Design of lightweight magnesium car body structure under crash and vibration constraints

Kiani, Morteza; Gandikota, Imtiaz; Rais‐Rohani, Masoud; Motoyama, Keiichi

doi:10.1016/j.jma.2014.05.005

Cited by 121 publications

(51 citation statements)

References 14 publications

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“…The most commonly used material interpolation model method, SIMP formula, is expressed as: (1) where E 0 is the initial elastic modulus; p is the penalty factor, p > 1;…”

Section: Multi-objective Topology Optimization Theory Setupmentioning

confidence: 99%

“…The future direction of automotive lightweighting includes the systematic design and integration of optimized design methods for automotive structural parts, multi-material integration, and lightweighting technologies. Therefore, the use of modern optimization methods to improve the design of automotive lightweight structural parts can achieve multiple goals of reducing vehicle energy consumption, reducing emissions and improving the overall performance of the vehicle [1][2][3].…”

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confidence: 99%

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Lightweight Frame Topology Optimization Method Based on Multi-objective

Lyu¹,

Liu²,

Ju³

2018

JMSE-B

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Abstract:The application of new materials is an important direction for automotive lightweighting. On the basis of ensuring the comprehensive performance of components, the optimization of new material structures through topology optimization methods can further improve the level of lightweight components. This paper takes the automobile frame as the research object, based on the magnesium alloy, studies the frame topology with the objective function of mass and strength under multiple working conditions, and realizes the lightweight of the automobile frame structure through the multi-objective topology optimization method. According to the topological optimization method of penalty function for solid isotropic materials, the objective function of the quality topology optimization and the objective function of intensity topology optimization under multi-operating conditions are defined by the compromised programming approach. This method avoids the disadvantage that single-target topology optimization cannot consider other factors and is suitable for multi-objective topology optimization of continuum structures.

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“…The most commonly used material interpolation model method, SIMP formula, is expressed as: (1) where E 0 is the initial elastic modulus; p is the penalty factor, p > 1;…”

Section: Multi-objective Topology Optimization Theory Setupmentioning

confidence: 99%

mentioning

confidence: 99%

Lightweight Frame Topology Optimization Method Based on Multi-objective

Lyu¹,

Liu²,

Ju³

2018

JMSE-B

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“…In the past decade, the Mg-Gd-Y-Zn based alloys containing long period stacking ordered (LPSO) structures have been shown to exhibit excellent mechanical properties, including the high tensile strength of over 500 MPa at room temperature [8][9][10][11][12]. The outstanding property can be…”

Section: Introductionmentioning

confidence: 99%

On the microstructure and mechanical property of as-extruded Mg-Gd-Y-Zn alloy with Sr addition

Liu

Diao

Chai

et al. 2017

Materials Science and Engineering: A

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In this study, microstructure evolutions of 0.2, 0.6) alloys (named as sample 0Sr, 0.2Sr, 0.6Sr) during heat-treatment and extrusion were investigated. As-cast sample 0Sr contains typical long period stacking ordered (LPSO) phases and Mg 3 RE. With Sr addition, amounts of LPSO phases decrease and are gradually replaced by the Mg 17 Sr 2 phases. After homogenization and annealing treatment, profuse strip LPSO phases readily precipitate in grain interiors of sample 0Sr, while only Mg 17 Sr 2 and Mg 3 RE phases are detected in samples 0.2Sr and 0.6Sr. It suggests that the Sr addition would inhibit LPSO phases. After extrusion, the bimodal grain structures, the bulk and strip LPSO phases are detected in sample 0Sr, which can contribute to providing strengthening and extra strain hardening. In as-extruded sample 0.2Sr, finer recrystallized grain size, bulk Mg 17 Sr 2 and LPSO phases (micron-scale) and Mg 5 RE phase (nano-scale) are found due to the pre-annealing treatment. However, lower amounts of both nano-sized and macro-sized LPSO phases lead to the low ultimate strength (300 MPa). In sample 0.6Sr, the strip LPSO phases are readily formed even though the length and total amounts of LPSO phases decrease.More bulk Mg 17 Sr 2 phases and LPSO phases are also precipitated, which lead to the more superior yield and ultimate strengths of 0.6Sr sample under higher temperature, as compared with the 0Sr sample.2

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“…Genetic Algorithm (GA) [2], Particle Swarm Optimization (PSO) [3], Simulated Annealing [4], and Artificial Bee Colony (ABC) [5] are the typical algorithms that are used for searching the global optimum point. Besides the global optimization algorithms, local optimization algorithms such as Sequential Quadratic Programming (SQP) have been used by some automotive researchers to design car body structures [6][7][8]. Unlike global search algorithms, local search algorithms converge fast but may get stuck in local minima.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Non-traditional Methods for Vehicle Crashworthiness and NVH Optimization

Kiani

Yıldız

2015

Arch Computat Methods Eng

Self Cite

135

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In this paper, metamodeling and five wellknown metaheuristic optimization algorithms were used to reduce the weight and improve crash and NVH attributes of a vehicle simultaneously. A high-fidelity full vehicle model is used to analyze peak acceleration, intrusion and component's internal-energy under Full-Frontal, Offset-Frontal, and Side crash scenarios as well as vehicle natural frequencies. The radial basis functions method is used to approximate the structural responses. A nonlinear surrogate-based mass minimization was formulated and solved by five different optimization algorithms under crash-vibration constraints. The performance of these algorithms is investigated and discussed.

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Design of lightweight magnesium car body structure under crash and vibration constraints

Cited by 121 publications

References 14 publications

Lightweight Frame Topology Optimization Method Based on Multi-objective

Lightweight Frame Topology Optimization Method Based on Multi-objective

On the microstructure and mechanical property of as-extruded Mg-Gd-Y-Zn alloy with Sr addition

A Comparative Study of Non-traditional Methods for Vehicle Crashworthiness and NVH Optimization

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