Estimation of Impact Fatigue Life of Spring Operating Mechanism's Opening Gusset Plate
A fatigue life calculation method suitable for strong impact loads is proposed to address the failure problem encountered by the opening gusset plate of the spring operating mechanism during operation.The kinematic analysis on the overall spring operating mechanism using RecurDyn is performed to obtain the closing speed,stroke,and spring force.Based on the kinematic model and using Lsdyna for impact dynamics simulation,the time stress curve at the stress concentration point of the opening gusset plate during the closing process is obtained.Based on its failure characteristics,the local stress-strain method combined with impact damage correction method is used for the life estimation,and the result obtained is 9 216 times.Compared with the actual testing frequency of 10 000 times,the error is 7.8％,which can meet the engineering requirements.
spring operating mechanismimpact fatigue lifelocal stress-strain methodimpact damage correction
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