Characterisation of Materials used in Flex Bearings of Large Solid Rocket Motors

  • CH.V. Ram Mohan Advanced Systems Laboratory, Hyderabad
  • J. Ramanathan Advanced Systems Laboratory, Hyderabad
  • Satish Kumar Terminal Ballistics Research Laboratory, Chandigarh
  • AVSSKS Gupta Jawaharlal Nehru Technological University, Hyderabad


Solid rocket motors are propulsion devices for both satellite launchers and missiles, which require guidance and steering to fly along a programmed trajectory and to compensate for flight disturbances. A typical solid rocket motor consists of motor case, solid propellant grain, motor insulation, igniter and nozzle. In most solid rocket motors, thrust vector control (TVC) is required. One of the most efficient methods of TVC is by flex nozzle system. The flex nozzle consists of a flexible bearing made of an elastomeric material alternating with reinforcement rings of metallic or composite material. The material characterisation of AFNOR 15CDV6 steel and the natural rubber-based elastomer developed for use in flex nozzle are discussed. This includes testing, modelling of the material, selection of a material model suitable for analysis, and the validation of material model.

Defence Science Journal, 2011, 61(3), pp.264-269, DOI:

How to Cite
Mohan, C., Ramanathan, J., Kumar, S., & Gupta, A. (2011). Characterisation of Materials used in Flex Bearings of Large Solid Rocket Motors. Defence Science Journal, 61(3), 264-269.
Research Papers