scholarly journals Generation of Link Mechanism by Shape-Topology Optimization of Trusses Considering Geometrical Nonlinearity

2009 ◽  
Vol 3 (1) ◽  
pp. 46-53 ◽  
Author(s):  
Makoto OHSAKI ◽  
Shinji NISHIWAKI
Keyword(s):  
Topology Optimization ◽  
Geometrical Nonlinearity ◽  
Link Mechanism ◽  
Topology Optimization Of Trusses

Design of Planar Large-Deflection Compliant Mechanisms With Decoupled Multi-Input-Output Using Topology Optimization

2019 ◽  
Vol 11 (3) ◽  
Author(s):  
Benliang Zhu ◽  
Qi Chen ◽  
Hai Li ◽  
Hongchuan Zhang ◽  
Xianmin Zhang
Keyword(s):  
Topology Optimization ◽  
Large Deflection ◽  
Compliant Mechanisms ◽  
Geometrical Nonlinearity ◽  
Method Comparison ◽  
Output Coupling ◽  
Large Displacements ◽  
Interpolation Scheme ◽  
Input Output ◽  
Output Behavior

This paper presents a method for topology optimization of large-deflection compliant mechanisms with multiple inputs and outputs by considering the coupling issue. First, the objectives of the design problem are posed by modeling the output loads using several springs to enable control of the input–output behavior. Second, a scheme is proposed to obtain a completely decoupled mechanism. Both input coupling and output coupling are considered. Third, with the implementation of an energy interpolation scheme to stabilize the numerical simulations, the geometrical nonlinearity is considered to appropriately capture the large displacements of compliant mechanisms. Finally, several numerical examples are presented to demonstrate the validity of the proposed method. Comparison studies with the obtained results without considering the coupling issues are also presented.

scholarly journals Topology optimization of trusses using bars exchange method

2012 ◽  
Vol 60 (2) ◽  
pp. 185-189 ◽  
Author(s):  
D. Bojczuk ◽  
A. Rębosz-Kurdek
Keyword(s):  
Topology Optimization ◽  
Cost Minimization ◽  
Exchange Method ◽  
Cross Sectional ◽  
First Case ◽  
Constraint Set ◽  
Topology Optimization Of Trusses ◽  
The Cost ◽  
Multiple Load Case ◽  
Multiple Load

Abstract. The algorithm of optimization of trusses is presented in the paper, where for topology optimization the bars exchange method is used. In the first case, the problem aimed at cost minimization with a constraint set on global stiffness is formulated. In the second case, the problem of minimizing the cost function subjected to stress and cross-sectional area constraints is discussed and here the multiple-load case is taken into consideration. The conditions for introduction of topology modification and its acceptance are specified. The paper is illustrated with three examples.

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