Simulation and Experimental Study on Nonlinear Stress of Diaphragm Couplings
Diaphragm couplings are widely used in various shafting connections due to its good compen-sation capability in axial and angular misalignment,and their mechanical properties directly affect the safety and stability of shafting operation.Nonlinear stress characteristics simulation model of diaphragm couplings was established based on ANSYS finite element simulation software,considering contact nonlin-earity and large deformation effects.The magnitude and distribution of diaphragm stress under single loads in the torsion,axial,angular and radial directions of the diaphragm coupling were analyzed.Final-ly,static torsion and tensile tests were conducted to verify the accuracy of the simulation model.The re-sults show that the diaphragm stress is concentrated at the edge of the diaphragm bolt hole,the diaphragm waist,and near the edge of the contact surface between the diaphragm and the gasket.The outermost dia-phragm is most susceptible to damage under overload or alternating loads.
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