Modelling large deflection of a compliant mechanism: A Comparative Study Using Discrete Euler Beam Constraint Model, Discrete Timoshenko Beam Constrain Model, Finite Element Method and Experiment
1 year ago
Authors:
Trương Văn Mến,Trần Văn Điền,Dương Minh Hùng
Publication date:
20 / 04 / 2022
Name of Publishers:
SPRINGER- Lecture Notes in Mechanical Engineering
Abstract:
Compliant mechanisms have received significant attention for the last decade due to their potential applications in various fields. A comparative study on a large deflection of a common compliant mechanism applying two analytical models that are discrete Euler beam constraint model (DEBCM) and discrete Timoshenko beam constraint model (DTBCM) compared with a finite element analysis (FEA), and verified by the experimental data is presented in this paper. The deflection characteristics of a bistable mechanism obtained from DEBCM and DTBCM models show a good agreement with that obtained from FEA and the experimental results. The shear deformation effect in the Timoshenko theory does not have a considerable influence on the force-displacement analysis of the typical bistable mechanism compared to DEBCM. However, to obtain an accurate result of the force-displacement relation for large deflection beam in the analytical models, it is required to divide a flexural beam into a certain number of segments. The results indicate that both DEBCM and DTBCM can be used to predict the mechanical behavior of compliant mechanisms under applied loads.