Use of functional specifications as objective functions in topological optimization of compliant mechanism

Instead of using the concepts of minimum compliance or maximum mutual compliance, alternative formulation, based on functional specification is proposed to solve for topology of compliant mechanism. Among mechanical advantage, geometrical advantage and work ratio, one of the functional specification...

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Bibliographic Details
Published in:Computer methods in applied mechanics and engineering 2001-05, Vol.190 (34), p.4421-4433
Main Authors: Lau, G.K., Du, H., Lim, M.K.
Format: Article
Language:English
Subjects:
Compliant mechanism
Computational techniques
Condensed matter: structure, mechanical and thermal properties
Deformation and plasticity (including yield, ductility, and superplasticity)
Elasticity, elastic constants
Exact sciences and technology
Functional specifications
Mathematical methods in physics
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Optimal design
Physics
Topological optimization
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Summary:Instead of using the concepts of minimum compliance or maximum mutual compliance, alternative formulation, based on functional specification is proposed to solve for topology of compliant mechanism. Among mechanical advantage, geometrical advantage and work ratio, one of the functional specifications is posed as objective function while displacement constraint and material constraint are imposed. The topological design of compliant mechanism is then solved as a problem of material distribution using spring and SIMP model without filtering technique. The solution of this problem is obtained by using the method of moving asymptotes (MMA). The effect of problem formulation on final topology of compliant mechanism is then illustrated using two examples and the results are compared against their rigid-body counterparts.
ISSN:0045-7825
1879-2138
DOI:10.1016/S0045-7825(00)00325-X