Joint And Muscle Forces During Clenching
The masticatory system is highly redundant. Therefore, complete knowledge about the activation patterns of the chewing muscles belonging to a specific resultant bite force can only be gained either by simultaneous force- and EMG-measurement or with the help of optimization strategies. In this study, such EMG and force measurements were carried out with 10 test persons and the results compared to those computed with several objective functions. The results show an increase of the joint forces with an increase of the horizontal component of the resultant bite force. The test persons seem to favor energy minimization as control mechanism.
This paper computed No.17 coupler yoke' stress intensity factors based on 1/4 displacement method of finite element method,calculated the crack propagation life of No.17 coupler yoke using Paris formula based on AAR spectrum,and given analysis and evaluation for the result.