Effect of contact geometry on compressive failure processes in sandwich structures
Reducing the unladen weight of road and rail vehicles as well as ships and aircraft is often a requirement. This is to increase their performance, achieve better fuel economy, reduce direct operating costs and make other improvements as new suitable lightweight materials become available. However, at the design stage, often it is also needed to assess the lightweight or other candidate materials as to their ability to absorb impact energy in the event of a crash or other major impact. Related to the use of lightweight materials in racing car bodies, the Federation International de L’Automobile (FIA) has introduced stringent methods for assessing lightweight and other structural materials particularly as to their ability to protect racing car drivers in the advent of a crash. However, this FIA assessment method requires large sheets of material and a very powerful impact facility. One aim of this study was to devise a scaled down method that was able to provide data relatable to those from the full-scale FIA evaluation. This is together with providing for varying the impact conditions to study the variability of material properties in panels. Also, this is to explore the properties of lightweight materials for other applications as to their high-energy absorption ability.
KeywordsSandwich Panel Impact Head Lightweight Material Honeycomb Core H620 Material
The authors thank Hexcel Composites for providing samples for the experiments.
- 1.Federation International du Sport Automobile, 2000/01—excerpts from formula one world championship technical regulations 2001, published: 02/11/2000Google Scholar
- 2.Savage G (1992) Met Mater 8:147Google Scholar
- 3.Gibson LJ, Ashby MF (1988) Cellular solids: structure and properties. Pergamon Press, Oxford, p 241Google Scholar
- 4.Abrate S (1998) Impact on composite structures. Cambridge University Press, Cambridge, p 1Google Scholar
- 9.Bland PW (2000) Impact response and performance of carbon–fibre reinforced polymers. PhD Thesis, Imperial College of Science, Technology and Medicine, University of LondonGoogle Scholar
- 10.Brown SA (1999) Low velocity impact resistance of reinforced polymeric materials. PhD Thesis, Imperial College of Science, Technology and Medicine, University of LondonGoogle Scholar
- 23.Maruszewska W (2005) Failure processes in composite sandwich structures for automotive and similar applications. PhD Thesis, Imperial College London, University of LondonGoogle Scholar
- 24.Young WC (1989) Roark’s formulas for stress and strain. McGraw-Hill: New York, p 398Google Scholar