DEFORMATION AND FAILURE ANALYSIS OF REINFORCED GRAIN

摘要

After considering the limitations imposed by the char¬acteristic response of filled elastomers on the performance of case-bonded solid propellant grains, particularly the ef¬fect of loss of filler-binder interaction with increasing strain, the significant features of metal-wire of mesh-rein¬forced grains are discussed. The difference between the de¬sign criteria for such grains and for other types of rein-forced structures is emphasized and the inapplicability of classical methods of visco-elastic analysis is discussed.nMethods of analysis of elastic orthotropic, inhomogeneous, case bonded grains are summarized and their limitations shown with respect to optimal utilization of the reinforce¬ment. Such utilization requires the use of reinforcement of variable ductility throughout the wall-thickness of the grain and the consideration of its elastic-plastic response in grain analysis.