Topology optimization of compliant mechanisms using the. The present study aims at providing a topology optimization of multimaterial compliant mechanisms using solid isotropic material with penalization simp approach. Read topology optimization of compliant mechanisms by xianmin zhang available from rakuten kobo. Vijayan, et al passive vibration isolation by compliant mechanism using topology optimization figure 1. The continuumbased approach generates compliant mechanisms topology, shape and size from a single piece of material using topology optimization for given deformation requirements 7,8, 9. Compliant mechanisms are jointfree monolithic substitutes for multimembered rigidbody mechanisms.
Integrated topology and shape optimization software for. The optimization problem emphasizes actuator accuracy and it is formulated to yield optimal compliant mechanism configurations that maximize the desired output displacement when a. Compliant mechanism via topology optimization youtube. A tree structure with three levels of design concentration to categorize the cited papers is used. Topology optimization of compliant mechanisms with stress. Topology optimization to is a mathematical method that optimizes material layout within a given design space, for a given set of loads, boundary conditions and constraints with the goal of. In various applications, design problems involving structures and compliant mechanisms experience fluidic pressure loads. Multiobjective topology extraction of the compliant mechanisms. This paper presents a method for optimal design of compliant mechanism topologies. This paper proposes and investigates two formulations to topology design of compliant mechanisms subjected to. The method is based on continuumtype topology optimization techniques and finds the optimal compliant mechanism topology within a given design domain and a given position and direction of input and output forces. The method is based on continuumtype topology optimization techniques and finds the optimal compliant mechanism topology within a given design domain and a given position and direction of. This paper is focused on the topology design of compliant mechanisms undergoing large displacement over 20% of the structural dimension.
This book covers various topics regarding the design of compliant mechanisms using topology optimization that have attracted a great deal of attention in recent decades. The predominant methods of computational topology design. Topology optimization of compliant mechanisms xianmin. A multiresolution method for 3d multimaterial topology optimization computer methods in applied mechanics and engineering, vol. Topology optimization of compliant mechanisms with desired. Passive vibration isolation by compliant mechanism using. Topology optimization of compliant mechanisms ebook by. They offer numerous advantages in their manufacturing and performance. Topology optimization of compliant mechanisms based on the. One important application is the design of compliant mechanisms. During topology optimization of such design problems, these loads adapt their direction and location with the evolution of the design, which poses various challenges. First, the objectives of the design problem are posed by modeling the output loads using several springs to enable control of the inputoutput.
The method is based on continuumtype topology optimization techniques and finds the optimal compliant. Design of flexure hinges provides practical answers and directions to the needs of efficiently designing, analyzing, and optimizing devices that include flexure hinges. The design of compliant mechanisms using topology optimization techniques has been exhaustively explored in previous decades. Topology optimization of compliant mechanisms based on. Topology optimization of compliant mechanisms request pdf. Based on the artificial spring model and the geometrically. Topology optimization and flexible building block design. Ananthasuresh, a comparative study of the formulations and benchmark problems for the topology optimization of compliant mechanisms. Design of compliant mechanisms using continuum topology. The ersl research group focuses on largescale topology optimization, design for additive manufacturing, and high performance finite element analysis fea. A computational design tool for compliant mechanisms. Topology optimization and flexible building block design and analysis of compliant mechanism for vibration isolation rajesh r, v vijayan, t karthikeyan abstract compliant mechanisms are designed. Compliant mechanisms rely on the deflection of flexible members to store energy in the form of strain energy.
Topology synthesis of compliant mechanisms using an. This article presents an application of stressconstrained topology optimization to compliant mechanism design. Design of planar largedeflection compliant mechanisms. A procedure for the topology design of compliant mechanisms with multiple output requirements is presented. Parameterization on flexure hinges are done based on the output displacement and equivalent stress. Topology optimization of compliant mechanism with geometrical advantage. This stored energy is similar to the potential energy in a deflected spring. Multiobjective topology optimization of a compliant. Topology optimization of compliant mechanisms considering. The main difficulties associated with the traditional problem of volume minimization with stress constraints, that are the large number of local stress constraints and the singularity phenomenon 1, also affect the compliant mechanism design. In applying topology optimization to design compliant mechanisms, one of the.
A new densitybased topology optimization approach using darcys law in conjunction with a drainage term. This paper describes a design for precision method based on a topology optimization method tom for compliant mechanisms that includes thermal compensation features. Robust design of large displacement compliant mechanisms is achieved by lazarov et. Topology optimization of compliant mechanisms with. Thus, numerical examples are presented to demonstrate the ability of proposed methods to solve topology optimization problems. A computational design tool for compliant mechanisms siggraph 2017 presentation duration. Topology optimization of compliant mechanisms based on the beso method a thesis submitted in fulfillment of the requirements for the degree of doctor of philosophy yan li bciveng, mconstmgmt. Generally, an efficient compliant mechanism as shown in fig. Topology optimization of geometrically nonlinear compliant. Asme 2016 international design engineering technical conferences. An improved materialmask overlay strategy for topology optimization of structures and compliant mechanisms j. Design of compliant mechanisms considering thermal effect. This book covers various topics regarding the design of compliant mechanisms using topology.
A simple evolutionary topology optimization procedure for. For a compliant mechanism, it has the potential of reducing part count, mechanical. A reliabilitybased topology optimization of the compliant mechanism problem can be set to an optimization model, where the objective is to maximize the possibility p of the output performance j being larger than a target value j with several constraints that limit the failure probabilities associated with the volume fraction, input. Pennsyn a topology synthesis software for compliant mechanisms. Two methods for handling the multiple output requirements are developed, a combined virtual load method and a weighted sum of objectives method. Paper open access related content a new method for. Design of largedisplacement compliant mechanisms by. Topology optimization is an important tool employed in the design of high performance structures. Topology optimized compliant mechanisms have been widely utilized as the microdevices in microelectromechanical system. The problem formulations and numerical solution procedures are discussed and illustrated by design examples. Speeding up topology optimization of compliant mechanisms. Conceptual design of compliant mechanisms for flapping.
A novel topology optimization approach is proposed in this paper for the design of three rotational degreeoffreedom dof spatially compliant mechanisms, combining the jacobian isomorphic. Topology optimization of spatially compliant mechanisms. Des june, 2010 geometric modeling and synthesis of spatial. We present a computational tool for designing compliant mechanisms. Homogenization or material distribution method based topology optimization will create final topologies in grey level image and saw tooth jump discontinuity boundaries that are not suitable for direct. Our method takes as input a conventional, rigidlyarticulated. Handling stress constraints in topology optimization of compliant mechanisms is a challenging task.
Compliant mechanisms zwhat is a compliant mechanism. An output displacement maximization formulation is used, together. Topology optimization of compliant mechanisms with curvilinear fiber path laminated composites xinxing tong, wenjie ge, and yonghong zhang proceedings of the institution of mechanical engineers. The topology optimization method is used to find the distribution of material phases that extremizes an objective function e. Since commercial software solutions were not able to fulfil this need, some particular tools have been developed internally to be able to generate the geometry for compliant mechanisms. Sigmund, on the design of compliant mechanisms using topology optimization, dcamm report 535, tu denmark, 1996. Topology optimization, compliant mechanisms, stress constraints, fatigue 1. Topology optimization of geometrically nonlinear structures and compliant mechanisms. Example of clupi exo mars mission bracket redesigned with topology optimization. On the design of compliant mechanisms using topology. Topology optimization and analysis for double acting. Stressconstrained topology optimization for compliant. Compliant mechanism design through topology optimization using pseudorigidbody models.
Two methods for handling the multiple output requirements are developed. This paper presents a method for topology optimization of largedeflection compliant mechanisms with multiple inputs and outputs by considering the coupling issue. Introduction compliant mechanisms are a relatively new breed of jointless and monolithic mechanisms that gains. Ananthasuresh, an optimality criteria approach for the. This dissertation explores topology optimization techniques for designing compliant mechanisms actuated by forces. Topology optimization of compliant suspension mechanisms.