Energy Absorption Capability of Thin-Walled Prismatic Aluminum Tubes with Spherical Indentations

Ferdynus, Mirosław; Różyło, Patryk; Rogala, Michał

doi:10.3390/ma13194304

Cited by 20 publications

(7 citation statements)

References 22 publications

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“…Finite Element Method is a computational method, to which it is possible to solve complex, time-consuming problems of mathematical analysis and those that do not have analytical solutions. This is possible by performing discretization and then determining differential or algebraic equations [19][20][21][22][23][24][25]. The strength analysis was performed in the Abaqus program.…”

Section: Methodsmentioning

confidence: 99%

Application of the finite element method to the design of an ankle orthosis

Stefańczak

Gajewski

Rogala

2021

J. Phys.: Conf. Ser.

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AFO (Ankle-Foot Orthosis), which covers the ankle and foot, protects and supports the ankle joint as well as the structures around it. It contributes to the maintenance of the correct gait cycle. Owing to orthoses, the functional capacity of the body part is significantly improved, and so is the quality of life for the user. Personalized orthoses, which are adapted to the anatomy of the user, are more and more often produced by the additive methods. The use of 3D printing for the manufacturing medical devices is becoming increasingly common due to the low cost of the whole process, short production time and the possibility of the product personalization. One of the stages in manufacturing AFOs with the additive method is to create a three-dimensional model of the orthosis in CAD software. Finite element analysis was performed to assess the mechanical properties of the orthosis. The influence of geometry and the materials used were investigated with FEM analysis software. As a result of structural analysis during the design stage, the assessment of the medical device in terms of its durability and mechanical resistance without putting the user at risk is possible. On the basis of the obtained results, the structure strength was compared.

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Section: Methodsmentioning

confidence: 99%

Application of the finite element method to the design of an ankle orthosis

Stefańczak

Gajewski

Rogala

2021

J. Phys.: Conf. Ser.

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“…The paper [16] presents the results of numerical tests of impact and energy absorption capacity of thin-walled aluminum columns, having a square cross-section and spherical indentations on their lateral surfaces. The numerical models were validated using an experiment conducted on the drop hammer.…”

Section: State Of Art: An Overviewmentioning

confidence: 99%

Identification of crashworthiness indicators of column energy absorbers with triggers in the form of cylindrical embossing on the lateral edges using artificial neural networks

Ferdynus¹,

Gajewski²

2022

Eksploatacja i Niezawodność – Maintenance and Reliability

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The paper presents the possibility of neural network application in order to identify the most advantageous design variants of column energy absorbers in terms of the achieved energy absorption indicators. Design variants of the column energy absorber made of standard thin-walled square aluminium profile with triggers in the form of four identical cylindrical embossments on the lateral edges were considered. These variants differ in the diameter of the trigger, its depth and position. The geometrical parameters of the trigger are crucial for the energy absorption performance of the energy absorber. The following indicators are studied: PCF (Peak Crushing Force), MCF (Mean Crushing Force), CLE (Crash Load Efficiency), SE (Stroke Efficiency) and TE (Total Efficiency). On the basis of numerical studies validated by experimentation, a neural network has been created with the aim of predicting the above-mentioned indices with an acceptable error for an energy absorber with the trigger of specified geometrical parameters and position. The paper demonstrates that the use of an effective multilayer perceptron can successfully speed up the design process, saving time on multivariate time-consuming analyses.

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“…An element may fail prematurely, provoking the transmission of impact forces to passengers. To counter these harmful effects, the optimal crashworthiness design of thin-walled structures (TWS) is necessary [4][5][6][7][8]. Nowadays, biologically inspired TWS has demonstrated improvements in energy absorption with a decrease in the initial peak load [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Bending crashworthiness of bionic thin-walled structures inspired by sugar cane stalks

Estrada

Reynoso

Szwedowicz

et al. 2022

J. Phys.: Conf. Ser.

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Recently, the design of biologically inspired thin-walled structures has been increasingly popular due to the successful adaptation of biological organisms to their environments due to millions of years of evolution. Plants with high bending resistance to counter the effect of wind forces on slender and tall stalks can be found in nature. To this end, this paper investigates the bending crashworthiness of mechanical structures inspired by sugar cane (Saccharum officinarum). The biological patterns of sugar cane were obtained with a Scanning Electron Microscope, and five bionic thin-walled structures (BTWS) were considered. In all cases, the structures were modeled with 6063-T5 aluminum and numerically evaluated using the finite element method using a three-point bending test. The effects of cross-section configuration on the crashworthiness performance of the structure were investigated. Our results show a better version of the BTWSs relative to a typical circular profile. An increase in energy absorption from 15.60% to 40.27% was computed. The best CFE performance was obtained for a structure defined by a central octagon surrounded by smaller trapeziums. Such a structure is therefore highly recommended for bending crashworthiness applications.

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Energy Absorption Capability of Thin-Walled Prismatic Aluminum Tubes with Spherical Indentations

Cited by 20 publications

References 22 publications

Application of the finite element method to the design of an ankle orthosis

Application of the finite element method to the design of an ankle orthosis

Identification of crashworthiness indicators of column energy absorbers with triggers in the form of cylindrical embossing on the lateral edges using artificial neural networks

Bending crashworthiness of bionic thin-walled structures inspired by sugar cane stalks

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