Research on Relations of Stress and Parameter of Premium Threaded Connections on Riser Subjected to Bending Load
Sun Jian-zhong
2012
Citations
0
Citations
Journal
Oil Field Equipment
Semantic Scholar
Key Takeaway Key Takeaway: The maximum stress in premium threaded connections under bending loads is on the first or last round of thread root, with parameters like wall thickness, depth of thread, thread pitch, number of teeth, and taper affecting the stress distribution.
Abstract
According to the situation of riser subjected to large bending load at the ocean circumstance,the 3D contact finite element analysis model for premium threaded connections which is the most likely to become failure is established with the finite element software of ANSYS.The characteristic of Stress distribution on threaded connections under bending loads is obtained.The result reveals that the maximum stress exists on the first or the last round of thread root in the tensile side of connections;the relations of thread root stress distribution in the tensile side and compressive side of the connections with circular angle is represented as approximately half sine respectively.On this basis,detailed analysis is given on the effect of the threaded parameter such as wall thickness,depth of thread,thread pitch,number of thread teeth and taper on the maximum equivalent stress.Thus it can be taken as references in design and optimization of premium threaded connections.