Description In practice many hydraulic devices need to be designed to endure harsh environments. Pumps , valves , pipes carrying slurries often encounter large particles , greater that 10 mm in diameter resulting in erosion and impact damage. This project will investigate basic impact mechanisms that result from the impact of large particles on various materials with soft to hard characteristics and with different geomterical configurations. This is a practcial tsting project using an existing laboratory facility that may need to be devloped for large particles and will suit a studnet interested in testing and the analysis of results. Key Objectives Objectives (i) Develop a test technique for large particles (ii) Generate data by testing material impact damage for a range of particle sizes and material types. (iii) Analyse  data to estastablish impact results and differentiate with small particle erosion characteristics