Characteristics of Mechanically Fastened Joints of CIP/HIP-1 Beryllium

摘要

Mechanically fastened joints of CIP/HIP-1 beryllium were investigated. A standard ASTM pin-jointed bearing strength test was used to determine the effect of hole size and edge distance-to-thickness ratios on the bearing strength of beryllium plates. Joints for structures were studied by testing two types of arrangements of pin holes with different transverse pitches. From the standard ASTM pin-jointed bearing strength tests, it was determined that the design criterion for single-pinned joints of CIP/HIP-1 beryllium should be based on maximum stress instead of net cross-section stress. Furthermore, it was found that if the edge distance-to-pin diameter ratio was kept constant, the specimens would have the same bearing yield stress, bearing strength, and maximum bearing strain. In the investigation of structural bolted joints, the double-bolted joints show that the transverse pitch and hole pattern have no effect on the load-carrying capability. (Author)