Design and Experimental Study on Flexible Articulation of Electric Stapler
10.16156/j.1004-7220.2021.06.08
- VernacularTitle:电动吻合器柔性转弯结构的设计与实验研究
- Author:
Zhen PAN
1
;
Liaoyuan AI
1
;
Haochen WANG
1
;
Chenxu LIU
1
;
Wenming GE
1
;
Chengli SONG
1
Author Information
1. Modern Minimally Invasive Medical Devices and Technology Engineering Research Center, Ministry of Education, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology
- Publication Type:Journal Article
- Keywords:
electric stapler;
flexible articulation;
kinematics;
statics;
variable stiffness;
finite element simulation
- From:
Journal of Medical Biomechanics
2021;36(6):E883-E889
- CountryChina
- Language:Chinese
-
Abstract:
Objective To design a notched flexible articulation applied to electric stapler and study its turning performance. Methods The notched flexible articulation was designed and modeled. The kinematics and statics models of the articulation were established for simulation calculations. The stress, deflection angle, top displacement and driving force of the articulation with 3 different turning structures were studied under equal and variable stiffness of symmetrical notches by using finite element simulation. An experimental platform for performance test of the turning structure was built to verify the simulation results and the model. Results The theoretical model of the turning structure in bending process was basically consistent with the experimental results. With the optimization of symmetrical notch stiffness, the maximum stress of the articulation with variable stiffness was reduced by 20.64% and 39.20%, respectively. The articulation with variable stiffness required the smallest tensile force during bending, which was 33.41% lower than that of the articulation with equal stiffness, and the tip displacement (30.8 mm) along the bending plane was the smallest. The maximum deflection angle for the articulation with 3 different turning structures all could reach 90°. Conclusions The kinematics and statics models of the articulation can be used for the calculation of its tensile force and position changes. The turning performance of the articulation with variable stiffness using symmetrical notch is better than that with equal stiffness. The notched flexible articulation meets the design requirements and the turning needs of electric stapler.
