Research on Straightening Model of Complex Section Guide Rail Based on Elastic-Plastic Theory
To solve the straightening problem of lateral and longitudinal bending deformations in a rail with complex cross-sections,a theoretical model for straightening deflection is established,along with explicit e-quations for straightening stroke.First of all analyze the guide based on linear reinforced elastic-plastic ma-terial elastic-plastic stage stress and strain geometric relationship,based on the expression of the bending moment and stress,combined with the bending moment of the axial change rule,to determine the range of plastic stage of the straightening pressure,to get the straightening pressure with the relationship between the total straightening deflection and the initial deflection and the final establishment of the straightening of the-oretical calculation model.In order to verify the correctness of the theoretical model,the linear reinforced e-lastic-plastic mechanics model of the guide rail is established in ABAQUS,and the constraints of one end fixed and one end sliding are adopted,and the loading head is loaded,so as to simulate the relationship be-tween the straightening pressure and the deflection.The results indicate that the theoretical model and the fi-nite element simulation of the deflection and straightening pressure curve law is completely consistent,which verifies the feasibility and correctness of the theoretical model.
linear guidestraightening pressuretotal straight deflectionrebound deflection
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