The ability to use ceramic materials to increase the protection capability of the soldier´s helmet has been studied within the R&D project "Weapons and protection - technical threats and possibilities". Although there are a lot of knowledge about ceramic armour, some important pieces is still missing, such as how the fragmentation process works in detail and how it can be suppressed. The need for a more detailed knowledge is related to the fact that the helmet is a very weight constrained system. This is the reason why the response of the ceramic material and how it should be merged with the helmet structure has to be carefully analysed to be able to obtain desirable levels of protection. The report presents the results of an experimental study where an impact test method has been developed. The test method makes it possible to test how the fracture mechanical properties affect the protective properties of the ceramic material. Data from the tests will form the basis for further development of modelling resources so that FOI can support the helmet issue and other issues regarding threats and opportunities of ceramic based armour designs.