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For aerospace vehicles, the development of new materials and structural configurations are key tools in the relentless drive to reduce weight and increase performance (in terms of, for example, speed and flight characteristics). The economic drivers are clear — it is widely recognised that it is worth approximately $10k to save one pound of weight in a spacecraft per launch and $500 per pound for an aircraft over its lifetime. The environmental drivers (ACARE 2050) are also clear — reduced aircraft weight leads to lower fuel burn and, in turn, to lower CO2 and NOx emissions. With such high cost-to-weight ratios, there is intense industrial interest in the development of new structural configurations/concepts and enhanced structural models that allow better use of existing or new materials. Analytical structural mechanics models of novel anisotropic structures, developed at the University's Advanced Composites Centre for Innovation and Science (ACCIS), are now used in the industrial design of aircraft and spacecraft. Based on this research, a new, unique anisotropic composite blade, designed to meet an Urgent Operational Requirement for the MoD, is now flying on AgustaWestland EH101 helicopters that are deployed in Theatre. In addition, the new modelling tools and techniques have been adopted by Airbus, AgustaWestland, Cassidian and NASA and incorporated into LUSAS's finite element analysis software. These tools have, for example, been used to inform Airbus's decision to use a largely aluminium wing design rather than a hybrid CFRP/aluminium wing for the A380.
Research into variable mechanical energy absorption, using Finite Element (FE) modelling and analysis, funded by Cellbond Ltd., led to a design specification for an Offset Deformable Barrier (ODB). Such barriers are used within the motor manufacturing industry to test vehicular safety. Based on the findings of our research, the barrier used in car crash tests has been redesigned. The design specification for the barrier has been adopted by the European New Car Assessment Programme (EuroNCAP). All newly designed cars are tested with this type of barrier before they enter production. The use of FE modelling and virtual crash testing allows barriers to be designed with particular properties and for the crash testing cycle to be shortened.
The vulnerability of both military and civilian infrastructure to the threat of terrorist activity has highlighted the need to improve its survivability, and this poses a significant design challenge to engineers. Research work at Imperial has led to the development of novel constitutive relationships for polymeric materials coupled to novel analysis procedures; software algorithms for effective simulations of blast and impact events; and enhanced experimental testing methods allowing a fundamental understanding of the structures. According to Dstl, this body of research has `unquestionably improved the security and effectiveness of the UK armed forces operating in hostile environments abroad as well as the safety of citizens using metropolitan infrastructure within the UK'. The techniques have been applied to vehicles and UK infrastructure, including for high profile events, such as the 2012 Olympics.
The key impact is in the definition of best practice for the design of joints, components and structures comprised of glass fibre reinforced polymers (GFRP, also known as fibreglass). The primary beneficiaries are (i) professional civil and structural engineering designers of GFRP structures; (ii) pultruders and composites fabricators due to continually expanding use of GFRPs in construction; and (iii) the general public through the provision of sustainable structures.
In particular, Lancaster's research on pultruded GFRP materials and structures has contributed to the EUROCOMP Design Code and Handbook (1996), the world's first limit state design code for GFRP structures. This code has influenced GFRP structural design globally ever since, both pre and post-2008. Additionally, post-2008, EUROCOMP has triggered and influenced development of new European and Japanese design codes, in turn impacting designers, fabricators and the public in those geographical regions. Lancaster's research has influenced the US Load and Resistance Factor (LRFD) Prestandard (2010) and ASCE's Manual No.102 on bolted and bonded joints (2011) two codes and guidelines that will accelerate the US's application of composites in construction.
Thus, the use of Lancaster's research in these codes and guidelines has supported the construction of fibreglass-based civil structures across the globe as well as the delivery of individuals with the analysis and design skills needed by the composites industry.
The Centre for Numerical Modelling and Process Analysis (CNMPA) was asked in 2004 to apply its expertise in computational reliability engineering, usually used in high technology manufacturing, to help save the Cutty Sark ship and in 2010 to help restore the Medway Queen. This case study details how our computational expertise had impact and in particular:
Research at University of Cambridge Department of Engineering (DoEng) has created a new fundamental understanding of the static, dynamic and blast performance of lattice sandwich structures (a repeating pattern of metal struts between two sheets of metal). Ship builders in the Netherlands and the USA have built over 19 ships worth approximately GB200M using this technology since 1/1/2008 with many more planned. These ships are:
Research led by two members of the University of Warwick's School of Engineering strongly influenced the planning, drafting and technical content of nearly all of Eurocode 4, one of ten European civil engineering standards. Eurocode 4 covers composite structures made of steel and concrete. Since 2010 this standard has been in force in all countries of the European Union (EU) and the European Free Trade Area (EFTA). The Eurocodes are the only set of design rules for publicly-funded structures on land that satisfy national building regulations throughout the EU and EFTA. Their impact on structural engineering is wide-ranging and growing, the principles and methodology contained within these Eurocode 4 will be the basis of engineering design teaching for Chartered Engineers throughout the EU.
Research, led by Oxford Brookes University's Dr Mike Godley and Dr Rob Beale, into the design and analysis of scaffold structures has enabled a better understanding of their behaviour, higher standards of safety and improved design. The Group produced technical guidance to the HSE and authored the design guide TG20:08 (2008); the basis for scaffold design in the UK. The Group contributed to new Euronorms for scaffolding and the UK design guide is compatible with these. Furthermore, the Group informed a pan- European design guide for storage racking systems (2000) that later transformed with little modification into EN 15512 (2009). This is now the basis for the design of all such storage racks across Europe.
The automotive and aerospace industries are keen to reduce their environmental impact and so have looked to move to lightweight materials. This creates issues in terms of joining, using and disposing of dissimilar materials. Oxford Brookes has therefore worked with national and multi-national companies in the adhesive, materials, automotive and aerospace industries to try to solve these problems. This has resulted in high quality research publications, innovative test equipment, improved numerical methods, novel designs, design guidelines, manufacturing procedures, British Standards, patents, commercial products and further funding. The impact of the work has global safety, environmental and economic benefits with multi-national aerospace and automotive companies implementing the results in current developments.
A significant body of research in ultrasonics at the University of Strathclyde led to the formation of Alba Ultrasound Limited in 2000. This successful UK engineering manufacturing company designs and manufactures high quality wideband ultrasonic array transducers for sonar applications to a worldwide client base, delivering benefits ranging from naval and maritime security through to safer ocean environments and informed exploitation of marine resources. Alba Ultrasound's unique array transducers constitute the sensor front-end in many leading sonar systems, and its innovative products are incorporated in a range of sonar devices used by the military and commercial companies. Through application of Strathclyde research, the company has experienced a significant period of growth during 2008-2013, with a three-fold increase in employees and turnover rising from £750k to £3.8M.