In this paper, the Bree diagram is extended to consider progressive buckling failure and a direct approach for structural design considering ratcheting deformation developed. Firstly, mechanism of structures subjected combination constant cyclic loadings sufficiently discussed. Then, two-stage developed based on Linear Matching Method nonlinear analysis, which can generate curves in diagram. To...

This article aims to acquaint readers with a designed test bench for direct acting differential pressure control valves. These valves are used in district heating systems. The conformity of the construction international standard IEC 60534-2-3:2015 is evaluate and results an experimental study valve AVPB DN20 Kvs 6.3 PN16 present.