A study on the deformation and crushing of copper tubing: experiments, theory & FE modelling

Richard Turner;

doi:10.25082/mer.2019.01.005

Representation of bolted joints in a structure using finite element modelling and model updating

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.14.3.2020.15.0560 ◽

2020 ◽

Vol 14 (3) ◽

pp. 7141-7151 ◽

Cited By ~ 1

Author(s):

R. Omar ◽

M. N. Abdul Rani ◽

M. A. Yunus

Keyword(s):

Finite Element ◽

Dynamic Behaviour ◽

Model Updating ◽

Complex Structure ◽

Bolted Joints ◽

Model Parameters ◽

Fe Model ◽

Bolted Joint ◽

Fe Modelling ◽

Joint Structure

Efficient and accurate finite element (FE) modelling of bolted joints is essential for increasing confidence in the investigation of structural vibrations. However, modelling of bolted joints for the investigation is often found to be very challenging. This paper proposes an appropriate FE representation of bolted joints for the prediction of the dynamic behaviour of a bolted joint structure. Two different FE models of the bolted joint structure with two different FE element connectors, which are CBEAM and CBUSH, representing the bolted joints are developed. Modal updating is used to correlate the two FE models with the experimental model. The dynamic behaviour of the two FE models is compared with experimental modal analysis to evaluate and determine the most appropriate FE model of the bolted joint structure. The comparison reveals that the CBUSH element connectors based FE model has a greater capability in representing the bolted joints with 86 percent accuracy and greater efficiency in updating the model parameters. The proposed modelling technique will be useful in the modelling of a complex structure with a large number of bolted joints.

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3D coupled thermo‐mechanical FE modelling and simulation of radial‐axial ring rolling

Materials Research Innovations ◽

10.1179/143307511x12858957673437 ◽

2011 ◽

Vol 15 (sup1) ◽

pp. s221-s224 ◽

Cited By ~ 8

Author(s):

G Zhou ◽

L Hua ◽

J Lan ◽

D S Qian

Keyword(s):

Modelling And Simulation ◽

Ring Rolling ◽

Fe Modelling ◽

Axial Ring

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Comparison of steel frames with RWS and WFP beam-to-column connections through seismic fragility analysis

Advances in Structural Engineering ◽

10.1177/1369433220977284 ◽

2020 ◽

pp. 136943322097728

Author(s):

Haoran Yu ◽

Weibin Li

Keyword(s):

Limit State ◽

Pushover Analysis ◽

Steel Frames ◽

Fragility Analysis ◽

Structural Safety ◽

Seismic Fragility ◽

Fe Modelling ◽

Collapse Resistance ◽

Seismic Collapse ◽

Probabilistic Seismic Demand

Reduced web section (RWS) connections and welded flange plate (WFP) connections can both effectively improve the seismic performance of a structure by moving plastic hinges to a predetermined location away from the column face. In this paper, two kinds of steel frames—with RWS connections and WFP connections—as well as different frames with welded unreinforced flange connections were studied through seismic fragility analysis. The numerical simulation was conducted by using multiscale FE modelling. Based on the incremental dynamic analysis and pushover analysis methods, probabilistic seismic demand analysis and seismic capability analysis were carried out, respectively. Finally, combined with the above analysis results, probabilistic seismic fragility analysis was conducted on the frame models. The results showed that the RWS connection and WFP connection (without double plates) have little influence on reducing the maximum inter-storey drift ratio under earthquake action. RWS connections slightly reduce the seismic capability in non-collapse stages and improve the seismic collapse resistance of a structure, which exhibits good structural ductility. WFP connections can comprehensively improve the seismic capability of a structure, but the seismic collapse resistance is worse than that of RWS connections when the structure has a large number of storeys. The frame with WFP connections has a lower failure probability at every seismic limit state, while the frame with RWS connections sacrifices some of its structural safety in non-collapse stages to reduce the collapse probability.

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CAD-Based 3D-FE Modelling of AISI-D3 Turning with Ceramic Tooling

Machines ◽

10.3390/machines9010004 ◽

2021 ◽

Vol 9 (1) ◽

pp. 4

Author(s):

Panagiotis Kyratsis ◽

Anastasios Tzotzis ◽

Angelos Markopoulos ◽

Nikolaos Tapoglou

Keyword(s):

Statistical Model ◽

Cutting Speed ◽

Depth Of Cut ◽

Fe Model ◽

Fe Modelling ◽

3D Finite Element ◽

Force Components ◽

Four Levels ◽

The Relationship ◽

Strong Agreement

In this study, the development of a 3D Finite Element (FE) model for the turning of AISI-D3 with ceramic tooling is presented, with respect to four levels of cutting speed, feed, and depth of cut. The Taguchi method was employed in order to create the orthogonal array according to the variables involved in the study, reducing this way the number of the required simulation runs. Moreover, the possibility of developing a prediction model based on well-established statistical tools such as the Response Surface Methodology (RSM) and the Analysis of Variance (ANOVA) was examined, in order to further investigate the relationship between the cutting speed, feed, and depth of cut, as well as their influence on the produced force components. The findings of this study point out an increased correlation between the experimental results and the simulated ones, with a relative error below 10% for most tests. Similarly, the values derived from the developed statistical model indicate a strong agreement with the equivalent numerical values due to the verified adequacy of the statistical model.

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CFRP Origami Metamaterial with Tunable Buckling Loads: A Numerical Study

Materials ◽

10.3390/ma14040917 ◽

2021 ◽

Vol 14 (4) ◽

pp. 917

Author(s):

Houyao Zhu ◽

Shouyan Chen ◽

Teng Shen ◽

Ruikun Wang ◽

Jie Liu

Keyword(s):

Numerical Study ◽

Buckling Load ◽

Fe Modelling ◽

Buckling Loads ◽

Folding Angle ◽

Mechanical Responses ◽

Reinforced Plastic ◽

Rate Of Increase ◽

Practical Engineering ◽

Identical Rate

Origami has played an increasingly central role in designing a broad range of novel structures due to its simple concept and its lightweight and extraordinary mechanical properties. Nonetheless, most of the research focuses on mechanical responses by using homogeneous materials and limited studies involving buckling loads. In this study, we have designed a carbon fiber reinforced plastic (CFRP) origami metamaterial based on the classical Miura sheet and composite material. The finite element (FE) modelling process’s accuracy is first proved by utilizing a CFRP plate that has an analytical solution of the buckling load. Based on the validated FE modelling process, we then thoroughly study the buckling resistance ability of the proposed CFRP origami metamaterial numerically by varying the folding angle, layer order, and material properties, finding that the buckling loads can be tuned to as large as approximately 2.5 times for mode 5 by altering the folding angle from 10° to 130°. With the identical rate of increase, the shear modulus has a more significant influence on the buckling load than Young’s modulus. Outcomes reported reveal that tunable buckling loads can be achieved in two ways, i.e., origami technique and the CFRP material with fruitful design freedoms. This study provides an easy way of merely adjusting and controlling the buckling load of lightweight structures for practical engineering.

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A First Step towards a Tribological Approach to Investigate Cutting Tool Wear

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.611-612.452 ◽

2014 ◽

Vol 611-612 ◽

pp. 452-459 ◽

Cited By ~ 1

Author(s):

Giovenco Axel ◽

Frédéric Valiorgue ◽

Cédric Courbon ◽

Joël Rech ◽

Ugo Masciantonio

Keyword(s):

Tool Wear ◽

Cutting Tool ◽

304L Stainless Steel ◽

Fe Modelling ◽

Wear Model ◽

Cutting Tool Wear ◽

The Will ◽

Preliminary Study ◽

The Impact ◽

Macroscopic Parameters

The present work is motivated by the will to improve Finite Element (FE) Modelling of cutting tool wear. As a ﬁrst step, the characterisation of wear mechanisms and identiﬁcation of a wear model appear to be fundamental. The key idea of this work consists in using a dedicated tribometer, able to simulate relevant tribological conditions encountered in cutting (pressure, velocity). The tribometer can be used to estimate the evolution of wear versus time for various tribological conditions (pressure, velocity, temperature). Based on this design of experiments, it becomes possible to identify analytically a wear model. As a preliminary study this paper will be focused on the impact of sliding speed at the contact interface between 304L stainless steel and tungsten carbide (WC) coated with titanium nitride (TiN) pin. This experiment enables to observe a modiﬁcation of wear phenomena between sliding speeds of 60 m/min and 180 m/min. Finally, the impact on macroscopic parameters has been observed.

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On the influence of the NO equilibrium reaction on mixed potential sensor signals: A comparison between FE modelling and experimental data

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2019.126627 ◽

2019 ◽

Vol 296 ◽

pp. 126627 ◽

Cited By ~ 3

Author(s):

Thomas Ritter ◽

Julia Lattus ◽

Gunter Hagen ◽

Ralf Moos

Keyword(s):

Experimental Data ◽

Mixed Potential ◽

Fe Modelling ◽

Equilibrium Reaction ◽

Sensor Signals

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Creep Simulation of the Hydroprocessing Reactor Using a Physically-Based CDM Model

Volume 3: Design and Analysis ◽

10.1115/pvp2015-45416 ◽

2015 ◽

Cited By ~ 1

Author(s):

Yu Zhou ◽

Chen Xuedong ◽

Fan Zhichao ◽

Jie Dong

Keyword(s):

Damage Mechanics ◽

Failure Modes ◽

Elevated Temperatures ◽

Three Dimensional ◽

Critical Issue ◽

Fe Modelling ◽

Creep Failure ◽

Good Tool ◽

Element Analysis ◽

Physically Based

Creep failure is one of the most important failure modes in the design of hydroprocessing reactors at elevated temperatures, and the accurate prediction of the creep behavior in structural discontinuities is a critical issue for component design. A physically-based continnum damage mechanics (CDM) model was adopted to describe all three creep stages of 2.25Cr-1Mo-0.25V ferritic steel widely used in manufacturing modern hydroprocessing reactors. The material constants in the damage constitutive equations were identified using an efficient optimization scheme based on genetic algorithm (GA). The user-defined subroutine implementing the CDM model was developed using user programmable features (UPFs) in ANSYS. Three-dimensional finite element analysis of the hydroprocessing reactor was conducted to determine the critical regions, and the studies on the stress redistribution and the prediction of damage evolution in these regions during creep were carried out. The results show that FE modelling based on CDM theory can provide a good tool for creep design of complex engineering components.

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