The microstructures and intrinsic defects engendered during the compression process of manufacture of a PBX substitute material D-90031,as well its dynamic behavior and failure mechanisms were studied.

Through comparing mechanical behaviors of PBX material with that of rock material, and by u-sing the method applying to study rock fracture mechanics, the experiment of white light speckle of PBXmaterial under three-point bending loads is designed.

It analyzed some key methods of substation bus wire joint through adopting hydraulic compression-fitting joint process and put forward some opinions of using material substitute and mechanical equipment and high altitude working of this kind of process.

This paper proposes the method to measure rocket projectile charge substitute material for measuring rocket projectile charge temperature,which overcomes the difficulty resulting from measuring rocket projectile charge temperature and improving the accuracy of measurement,presents how to measure charge temperature characteristics curve and how to select the substitute material through experiment.