OPTIMIZATION OF HONEYCOMB IMPACT ATTENUATOR USING GENETIC ALGORITHM BASED ON RESPONSE SURFACE METHOD AND DESIGN OF EXPERIMENT; PART I: CRASHWORTHINESS

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ALISADEGHI MARYAM; FAZILATI JAMSHID

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Journal: Modares Mechanical Engineering Year:2016 | Volume:15 | Issue:12 Page(s): 25-36

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Title

OPTIMIZATION OF HONEYCOMB IMPACT ATTENUATOR USING GENETIC ALGORITHM BASED ON RESPONSE SURFACE METHOD AND DESIGN OF EXPERIMENT; PART I: CRASHWORTHINESS

Author(s)

ALISADEGHI MARYAM | FAZILATI JAMSHID | Issue Writer Certificate

Keywords

HONEYCOMB STRUCTUREQ2

CRASHWORTHINESSQ2

LS-DYNA FINITE ELEMENT CODEQ2

DESIGN OF EXPERIMENTQ2

PARAMETRIC STUDYQ1

Abstract

In this study, the design and optimization of a honeycomb energy absorber is performed using genetic algorithm. The main design goal is to absorb almost all the impact energy. Simultaneously, reduction of the shock force level is also considered as a main objective. In the first part, the CRASHWORTHINESS behavior of HONEYCOMB STRUCTURE is parametrically studied. The results are utilized in the second part to optimize shock absorber design. In this part, aluminum HONEYCOMB STRUCTURE under dynamic loading is investigated using simulation in LS-DYNA FINITE ELEMENT CODE. Parametric studies are invoked to identify the influence of different model parameters on CRASHWORTHINESS characteristics of HONEYCOMB STRUCTURE. Reducing the computational cost, a repeatable model of 'Y' cross section column is numerically simulated. The effects of changes in material properties including Young's modulus, yield stress, tangent modulus, geometrical properties such as cell size, foil thickness, as well as the effects of impact velocity on the deformation behavior of the structure were investigated. A number of 25 different geometries with same height and various cell sizes and thicknesses are studied and effects of thickness and cell size on the energy absorption properties are investigated. Results showed that CRASHWORTHINESS parameters such as mean and peak stress depend mainly on cell size and thickness values, while the friction coefficient and young's modulus are of less importance. Any change in absorber’s geometry affects the mean collapse stress more severely than the peak stress. In the meantime, thickness change is more effective in comparison with cell size change.

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APA: Copy

ALISADEGHI, MARYAM, & FAZILATI, JAMSHID. (2016). OPTIMIZATION OF HONEYCOMB IMPACT ATTENUATOR USING GENETIC ALGORITHM BASED ON RESPONSE SURFACE METHOD AND DESIGN OF EXPERIMENT; PART I: CRASHWORTHINESS. MODARES MECHANICAL ENGINEERING, 15(12), 25-36. SID. https://sid.ir/paper/179915/en

Vancouver: Copy

ALISADEGHI MARYAM, FAZILATI JAMSHID. OPTIMIZATION OF HONEYCOMB IMPACT ATTENUATOR USING GENETIC ALGORITHM BASED ON RESPONSE SURFACE METHOD AND DESIGN OF EXPERIMENT; PART I: CRASHWORTHINESS. MODARES MECHANICAL ENGINEERING[Internet]. 2016;15(12):25-36. Available from: https://sid.ir/paper/179915/en

IEEE: Copy

MARYAM ALISADEGHI, and JAMSHID FAZILATI, “OPTIMIZATION OF HONEYCOMB IMPACT ATTENUATOR USING GENETIC ALGORITHM BASED ON RESPONSE SURFACE METHOD AND DESIGN OF EXPERIMENT; PART I: CRASHWORTHINESS,” MODARES MECHANICAL ENGINEERING, vol. 15, no. 12, pp. 25–36, 2016, [Online]. Available: https://sid.ir/paper/179915/en

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