选用 D6AC 钢设计制作助推器壳体。设计中不采用传统的强度设计理论,而是以断裂安全设计理论为基础,兼顾强度的原则来合理地选取σ_b、σ_s、K_(?)、K_(?)/σ_s 和厚度。经动、静加载的低温试验、脉冲载荷试验、低温和常温液压破坏试验,以及高温快速拉伸、应力腐蚀性能、环境、贮存等一系列试验,结果表明,壳体性能全部达到了要求的指标,无一例低应力破坏事故。这说明了选材、设计和工艺是合理的、可靠的。 Use D6AC steel design booster shell. In the design, the traditional strength design theory is not adopted. Instead, σ_b, σ_s, K_ (?), K_ (?) / Σ_s and thickness are reasonably selected based on the theory of fracture safety design, taking into account the strength principle. After a series of experiments such as low temperature test, pulse load test, low temperature and normal temperature hydraulic fracture test, high temperature rapid tensile test, stress corrosion test, environment test and storage test, the results show that all the performance of the shell has reached the required index , No case of low-stress damage. This shows that the selection, design and process is reasonable and reliable.