scholarly journals A Novel Topology Optimization Methodology Based on Energy Minimization Via α-β Swap Move

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 162041-162048
Author(s):  
Meng Xia ◽  
Shiyou Yang
Keyword(s):  
Topology Optimization ◽  
Energy Minimization ◽  
Optimization Methodology

An efficient 3D homogenization-based topology optimization methodology

2021 ◽  
Author(s):  
Konstantinos-Iason Ypsilantis ◽  
George Kazakis ◽  
Nikos D. Lagaros
Keyword(s):  
Topology Optimization ◽  
Optimization Methodology

A general multi-objective topology optimization methodology developed for customized design of pelvic prostheses

2019 ◽  
Vol 69 ◽  
pp. 8-16 ◽  
Author(s):  
Taimoor Iqbal ◽  
Ling Wang ◽  
Dichen Li ◽  
Enchun Dong ◽  
Hongbin Fan ◽  
...  
Keyword(s):  
Topology Optimization ◽  
Multi Objective ◽  
Optimization Methodology

Frequency-based dynamic topology optimization methodology for improved door closing sound quality

2019 ◽  
Vol 234 (7) ◽  
pp. 1311-1322 ◽  
Author(s):  
Gozde Tuncer ◽  
Polat Sendur
Keyword(s):  
Topology Optimization ◽  
Element Model ◽  
Optimization Method ◽  
Sound Quality ◽  
Sum Of Squares ◽  
Design Parameters ◽  
Design Constraint ◽  
Front Door ◽  
Optimization Methodology ◽  
Material Layout

Door closing sound quality of a vehicle has become one of the most important customer-related quality metrics in the recent years. There has been a vast amount of information on the design parameters contributing to this attribute in the literature. Amongst them, damping pad on the door outer panel emerges as one of the most significant factors on the door closing sound quality. In this paper, we apply solid isotropic material with penalization topology optimization method to determine the optimum material layout for within a given volume constraint on a front door of a typical vehicle. The objective function of the topology optimization is chosen as the minimization of residual sum of squares of the accelerance of the door outer panel up to 200 Hz. The optimization problem is subject to design constraint to use a predetermined percentage of the full damping pad. The methodology is demonstrated on the finite element model of front door of a Toyota vehicle. Two optimization case studies using 60% and 45% of the damping pad on the door outer panel are introduced as a result of the application of the proposed topology optimization methodology. In addition, more manufacturable optimization configurations with the same % of the damping pad are suggested as a means for more feasible application by automotive original equipment manufacturers. All the optimization configurations are compared to each other on (i) accelerance spectrum up to 200 Hz, (ii) residual sum of squares of the accelerance, and (iii) weight of the damping pad. The results show that it is possible to improve the aforementioned metrics significantly by the application of topology optimization.

scholarly journals Enforcing a Force–Displacement Curve of a Nonlinear Structure Using Topology Optimization with Slope Constraints

2020 ◽  
Vol 10 (8) ◽  
pp. 2676 ◽  
Author(s):  
Jongsuh Lee ◽  
Thibaut Detroux ◽  
Gaëtan Kerschen
Keyword(s):  
Topology Optimization ◽  
Structural Features ◽  
Optimization Process ◽  
Displacement Curve ◽  
Optimization Approach ◽  
Nonlinear Structure ◽  
The Difference ◽  
Optimization Methodology ◽  
Force Displacement ◽  
Slope Constraints

The objective of this study is to develop an optimization methodology to find a layout that traces a prescribed force–displacement curve through a topology optimization approach. To this end, we propose an objective function to minimize the difference between a prescribed force–displacement curve and the curve calculated at each iteration of the optimization process. Slope constraints are introduced to solve issues encountered when using a small number of target points. In addition, a projection filter is employed to suppress the gray region observed between the solid and void regions, which generally occurs when using a density-based filter. A recently proposed energy interpolation scheme is implemented to stabilize the instability in the nonlinear analysis, which generally results from excessive distortion in the void region when the structure is modeled on a fixed mesh in the topology optimization process. To validate the outlined methodology, several case studies with different types of nonlinearity and structural features of the obtained layouts are investigated.

Optimization Methodology for an Automotive Composite Hood

2013 ◽  
Author(s):  
Alberto Lazzarini ◽  
Alessandro Valgimigli ◽  
Andrea Baldini ◽  
Enrico Dolcini ◽  
Stefano Sangermano
Keyword(s):  
Composite Material ◽  
Topology Optimization ◽  
Automotive Industry ◽  
Point Of View ◽  
Design Phase ◽  
Trial And Error ◽  
Varying Thickness ◽  
Optimization Methodology ◽  
Prototype Phase ◽  
Actual Part

The current emissions regulations lead car manufacturers to look carefully for weight reduction. In the automotive industry the classic trial-and-error approach to design is becoming inadequate and techniques based on optimization are necessary to improve the design process. In this study a methodology to design a sport-car front hood is proposed. The process carried out could also be extended to car components characterised by a similar configuration. Starting from the geometry of the actual part, a design volume has been defined. The first step consists of a topology optimization performed considering the material as isotropic (aluminium properties): the output is a rough structure which accomplishes all the imposed targets. The interpretation of the topology results brings to a re-design phase aimed at realising a feasible component. The subsequent optimization step is dedicated to composite material structures and acts on the component plybook, varying thickness and orientation of each ply to find the best solution complying with targets. Finally, the component has to be reviewed from a technological point of view in order to be virtually delivered and to proceed with the prototype phase.

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