Lift capacity is the key performance of launch vehicle, and high chemical energy bi-propellants are commonly used for modern large liquid rockets. The residual unburned propellant has a strong effect on lift efficiency, especially orbital stages. In this paper, bias control mixture ratio studied, three models, including equal-probability depletion model (EPDM), equal-mass model(EMRM) optimum mo...

This study carries out spatial-resolved optical birefringence observations to quantify, for mode I (tensile opening) loading, the stress intensification at crack tip of brittle and ductile glassy polymers (polymethyl methacrylate—PMMA, polyethylene terephthalate—PET) as well one type elastomer: (ethylene propylene diene monomer—EPDM). We measure buildup in a precut specimen by correlating retar...