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Last Updated: 22 September 2022

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Influence of Linear and Stepped Variation in Wall Thickness on the Energy Absorption Efficiency of Square Tubes Under Axial Compression

Vehicle research and development have increasingly focused on energy conservation and safety. One of the ways to minimize the initial peak crush force is to introduce thickness variation in thin-walled tubes. Square tubes with linearly and stepwise varying wall thickness tubes were manufactured in the u201d vertical milling machine with the aid of slip gauges in providing gradients and steps in this research. The crushing behavior of LVST and SVST tubes were experimentally characterized, and their initial peak crushing force and energy absorption were determined, subsequently. Compared to uniform thickness tubes, the IPCF of LVST and SVST tubes was reduced by 244 percent and 3071% respectively, down by 24 percent and 3071% respectively. The results showed that LVST and SVST tubes can increase deformation performance and be used as energy absorbers in place of uniform tubes in automotive fields, in place of uniform tubes.

Source link: https://doi.org/10.1007/978-981-19-3895-5_23


Stock Price Prediction Using Principal Component Analysis and Linear Regression

Stock price prediction is based on estimates that change in the price of stocks is constant and is affected by various industries and market conditions. To determine the future stock value of a company is the primary purpose of stock price prediction. The model's high dimensionality is a limitation for machine learning algorithms due to the fact that tightly linked measurements/attributes can have a huge effect on precision. Prior to and following the introduction of Principal Component Analysis on the Tesla stock price estimates, a linear regression algorithm is used.

Source link: https://doi.org/10.1007/978-981-19-4052-1_28


Finite Element Method Based Determination of Non-linear Inductances of Three Phase Induction Motor

Accurate parameter determination of any model of motor is an important feature that enhances accurate motor results. With the change of load on the motor, the resultant of load on the motor increases, leading to motor inductances that became non-linear with each step on the motor. The method used in this research determines the non-linear inductances of the three-phase induction motor developed on a finite element system that develops the two-dimensional motor model in FEM package ANSYS Maxwell Electronics Desktop's two-dimensional motor model. For the sake of comparing the findings, constant values of motor inductances are also obtained from the traditional tests on the induction motor i. e.

Source link: https://doi.org/10.1007/978-981-19-2004-2_47


Numerical Study of a Horizontal Axis Washing Machine for Linear and Nonlinear Vibration

Linear and nonlinear vibration tests of a drum type washing machine with two springs and two dampers have been carried out numerically. A mathematical model of horizontal axis type washing machine is created by considering the entire system as a single degree of freedom system. A comparison of the linear and nonlinear mathematical model is carried out since the vibration level is high during the spinning cycle and therefore nonlinear spring stiffness is considered. The damper with a high dampness ratio and linear spring with low stiffness effectively reduced the vibration level, according to this review.

Source link: https://doi.org/10.1007/978-981-19-2188-9_70


Indirect Reduced-Order Modelling of Non-conservative Non-linear Structures

Finite element models are often used to create engineering structures. Due to the large number of degrees of freedom, doing non-linear dynamic analysis on high-fidelity FE models can be prohibitively computationally costly. The salient dynamics of the FE model can be captured precisely in a smaller, computationally cheap reduced-order model, according to non-linear reduced-order modeling.

Source link: https://doi.org/10.1007/978-3-031-04086-3_6


Prediction of Shear Capacity of Reinforced Concrete Column Using Non-linear Finite Element Method

Shear's failure in reinforced concrete columns in buildings often discovered after an earthquake has resulted in destroyed concrete columns. Many studies have been published on shear failure in reinforced concrete. With several different locations of shear reinforcement, we have conducted study. It has been found that shear reinforcement placement has an effect on the confinement of reinforced concrete columns. It's a challenge today to predict the failure pattern of reinforced concrete columns using the finite element method. ATENA V5 is a non-linear finite element analysis that uses the following research: The objectives of this study were to investigate column behavior and lateral loads, as well as predict crack pattern by using a non-linear finite element method. With a height of 58 cms, Reinforced concrete column specimen with a square cross section of size 20 cm2 with a 58 cm height. Main reinforcements were 12D11. 6 mm, and stirrup reinforcement was D5. 4 mm. The concrete compression strength was 24. 19 MPa. Based on the ATENA V. 5 test results, it was discovered that the shear load was 150 Mpa in three arms of stirrup reinforcement specimens. Deflection was 19. 36 mm based on an ATENA V. 5 test report. The shear load was 150 Mpa based on ATENA V. 5 findings, on the other hand, in cross-ties of a stirrup sample. According to ATENA V. 5's result for deflection, the deflection was 23. 21 mm. Meanwhile, experimental findings for both three arms and crossties of stirrup reinforcement show the same pattern as that predicted by the non-linear finite element. All columns had shear failure, according to a numerical analysis, which has revealed her error mode.

Source link: https://doi.org/10.1007/978-981-19-3629-6_22


A Comparison Between PDEM-Based Approach and Linear-Regression-Based Approach in Seismic Fragility Assessment: Application into Low-Rise Frame Buildings

A comparison between probability density evolution method-based analysis and a linear-regression-based assessment of seismic fragility assessment is made in this paper, and an application to low-rise frame building is carried out for implementation. Comparatively, the PDEM-based approach saves the heavy computation burden as Monte Carlo simulation, and depicts the fragility characteristics with great fidelity as a linear-regression-based earthquake engineering's first step.

Source link: https://doi.org/10.1007/978-981-19-5217-3_87

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions