business: Aluminium Lighting Company Ltd.

Expertise: Advanced Materials Technology Duration: 10 weeks

Result Areas: Lifing of materials in service   

Technology: Fatigue and Metallography Assessment

Location: Neath/Port Talbot


Fatigue failure of lighting columns, as a result of wind and traffic induced vibration, has received particular attention in recent years with the increased number of premature lighting failures on exposed sites. Designs involving welds are particularly at risk due to changes in material structure. Aluminium Lighting Company (ALC) are market leaders in the UK of fully extruded Aluminium lighting columns. Eliminating the use of welds within their columns could potentially give superior fatigue performance and extended life of the columns.


The present study will investigate how to characterise low cycle fatigue behaviour of the aluminium lighting columns via Finite Element Analysis (FEA) underpinned by low cycle fatigue testing and supported by the microstructural evaluation of the columns. In addition, ASTUTE will assist the company with the set-up and data analyses on actual field tests of columns under wind-loading to provide real-time fatigue data for FEA analysis.


The collaborative work looking at using FEA, fatigue test data and microstructural evaluation demonstrated the feasibility of this approach for robust structural loading behaviour evaluation for ALC’s columns. The FEA modelling has illustrated regions of the column where fatigue could be an issue. However, after metallurgical inspection it was found that the fully extruded columns exhibited a uniform microstructure, along with the FEA demonstrating stresses well below the fatigue limit threshold. As a result, the ALC columns show good resistance to fatigue cracking over the lifetime of the column.


FE analysis has highlighted that pressed stressed columns show superior fatigue resistance to welded columns. The stresses simulated in the column have demonstrated that the fatigue life of the column will exceed the desired lifetime of the column. This enables these columns to be placed in the most demanding of environments with safety the number one consideration. ALC will also have confidence in employing this approach in the future.

“ASTUTE a pleasure to work with, these results will be of great assistance in our future tendering”

- Barry Williams, Director

Download Case StudyDownload Case study DocumentBack