Abstract The high-purity ethylene dichloride (EDC) head tower is an important pressure vessel in the vinyl chloride production process. During manufacturing process, bending test of 2 product specimens broke. In this paper, failure analysis fracture welding plate was carried out, and a systematic analysis, including chemical composition, mechanical properties, microstructure, out. causes welded...

The complete stress field, including the microstress, the moment-stress, and the line forces are derived for the pure bending of a rigid-plastic beam of rectangular cross-section in the model of strain-gradient plasticity. The workless spherical parts of the microstress and the moment-stress tensors are incorporated in the analysis. Their determination is shown to be of importance for the fulfi...