Structural strength of glued permanent joint in spherical shell of brittle material. Part 2

Abstract

1. Numerical investigation of spherical sectional shells with permanent glued joint fully characterizes their real state of stress as a whole and in the zones of stress concentration. 2. To achieve the most favorable stress state in the zone of the joint, it is recommended to use a uniform glued seam 0.06 to 0.04 mm thick which does not induce stress concentrations in the shell in the zone of the joint. 3. Application of the recommended solutions concerning design and technology will help considerably to reduce stress concentration in the zone of the permanent glued joint, and this, in turn, will increase the load-bearing capacity of the sectional structure in one-time short-term loading up to failure; it is also bound to increase the durability of such structures under cyclic loading. 4. Glued permanent joints in strong sectional spherical glass shells are a promising kind of joint. 5. Accurate calculation of the zone of the joint makes it possible to find the length of the lateral surface along the meridian which requires accurate machining to obtain a section of equal thickness in the zone of the joint.