Convergence of Finite Element Model for Crushing of a Conical Thin-walled Tube

Ahmad, Muhammad Munsif; Ismail, K.A.; Mat, Fauziah

doi:10.1016/j.proeng.2013.02.075

Cited by 21 publications

(11 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Stress-strain curve and material parameters were obtained from literature [3]. Convergence study was conducted and the FE model converged at element size of 2.8 mm because incorrect mesh size results in error in the findings [14]. Contact automatic surface to surface algorithm with 0.3 and 0.2 static and dynamic coefficients were employed between the tube and rigid plate to avoid lateral movement.…”

Section: Crashworthiness Parametersmentioning

confidence: 99%

Numerical investigations in to crashworthiness characteristics of steel conical tubes

Rafukka

2018

Nig. J. Tech.

View full text Add to dashboard Cite

This work investigates the crash response of conical tubes made from different steel grades ranging from low to high strength steels using finite element (FE) simulations. The FE model was first validated against experimental results before being applied for the numerical analysis using LS DYNA software. Peak crushing load, mean load, energy absorption, crush force efficiency (CFE) and specific energy absorption (SEA) were evaluated from the cones of different steel grades and of various thicknesses. It was found that high strength steel exhibit high SEA and low CFE values. Both SEA and CFE were found to increase with increase in tube wall thickness for the five steel compared. For improved safety of the occupant, steel-CA5 is best because of higher CFE values for 1.5 mm, 2.0 mm and 2.5mm thicknesses. For better weight reduction, steel-DP600 with SEA of 10.6 kJ/kg is the best. Steel-HA3 and steel-SAP H440 with 2.5 mm thickness offer moderate CFE and SEA values. The findings of this study are useful in designing high safety performance vehicle front energy absorption components.

show abstract

Section: Crashworthiness Parametersmentioning

confidence: 99%

Numerical investigations in to crashworthiness characteristics of steel conical tubes

Rafukka

2018

Nig. J. Tech.

View full text Add to dashboard Cite

show abstract

“…The study of mesh convergence is fundamental and in scientific literature some techniques are described to evaluate the convergence errors of the mesh [ 42 , 46 ]. Such errors in convergence make it possible to define the accuracy of the numerical solution, despite not knowing the exact solution [ 3 ].…”

Section: Fe Modelmentioning

confidence: 99%

“…The stresses are obtained from the first derivative of the displacement field and are calculated using the equation: with [ K ] reference is made to the global stiffness matrix, while with [ n ] and [ F ] to the displacement and force vector respectively. The stress values are an average of the stresses of all the elements connected to the node and this introduces the magnitude error of the stress value; the coarser the mesh, the greater the difference between the stress values of the adjacent elements [ 3 ]. As the mesh density increases, the nodal and elemental stress values are more similar, and the accuracy also increases and the time required for simulation also increases [ 46 ].…”

Section: Fe Modelmentioning

confidence: 99%

Evaluation of wave configurations in corrugated boards by experimental analysis (EA) and finite element modeling (FEM): the role of the micro-wave in packaging design

Russo

Desole

Gisario

et al. 2023

Int J Adv Manuf Technol

View full text Add to dashboard Cite

The aim of this paper is to study the mechanical behavior of corrugated board boxes, focusing attention on the strength that the boxes are able to offer in compression under stacking conditions. A preliminary design of the corrugated cardboard structures starting from the definition of each individual layer, namely the outer liners and the innermost flute, was carried out. For this purpose, three distinct types of corrugated board structures that include flutes with different characteristics, namely the high wave (C), the medium wave (B), and even the micro-wave (E), were comparatively evaluated. More specifically, the comparison is able to show the potential of the micro-wave which would eventually allow a significant saving of cellulose in the fabrication process of the boxes, thus reducing the manufacturing costs and causing a lower environmental footprint. First, experimental tests were carried out to determine the mechanical properties of the different layers of the corrugated board structures. Tensile tests were performed on samples extracted from the paper reels used as base material for the manufacturing of the liners and flutes. Instead, the edge crush test (ECT) and box compression test (BCT) were directly performed on the corrugated cardboard structures. Secondly, a parametric finite element (FE) model to allow, on a comparative basis, the study of the mechanical response of the three different types of corrugated cardboard structures was developed. Lastly, a comparison between the available experimental results and the outputs of the FE model was carried out, with the same model being also adapted to evaluate additional structures where the E micro-wave was usefully combined with the B or C wave in a double-wave configuration.

show abstract

“…Therefore, the designers should ensure that the generated grid structure uses the minimum computational effort while providing that the structure does not affect the attained solution. In other words, a mesh independence study should be conducted before deciding the final mesh structure since it can cause significant differences in the obtained output [33]. For the present study, the velocity of the fluid at the center of the pipe is used as the control point.…”

Section: Grid Generationmentioning

confidence: 99%

Manyetik Alan Altinda Nanoakişkanlarin Akiş Karakteristiklerinin İncelenmesi

Aytaç

2022

Politeknik Dergisi

View full text Add to dashboard Cite

The existence/application of an externally induced magnetic field, like in satellite cooling applications, causes a decrement in heat transfer when used with nanofluids. This study investigates the flow characteristics and velocity profile of distilled water, alumina nanofluid, and cobalt ferrite ferrofluid in a horizontal cylindrical heat pipe flowing in a laminar regime and being exposed to an external magnetic field. All of the simulations were performed with ANSYS Fluent MHD module, for a concentration of 2%, Reynolds number of 10, and Hartmann numbers of 25, 50, and 150. The velocity profiles, pressure drops, and flow characteristics are examined by varying the magnetic field intensity while keeping all other parameters constant. It is concluded that an external magnetic field causes a deterioration in the velocity profiles of the nanofluid, especially in cobalt ferrite, while it does not have a significant effect on water. When the magnitude of the magnetic field is increased by 2 times, it is seen that the velocity of the fluid decreases by 6% and increasing the magnetic field from 0 to 50 Tesla causes a deceleration rate of 9%, which leads to the conclusion that application of a magnetic field for the first time has a more significant slowing effect when comparing it to increasing the magnetic field. In addition, when a magnetic field of 50 Tesla is considered, the maximum velocity of alumina is lower than that of water by 5.10%, and the maximum velocity of cobalt ferrite is lower by 28.57%.

show abstract

Convergence of Finite Element Model for Crushing of a Conical Thin-walled Tube

Cited by 21 publications

References 10 publications

Numerical investigations in to crashworthiness characteristics of steel conical tubes

Numerical investigations in to crashworthiness characteristics of steel conical tubes

Evaluation of wave configurations in corrugated boards by experimental analysis (EA) and finite element modeling (FEM): the role of the micro-wave in packaging design

Manyetik Alan Altinda Nanoakişkanlarin Akiş Karakteristiklerinin İncelenmesi

Contact Info

Product

Resources

About