Cost and Weight Optimization of Hybrid Parts Using a Multi-material Topology Optimization Approach

An Evolutionary Multi-Objective Optimization Approach to the Topology Optimization of Auxetic Structures

Volume 2: 28th Design Automation Conference ◽

10.1115/detc2002/dac-34149 ◽

2002 ◽

Cited By ~ 1

Author(s):

Ashraf O. Nassef

Keyword(s):

Topology Optimization ◽

Elastic Modulus ◽

Finite Elements ◽

Multiobjective Optimization ◽

Poisson Ratio ◽

Optimization Approach ◽

Multi Objective Optimization ◽

Finite Elements Analysis ◽

Multi Objective ◽

Auxetic Structures

Auxetic structures are ones, which exhibit an in-plane negative Poisson ratio behavior. Such structures can be obtained by specially designed honeycombs or by specially designed composites. The design of such honeycombs and composites has been tackled using a combination of optimization and finite elements analysis. Since, there is a tradeoff between the Poisson ratio of such structures and their elastic modulus, it might not be possible to attain a desired value for both properties simultaneously. The presented work approaches the problem using evolutionary multiobjective optimization to produce several designs rather than one. The algorithm provides the designs that lie on the tradeoff frontier between both properties.

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A non-homogeneous multi-material topology optimization approach for functionally graded structures with cracks

Composite Structures ◽

10.1016/j.compstruct.2021.114230 ◽

2021 ◽

pp. 114230

Author(s):

Thanh T. Banh ◽

Nam G. Luu ◽

Dongkyu Lee

Keyword(s):

Topology Optimization ◽

Functionally Graded ◽

Optimization Approach ◽

Graded Structures ◽

Functionally Graded Structures

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A new stress-based topology optimization approach for finding flexible structures

Structural and Multidisciplinary Optimization ◽

10.1007/s00158-021-02960-w ◽

2021 ◽

Author(s):

Martin Noack ◽

Arnold Kühhorn ◽

Markus Kober ◽

Matthias Firl

Keyword(s):

Topology Optimization ◽

Stress State ◽

Design Space ◽

Flexible Structures ◽

Optimization Approach ◽

Principal Stresses ◽

Output Displacement ◽

Design Concepts ◽

Flexible Designs ◽

Gauss Points

AbstractThis paper presents a new FE-based stress-related topology optimization approach for finding bending governed flexible designs. Thereby, the knowledge about an output displacement or force as well as the detailed mounting position is not necessary for the application. The newly developed objective function makes use of the varying stress distribution in the cross section of flexible structures. Hence, each element of the design space must be evaluated with respect to its stress state. Therefore, the method prefers elements experiencing a bending or shear load over elements which are mainly subjected to membrane stresses. In order to determine the stress state of the elements, we use the principal stresses at the Gauss points. For demonstrating the feasibility of the new topology optimization approach, three academic examples are presented and discussed. As a result, the developed sensitivity-based algorithm is able to find usable flexible design concepts with a nearly discrete 0 − 1 density distribution for these examples.

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Synthesis and Numerical Analysis of Compliant devices – A Topology Optimization Approach for Mechanisms and Robotic Systems

10.21203/rs.3.rs-940149/v1 ◽

2021 ◽

Author(s):

Premanand Sathyanarayanamurthi ◽

ARUNKUMAR GOPAL

Keyword(s):

Topology Optimization ◽

Optimization Design ◽

Rectangular Domain ◽

Dynamic State ◽

Optimization Approach ◽

Design And Development ◽

Design Synthesis ◽

Final Destination ◽

Prototype Development ◽

External Forces

Abstract The Topology Optimization design invariably shall be used in various applications like Aerojet designs, Aircraft Engineering designs and innovative systems for improving the efficiency of structure. The paper emphasizes more on general Topology Optimization design for a rectangular domain. The domain numerically analyzed with defined geometry setting and defined boundary conditions for finding the Stress and displacement. In this Topology Optimization Design synthesis, the result is suitable volume and mass reduction in the Aerojet application parts which further can be taken for Prototype development in 3D printing and experimentally test with safety characteristics and compares Objective functions chosen for design and development. The design can be used for other various automotive and aerospace devices based on deformation level and application of external forces. The Final destination of this design and development ends with passing Fatigue Endurance test cycle test pass condition in Aerojet and automotive vehicles in static and dynamic state.

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Topology Optimization of Deformable Bodies with Linear Dynamic Impact and Frictionless Contact Condition

Applied Sciences ◽

10.3390/app112210518 ◽

2021 ◽

Vol 11 (22) ◽

pp. 10518

Author(s):

Gil-Eon Jeong

Keyword(s):

Topology Optimization ◽

Optimization Approach ◽

Dynamic Impact ◽

Frictionless Contact ◽

Linear Dynamic ◽

Highly Nonlinear ◽

Simple Part ◽

Deformable Bodies ◽

Increasing Demand ◽

The Impact

There has been an increasing demand for the design of an optimum topological layout in several engineering fields for a simple part, along with a system that considers the relative behaviors between adjacent parts. This paper presents a method of designing an optimum topological layout to achieve a linear dynamic impact and frictionless contact conditions in which relative behaviors can be observed between adjacent deformable parts. The solid isotropic method with penalization (SIMP) method is used with an appropriate filtering scheme to obtain an optimum topological layout. The condensed mortar method is used to handle the non-matching interface, which inevitably occurs in the impact and contact regions, since it can easily apply the existing well-known topology optimization approach even in the presence of a non-matching interface. The validity of the proposed method is verified through a numerical example. In the future, the proposed optimization approach will be applied to more general and highly nonlinear non-matching interface problems, such as friction contact and multi-physics problems.

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A Systematic Topology Optimization Approach for Optimal Stiffener Design

Volume 2: 24th Design Automation Conference ◽

10.1115/detc98/dac-5611 ◽

1998 ◽

Author(s):

Jian Hui Luo ◽

Hae Chang Gea

Keyword(s):

Topology Optimization ◽

Location Problem ◽

Eigenvalue Problems ◽

Three Dimensional ◽

Orthotropic Materials ◽

Optimization Approach ◽

Design Domain ◽

Plate Structures ◽

Shell Plate

Abstract A systematic topology optimization approach is developed to design the optimal stiffener of three dimensional shell/plate structures in static and eigenvalue problems. Optimal stiffener design involves the determination of the best location and orientation. In this paper, the stiffener location problem is solved by a microstructure-based design domain method and the orientation probelm is modeled as an optimal orientation problem of equivalent orthotropic materials, which is solved by a newly developed energy based method. Examples are presented to demonstrate the application of the proposed approach.

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