随着球罐的大型化、低温条件下使用以及高强度钢的广泛应用,许多问题均急需以新的强度理论一断裂力学来予以解决。这些问题是:1.球罐的脆断破坏;2.接管处的所谓高应力高应变区的失效准则及应变疲劳断裂;3.角变形及错口量等因素对球罐脆断的影响;4.从韧性及强度两个方面考 With the large-scale use of spherical tanks, the use under low-temperature conditions, and the wide application of high-strength steels, many problems are urgently needed to be solved with a new strength theory, a fracture mechanics. These problems are: 1. The brittle fracture of the spherical tank; 2. The failure criteria and strain fatigue fracture in the so-called high stress and high strain area at the take over; 3. The influence of the factors such as angular deformation and misalignment on the brittle fracture of the spherical tank; 4. Examine two aspects of toughness and strength