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Journal articles on the topic 'DFLUX'

Author: Grafiati

Published: 23 June 2021

Last updated: 29 July 2025

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1

Piekarska, W., M. Kubiak, Z. Saternus, and K. Rek. "Computer Modelling of Thermomechanical Phenomena in Pipes Welded using a Laser Beam." Archives of Metallurgy and Materials 58, no. 4 (2013): 1237–42. http://dx.doi.org/10.2478/amm-2013-0156.

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Abstract This study concerns numerical modelling and computer simulation of thermomechanical phenomena accompanying spiral welding of pipes made of stainless steel X5CrNi18-10 using a laser beam. Based on Abaqus FEA software, 3D numerical analysis was performed. Power distribution of spirally moving heat source was implemented into additional DFLUX subroutine, written in Fortran programming language. Thermomechanical properties of steel changing with temperature were taken into account in the analysis. The efficiency of material melting by different welding sources as well as the influence of

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2

Zhao, Lei, Lu Sun, and Tong Jiang Fan. "Temperature Field Analysis of CRTS-II Ballastless Track Slab Structure on Soil Subgrade." Applied Mechanics and Materials 587-589 (July 2014): 1255–61. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.1255.

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Temperature changes have a significant impact on the CRTS-II track structure in Beijing-Shanghai high-speed railway which has longitudinally connected type. In this paper temperature fields of ballastless track superstructure are simulated based on heat transfer theory and subroutine of ABAQUS that solar radiation DFLUX and ambient temperature FILM. The results showed that: the maximum temperature difference on the top of track slab is 20°C in summer and 10°C in winter; the maximum temperature difference in CA mortar layer is 4°C in summer and 2°C in winter; the maximum temperature difference

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3

Xie, Wanying, Ji Li, Feiyun Sun, and Wenyi Dong. "Antifouling Ability of Hydrophilic PVDF-TiO2 membrane Evaluated by Critical Flux and Threshold Flux." E3S Web of Conferences 144 (2020): 01015. http://dx.doi.org/10.1051/e3sconf/202014401015.

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The PVDF flat-membrane was modified by hydrophilic nano-TiO2, which blending by ultrasonication and mechanical stirring pretreatment in phase inversion method. To evaluate the permeate productivity and anti-fouling capacity of protein solution, both the critical flux (JCW) and threshold flux (JTH) of PVDF and PVDF-TiO2 membrane were firstly measured by Advanced Constant Pressure-step Method in cross-flow filtration apparatus. Some evaluation indicators were utilized to analyze the results, such as Flux vs. Time and TMP vs. Time Curves, flux decline rate (dFlux/dt) and TMP-Fluxave curve. Two ty

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4

Song, Z. K., Z. Y. Li, J. Xu, and Y. C. Sun. "Effects of Heat Source Model and Welding Speed on Welding Temperature Field for a Plan Carbon Steel Plant." Applied Mechanics and Materials 488-489 (January 2014): 83–89. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.83.

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This article studies the effects of heat source shape parameter and welding speed on the evolution of welding temperature field for Q345 plan carbon steel. The heat input and heat source parameters as well as the welding speed are defined by applying DFLUX subroutine in ABAQUS to simulate the transient welding temperature. The effects of heat resource shape parameters and heat input as well as the welding speed on welding temperature field are investigated by means of finite element analysis. It has been found that heat source parameters and welding speed show strong influence on temperature d

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5

Pan, Yunping, Cheng Zhang, and Zhongyin Feng. "Welding residual stress analysis based on ABAQUS direct coupling." Journal of Physics: Conference Series 2879, no. 1 (2024): 012009. http://dx.doi.org/10.1088/1742-6596/2879/1/012009.

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Abstract Taking the welded joints of the drive axle shell and half shaft casing as the research object, based on the ABAQUS engineering software and its DFLUX subroutine, numerical simulation of the residual stresses of the welded joints before and after the heat treatment is carried out by adopting the direct coupling of temperature-displacement and the method of birth-death unit, to analyze the improvement effect of post-weld heat treatment on the residual stress of welded joints. The results show that the heat treatment process significantly reduces the equivalent peak stress of welded join

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Yang, Pengcheng, Xuqiu Teng, and Haidong Guo. "Study on stud performance of steel UHPC composite structure based on temperature." Journal of Physics: Conference Series 2085, no. 1 (2021): 012024. http://dx.doi.org/10.1088/1742-6596/2085/1/012024.

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Abstract The stress and deformation of the specimen under static load and temperature load coupling are deduced by simulation. With the help of finite element software ABAQUS, the user subroutines DFLUX and FILM are called to introduce the temperature field, so as to realize the analysis and Research on the stress, displacement, PEEQ, arrangement and load slip curve of the stud under different action conditions. The results show that based on the existence of temperature stress, the service performance of studs under coupling action is significantly lower than that under static action alone, a

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Wang, Xiaoying, Kai Li, Yang Zhong, and Qian Xu. "Investigation of Thermal Reflective Cracking in Asphalt Pavement Using XFEM Coupled with DFLUX Subroutine and FILM Subroutine." Arabian Journal for Science and Engineering 44, no. 5 (2018): 4795–805. http://dx.doi.org/10.1007/s13369-018-3554-y.

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Ahmad, Abdulrahaman Shuaibu, Yunxin Wu, Hai Gong, and Lin Nie. "Finite Element Prediction of Residual Stress and Deformation Induced by Double-Pass TIG Welding of Al 2219 Plate." Materials 12, no. 14 (2019): 2251. http://dx.doi.org/10.3390/ma12142251.

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Finite element (FE) analysis of welding residual stress and deformation is one of the essential stages in the manufacturing process of mechanical structures and parts. It aids in reducing the production cost, minimizing errors, and optimizing the manufactured component. This paper presents a numerical prediction of residual stress and deformation induced by two-pass TIG welding of Al 2219 plates. The FE model was developed using ABAQUS and FORTRAN packages, Goldak’s heat source model was implemented by coding the nonuniform distributed flux (DFLUX) in user subroutine to represent the ellipsoid

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9

Hu, Ze Xun, Jian Ping Zhao, and Ying Jie Zhang. "Numerical Simulation of Residual Stress in P91 Repair Welding Incorporating Martensitic Transformation." Key Engineering Materials 795 (March 2019): 416–23. http://dx.doi.org/10.4028/www.scientific.net/kem.795.416.

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The type IV cracking is one of the main reasons for service failure. The repair welding is implemented to solve this problem. The residual stress in P91 repair welding incorporating martensitic transformation (MT) is acquired through finite element simulation. In the simulation, the ABAQUS and the user subroutines FILM, DFLUX, HETVAL, USDFLD, UEXPAN and UHARD are adopted. The effect of MT latent heat on temperature and the effects of the volume expansion, the yield strength change and the transformation plasticity on stress are considered. The results show that there is full MT in the repair w

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10

Saib, Cherif, Salah Amroune, Mohamed-Saïd Chebbah, Ahmed Belaadi, Said Zergane, and Barhm Mohamad. "Thermal, Metallurgical, and Mechanical Analysis of Single-Pass INC 738 Welded Parts." Metals 15, no. 6 (2025): 679. https://doi.org/10.3390/met15060679.

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This study presents numerical analyses of the thermal, metallurgical, and mechanical processes involved in welding. The temperature fields were computed by solving the transient heat transfer equation using the ABAQUS/Standard 2024 finite element solver. Two types of moving heat sources were applied: a surface Gaussian distribution and a volumetric model, both implemented via DFLUX subroutines to simulate welding on butt-jointed plates. The simulation accounted for key welding parameters, including current, voltage, welding speed, and plate dimensions. The thermophysical properties of the INC

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11

Yang, Gaiyan, Liguang Zhu, Wei Chen, Xingwang Yu, and Baomin He. "Initiation of Surface Cracks on Beam Blank in the Mold during Continuous Casting." Metals 8, no. 9 (2018): 712. http://dx.doi.org/10.3390/met8090712.

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Surface cracking seriously affects the quality of beam blanks, a relatively new blank in the continuous casting in China. In order to study the mechanism of the initiation and propagation of surface cracks, this study established a 2D micro-segmented model of the solidification process for a beam blank in the mold, with a user subroutine DFLUX written in Fortran. Using a contact algorithm, the stress in the shell of the beam was analyzed considering the mechanical properties of the material (Q235B), thermal stress, surface friction force and ferrostatic pressure. The results showed that at the

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12

Wang, Yan, Bo Yan, Ting Jiang, et al. "Dynamic evolution simulation of ablation zone in water-jet assisted laser machining of Korean pine (Pinus koraiensis)." BioResources 17, no. 3 (2022): 4673–88. http://dx.doi.org/10.15376/biores.17.3.4673-4688.

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In order to solve the difficulties with the observation of the ablation zone and the many factors that affect the dynamic evolution process of the ablation zone, the structural morphology and dynamic evolution process of the ablation zone in the process of water-jet assisted laser machining Korean pine (Pinus koraiensis) were studied. Based on the DFLUX subprogram, a compound heat source model was established. Under the comprehensive consideration of heat conduction, heat convection, heat radiation, and thermal physical properties varying with temperature, the three-dimensional (3D) finite ele

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13

Domański, Tomasz, Wiesława Piekarska, Zbigniew Saternus, Marcin Kubiak, and Sebastian Stano. "Numerical Prediction of Strength of Socket Welded Pipes Taking into Account Computer Simulated Welding Stresses and Deformations." Materials 15, no. 9 (2022): 3243. http://dx.doi.org/10.3390/ma15093243.

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The paper presents a numerical model based on the finite element method (FEM) to predict deformations and residual stresses in socket welding of different diameter stainless steel pipes made of X5CrNi18-10 steel. The next part of the paper concerns the determination of strength properties of a welded joint in terms of a shear test. A thermo-elastic–plastic numerical model is developed using Abaqus FEA software in order to determine the thermal and mechanical phenomena of the welded joint. This approach requires the implementation of moveable heat source power intensity distribution based on ci

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14

Djendara, Abdelhakim Amine, Melouka Benyamina, Abdallah Benzaama, Mohamed El Amine Khiari, and Mohamed Bencherif. "Thermal and residual stress analysis of multi-pass welded stainless steel pipes using DEFLUX and FILM subroutine." STUDIES IN ENGINEERING AND EXACT SCIENCES 5, no. 2 (2024): e11380. https://doi.org/10.54021/seesv5n2-601.

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This study presents an in-depth investigation of the influence of welding parameters (welding speed and number of passes) on the residual stress distribution in AISI 304 (Z7CN18-09) austenitic stainless-steel tubes. A three-dimensional finite element modeling (FEM), developed in ABAQUS, was implemented to simulate the circumferential welding process. The DFLUX and FILM subroutines were implemented to model the double ellipsoid mobile heat source and thermal boundary conditions, respectively. Model validation was performed by comparing weld bead profiles and thermal cycles with experimental res

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15

Gulve, Dhiraj Vishwanath, and Dinesh Kumar Shukla. "FEA of friction stir welding of AA1100 and parametric optimization using genetic algorithm." IOP Conference Series: Materials Science and Engineering 1248, no. 1 (2022): 012024. http://dx.doi.org/10.1088/1757-899x/1248/1/012024.

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Abstract 3D uncoupled thermo-mechanical analysis of friction stir welding (FSW) of aluminum alloy AA1100 was carried out using FEM. The heat generated in the FSW process is applied via DFLUX subroutine of ABAQUS. Simulations with different process parameters such as welding speed and rotational speed were performed for the estimation of temperature generated during the FSW process. Thermal analysis’s output is applied as thermal loads during mechanical analysis. Subsequently, residual stress developed during the FSW process was found out. Residual stresses were measured along the selected path

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16

Sattarpanah Karganroudi, Sasan, Mahmoud Moradi, Milad Aghaee Attar, et al. "Experimental and Numerical Analysis on TIG Arc Welding of Stainless Steel Using RSM Approach." Metals 11, no. 10 (2021): 1659. http://dx.doi.org/10.3390/met11101659.

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This study involves the validating of thermal analysis during TIG Arc welding of 1.4418 steel using finite element analyses (FEA) with experimental approaches. 3D heat transfer simulation of 1.4418 stainless steel TIG arc welding is implemented using ABAQUS software (6.14, ABAQUS Inc., Johnston, RI, USA), based on non-uniform Goldak’s Gaussian heat flux distribution, using additional DFLUX subroutine written in the FORTRAN (Formula Translation). The influences of the arc current and welding speed on the heat flux density, weld bead geometry, and temperature distribution at the transverse direc

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17

Moghadasi, K., and KF Tamrin. "Multi-pass laser cutting of carbon/Kevlar hybrid composite: Prediction of thermal stress, heat-affected zone, and kerf width by thermo-mechanical modeling." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 234, no. 9 (2020): 1228–41. http://dx.doi.org/10.1177/1464420720930754.

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Numerical modeling offers considerable promise to reduce costs associated with trial-and-error process in the manufacturing industry. In laser cutting of fiber-reinforced composites, the developed thermal stress in the cut region has considerable inﬂuence on the application of the machined composite and the end product quality. Nevertheless, measurement of the thermal stress is quite challenging in practice. Here, an uncoupled thermo-mechanical finite element model is developed to accurately predict formation of heat-affected zone, kerf width, thermal field, and thermal residual stress of an a

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18

Samal, S., U. Nath, V. Yadav, and R. Purohit. "Finite element analysis of deformation behaviour of circular sheet during laser forming process." E3S Web of Conferences 430 (2023): 01283. http://dx.doi.org/10.1051/e3sconf/202343001283.

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Laser forming of sheet metal involves inducing a bending process through the application of thermal stress using a defocused laser source. In laser forming the formation of bowl-shaped shapes requires the input of various laser process parameters. In this study, we investigate the thermo-mechanical deformation behaviour of a circular plate subjected to laser irradiation scanning. To analyse this phenomenon, we employ the Finite Element Method (FEM) with the aid of the software ABAQUS 6.10. The moving laser heat source is modelled as Gaussian heat flux, and DFLUX subroutine is written in FORTRA

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19

Assarzadeh, Saeed, and Majid Ghoreishi. "Electro-thermal-based finite element simulation and experimental validation of material removal in static gap single-spark die-sinking electro-discharge machining process." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 231, no. 1 (2016): 28–47. http://dx.doi.org/10.1177/0954405415572661.

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Existing single spark models are subjected to too simplistic assumptions such as uniform or point heat source, constant plasma radius, invariable materials properties and constant surface temperature during discharge making them far from reality. In this study, more realistic assumptions including Gaussian type distribution of spark heat flux, temperature dependent materials properties, latent heat of melting and expanding plasma channel with pulse current and time have been made to establish a comprehensive modeling platform. The ABAQUS FEM software has been used to simulate the mechanism of

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20

Zou, Shuai, Jun Xiao, Jianping Xian, Yongshui Zhang, and Jingfeng Zhang. "Three-Dimensional Temperature Field Simulation and Analysis of a Concrete Bridge Tower Considering the Influence of Sunshine Shadow." Applied Sciences 13, no. 8 (2023): 4769. http://dx.doi.org/10.3390/app13084769.

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This paper forms a set of three-dimensional temperature field simulation methods considering the influence of sunshine shadow based on the DFLUX subroutine and FILM subroutine interface provided by the Abaqus platform to simulate the three-dimensional temperature field of concrete bridge towers and study its distribution law. The results show that the method has high accuracy for shadow recognition and temperature field calculation. The maximum difference between the shadow recognition results and the theoretical calculation value was only 19.1 mm, and the maximum difference between the simula

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21

Wang, Qiusheng, Jianping Xian, Jun Xiao, and Shuai Zou. "Simulation Study on Sunshine Temperature Field of a Concrete Box Girder of the Cable-Stayed Bridge." Sustainability 15, no. 9 (2023): 7541. http://dx.doi.org/10.3390/su15097541.

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This paper investigates the distribution of the sunshine temperature field in bridge structures. To implement thermodynamic boundary conditions on the structure under the influence of sunshine, this study utilized the FILM and DFLUX subroutines provided by ABAQUS. Based on this method, the sunshine temperature field of the concrete box girder of a cable-stayed bridge was analyzed. The results showed that the simulated temperature values were in good agreement with the measured values. The temperature difference between the internal and external surfaces of the box girder under the influence of

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22

Meyghani, Bahman, and Reza Teimouri. "A Framework to Simulate Friction Stir Additive Manufacturing (FSAM) Using the Finite Element Method." Micromachines 15, no. 3 (2024): 303. http://dx.doi.org/10.3390/mi15030303.

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Defining an accurate friction model without having the mesh distortion in an optimized computational time has always been a significant challenge for modelling solid-state natural processes. The presented paper proposes an Eulerian frictional-based solid static model for the accurate modeling of sliding and sticking conditions for the friction stir additive manufacturing process (FSAM). For the frictional behavior, a modified friction model is proposed to investigate the sliding and sticking conditions during the process. The magnesium alloy is selected as the workpiece material and AZ31B-F is

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23

Cui, Zhaoxing, Xiaodong Hu, Shiyun Dong, Shixing Yan, and Xuan Zhao. "Numerical Simulation and Experimental Study on Residual Stress in the Curved Surface Forming of 12CrNi2 Alloy Steel by Laser Melting Deposition." Materials 13, no. 19 (2020): 4316. http://dx.doi.org/10.3390/ma13194316.

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The performance and service life of the nuclear emergency diesel engine shaft made of 12CrNi2 alloy steel is very important for the safety of nuclear power. Laser melting deposition (LMD) is a challenging camshaft-forming technology due to its high precision, rapid prototyping, and excellent parts performance. However, LMD is an unsteady process under the local action of laser, especially for curved surface forming, which is more likely to generate large residual stress on components, resulting in cracks and other defects. At present, the stress research on LMD curved surface forming is relati

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24

Adimurthi, G. D. Veerappa Gowda, and Jérôme Jaffré. "The DFLU flux for systems of conservation laws." Journal of Computational and Applied Mathematics 247 (August 2013): 102–23. http://dx.doi.org/10.1016/j.cam.2012.12.025.

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25

Demers-Kohls, J. F., S. L. Ouderkirk, J. L. Buckle, W. E. Norman, N. S. Cartwright, and C. Dagenais. "Evaluation of the Dflex® Device for Fire Debris Analysis." Canadian Society of Forensic Science Journal 27, no. 3 (1994): 99–123. http://dx.doi.org/10.1080/00085030.1994.10757030.

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26

Roberts, Marion E., Friederike M. S. Barthel, Carolina Lopez, Kate Tchanturia, and Janet L. Treasure. "Development and validation of the Detail and Flexibility Questionnaire (DFlex) in eating disorders." Eating Behaviors 12, no. 3 (2011): 168–74. http://dx.doi.org/10.1016/j.eatbeh.2011.04.001.

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27

Massey, D., E. Du Pasquier, and C. Lennard. "Solvent Desorption of Charcoal Strips (DFLEX®) in the Analysis of Fire Debris Samples: Replacement of Carbon Disulfide." Canadian Society of Forensic Science Journal 35, no. 4 (2002): 195–207. http://dx.doi.org/10.1080/00085030.2002.10757547.

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28

Marchiol, Fiorenza, Francesca Lionetti, Gian Luigi Luxardi, Corrado Cavallero, Marion Roberts, and Barbara Penolazzi. "Cognitive inflexibility and over‐attention to detail: The Italian validation of the DFlex Questionnaire in patients with eating disorders." European Eating Disorders Review 28, no. 6 (2020): 671–86. http://dx.doi.org/10.1002/erv.2781.

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29

Maria, Anne-Solène, Caroline Barry, Damien Ringuenet, Bruno Falissard, Trecogam Group, and Sylvie Berthoz. "Subjective cognitive rigidity and attention to detail: A cross-cultural validation of the Detail and Flexibility Questionnaire (DFlex) in a French clinical sample." Journal of Clinical and Experimental Neuropsychology 42, no. 10 (2020): 1059–71. http://dx.doi.org/10.1080/13803395.2020.1842333.

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30

Siva Subramanian, A. P., B. S. Sutha, and K. R. Aravind Britto. "Cohesive DS-PID and FQL Control Mechanisms to Enhance the Performance of the Electric Vehicle System." Elektronika ir Elektrotechnika 28, no. 2 (2022): 46–58. http://dx.doi.org/10.5755/j02.eie.30492.

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Electric Vehicles (EVs) have become more popular and attractive in recent days, due to their benefits of zero carbon emissions, cost effectiveness, reduced maintenance, and effectiveness. In which, controlling the speed of motor and proper power regulation are the important tasks for designing the EV systems. For this purpose, various control techniques have been developed in the existing works, but it limits with the major problems of reduced efficiency, increased error output, and high time consumption. To solve these problems, this paper intends to develop an advanced and novel optimization

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31

Toropov, E. I., Yu P. Trusov, A. S. Vashurin, and P. S. Moshkov. "ESTIMATION OF THE ACCURACY OF FUEL CONSUMPTION MEASUREMENT BASED ON DATA FROM THE ON-BOARD CAN-BUS." Spravochnik. Inzhenernyi zhurnal, no. 297 (December 2021): 32–38. http://dx.doi.org/10.14489/hb.2021.12.pp.032-038.

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Determining the dependence of actual fuel consumption on operating conditions is the most important task in vehicle transport, since the cost of hydrocarbons is a significant part of the cost of transportation. Currently, there are many ways to experimentally measure fuel efficiency: using external flow meters installed in the fuel line, equipping the tank with additional level sensors, using information from the electronic engine control unit. The latter approach is of greatest interest, since it requires minimal financial investment, is easy to install, and there are no significant changes t

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Cordel, Jan, Ruediger Anlauf, Wolfgang Prämaßing, and Gabriele Broll. "Predicting Water Distribution and Optimizing Irrigation Management in Turfgrass Rootzones Using HYDRUS-2D." Hydrology 12, no. 3 (2025): 53. https://doi.org/10.3390/hydrology12030053.

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The increasing global reliance on water resources has necessitated improvements in turfgrass irrigation efficiency. This study aimed to compare measured field data with predicted data on irrigation water distribution in turfgrass rootzones to verify and enhance the accuracy of the HYDRUS-2D simulation model. Data were collected under controlled greenhouse conditions across unvegetated plots with two- and three-layered rootzone construction methods, each receiving 10 mm of water (intensity of 10 mm h−1) via subsurface drip irrigation (SDI) or a sprinkler (SPR). The water content was monitored a

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Nakhodchi, Soheil, Ali Shokuhfar, Saleh Akbari Iraj, and Brian G. Thomas. "Evolution of Temperature Distribution and Microstructure in Multipass Welded AISI 321 Stainless Steel Plates With Different Thicknesses." Journal of Pressure Vessel Technology 137, no. 6 (2015). http://dx.doi.org/10.1115/1.4030367.

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Prediction of temperature distribution, microstructure, and residual stresses generated during the welding process is crucial for the design and assessment of welded structures. In the multipass welding process of parts with different thicknesses, temperature distribution, microstructure, and residual stresses vary during each weld pass and from one part to another. This complicates the welding process and its analysis. In this paper, the evolution of temperature distribution and the microstructure generated during the multipass welding of AISI 321 stainless steel plates were studied numerical

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Abdelhakim, Amine DJENDARA, El amine KHIARI Mohamed, BENZAAMA Abdallah, and BENCHERIF Mohamed. "Study of Heat-Induced and Residual Stress Patterns in Stainless Steel Pipe Welds." February 27, 2025. https://doi.org/10.5281/zenodo.14967753.

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ABSTRACT In This study provides a comprehensive analysis of the impact of welding parameters, specifically welding speed and the number of passes, on the residual stress distribution in AISI 304 (Z7CN18-09) austenitic stainless-steel tubes. A three-dimensional finite element model (FEM) was developed in ABAQUS to simulate the circumferential welding process. The DFLUX and FILM subroutines were employed to represent the double-ellipsoid moving heat source and thermal boundary conditions, respectively. Model validation was achieved by comparing simulated weld bead profiles and thermal cycles wit

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35

Tang, Weifeng, Aoqi Liu, Chengyu Song, and Li Zhou. "Numerical and experimental study of temperature, residual stresses, and microstructural evolution on multi-layer and multi-pass laser cladding of 6061Al alloy." Materials Research Express, September 4, 2024. http://dx.doi.org/10.1088/2053-1591/ad7784.

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Abstract Multi-layer and multi-pass laser cladding is a promising and important process for repairing and strengthening Al alloy parts, whereas the temperature and residual stresses have a great influence on the properties of the laser cladding layer. In this paper, a nonlinear transient thermo-mechanical coupling finite element model of multi-layer and multi-pass cladding of 6061Al alloy was established. Meanwhile, the DFLUX user subroutine was developed using Fortran code to define the movement of the three-dimensional heat source model. From there, the distribution and evolution of temperat

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36

Safikhanlu, Hamed, Amir Mohammad Salehi, and Mehdi Ahmadi Najafabadi. "Ultrasonic and FEM residual stress measurement in dissimilar St37–St52 welding." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, February 10, 2023, 095440622311529. http://dx.doi.org/10.1177/09544062231152990.

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Numerous industries, like the military, the oil and gas industry, etc., rely heavily on dissimilar welding. The welding process leaves the structure with a variety of defects, such as residual stress, that degrade its performance and static and fatigue properties. Consequently, weld residual stress must be accurately measured. In this study, ultrasonic and finite element techniques are developed to assess the residual stress in dissimilar St37/St52 welding. In addition, hole-drilling technique is employed to confirm FEM and ultrasonic data. Probe fixture is designed and built for ultrasonic st

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Wang, Huili, Sifeng Qin, Ben Wang, and Shaobo Zhou. "Welding-induced Residual Stresses in U-Ribs of a Steel Bridge Deck." Periodica Polytechnica Civil Engineering, August 18, 2021. http://dx.doi.org/10.3311/ppci.18112.

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To calculate the welding-induced residual stresses in U-ribs of the steel deck plate and conduct quantitative analysis of influential factors, the U-ribs of steel deck plate of Xinghai Bay Bridge was taken as the research object. In the ABAQUS finite element software, the local models of U-ribs of steel deck plate were established. Nodal body force loads, i.e., heat generation rate, of the double ellipsoidal heat source models were applied via the compiled subsidiary Dflux program. The welding process of the v-groove welds was simulated, to obtain the residual stresses distribution in the top

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Feli, S., M. E. Aalami Aaleagha, M. Foroutan, and E. Borzabadi Farahani. "Finite Element Simulation of Welding Sequences Effect on Residual Stresses in Multipass Butt-Welded Stainless Steel Pipes." Journal of Pressure Vessel Technology 134, no. 1 (2011). http://dx.doi.org/10.1115/1.4004571.

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In this paper, a finite element simulation, based on abaqus software is presented for analyzing the temperature history and the residual stress states in multipass welds in stainless steel pipe. The uncoupled thermal–mechanical a three-dimensional (3D) model and a two-dimensional (2D) model are developed. The volumetric heat source with double ellipsoidal distribution for front and rear heat source, proposed by Goldak and Akhlaghi, has also been used. Furthermore, a moving heat source has been modeled by abaqus subroutine DFLUX. A user subroutine FILM has also been used to simulate the combine

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Han, You Sung, Kyehyung Lee, Myoung-Soo Han, Hyunchil Chang, Kanghyouk Choi, and Seyoung Im. "Finite Element Analysis of Welding Processes by Way of Hypoelasticity-Based Formulation." Journal of Engineering Materials and Technology 133, no. 2 (2011). http://dx.doi.org/10.1115/1.4003099.

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Welding is one of the most important joining processes, and the effect of welding residual stresses in a structure has a great deal of influence on its quality. In spite of such a key interest, the analysis of a welding process has not been successful as in a structural analysis. This is partially because welding involves complex phenomena that are manifested by the phase evolution and by thermomechanical processes as well. In the present study, a hypoelasticity-based formulation is applied to welding processes to determine residual deformation and stresses. Algorithmic consistent moduli for e

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Ge, Chuanjie, Binbin Liao, Lu Ding, Dengwang Wang, Shuai Chen, and Dezhi Zhang. "Thermal response of carbon/phenolic composites under high intensity thermal radiation heating: Experimental and numerical analysis." Polymer Composites, May 7, 2025. https://doi.org/10.1002/pc.30006.

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AbstractIn this paper, the thermal response and pyrolysis mechanism of carbon fiber/phenolic plain composite laminates under the thermal radiation were investigated experimentally and numerically. Thermal radiation was generated through aluminum‐oxygen combustion with higher coverage and heat flux density than conventional heat sources such as paraffin, diesel, and propane, allowing for a more realistic simulation of high‐temperature environments. The specimens exhibited damages such as fiber‐char, matrix decomposition, and delamination after the experiment. Then, the thermal/chemical coupling

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Nair, Tanushree, Hafsa Sirajuddin, Mei Ao, et al. "A Role for p38 in Bile Acid (BA)‐Mediated Tight Junction (TJ) Dysfunction in Human Colon T84 Cells." FASEB Journal 31, S1 (2017). http://dx.doi.org/10.1096/fasebj.31.1_supplement.703.9.

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BA‐associated diarrhea commonly occurs in patients with inflammatory bowel diseases where the epithelial barrier is compromised. We have previously shown in T84 cells that chenodeoxycholic acid (CDCA, 500 μM) caused a time‐dependent increase in p38 phosphorylation, but SB203580 (SB, p38 antagonist, 10μM) had no effect on CDCA‐induced increase in ISC(AJP ′16; 311: C777). We also demonstrated that BAs play a role in the regulation of intestinal barrier function, with CDCA disrupting TJs and lithocholic acid (LCA, 50 μM) reversing these effects (FASEB J 2016 30:1223.29). Furthermore, p38 signalin

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Ghoreishi, S. Reza, and Masoud Mahmoodi. "An optimized irradiation strategy and layout configuration in laser forming of copper/aluminum bi-metal sheets with a functional thickness." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, December 12, 2022, 146442072211434. http://dx.doi.org/10.1177/14644207221143444.

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Laser forming process is a type of thermo-mechanical forming process in which a laser beam irradiation on a specific scan path is used to create a bending angle in a sheet. In this work, the forming behavior of copper/aluminum bi-metal sheets with a functional thickness is investigated using the laser forming process. For that, numerical simulations are performed with an implementation of DFLUX subroutine to have more realistic process circumstances. The process parameters were defined as follows: laser beam radius of 2 mm and scan velocity of 1000 mm/min with three different laser power to ac

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Giles, Sarah, Elizabeth K. Hughes, Matthew Fuller‐Tyszkiewicz, et al. "Validating and developing a shortened version of the detail and flexibility (DFlex) questionnaire for eating disorders, anxiety and depression." European Eating Disorders Review, August 7, 2023. http://dx.doi.org/10.1002/erv.3014.

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AbstractObjectiveTo validate the original and a shortened version of the Detail and Flexibility (DFlex) Questionnaire.MethodConfirmatory factor analyses, internal consistency, and discriminant validity estimates were conducted within individuals with a diagnosis of an eating disorder (ED) (n = 124), an anxiety disorder and/or depression (n = 219), and a community sample (n = 852) (Part 1). Convergent validity of the DFlex through comparisons with the Autism Spectrum Quotient, Wisconsin Card Sorting Task, and Group Embedded Figures Task was undertaken within a combined ED and community sample (

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Elleflot, T., A. Suzuki, K. Arnold, et al. "Low Noise Frequency-Domain Multiplexing of TES Bolometers Using SQUIDs at Sub-Kelvin Temperature." Journal of Low Temperature Physics, October 7, 2022. http://dx.doi.org/10.1007/s10909-022-02796-8.

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AbstractDigital Frequency-Domain Multiplexing (DfMux) is a technique that uses MHz superconducting resonators and Superconducting Quantum Interference Device (SQUID) arrays to read out sets of transition edge sensors. DfMux has been used by several Cosmic Microwave Background experiments, including most recently POLARBEAR-2 and SPT-3 G with multiplexing factors as high as 68, and is the baseline readout technology for the planned satellite mission LiteBIRD. Here, we present recent work focused on improving DfMux readout noise, reducing parasitic impedance, and improving sensor operation. We ha

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Farias, Nicole, Tylor Adkins, Tijmen de Haan, et al. "Understanding the Phase of Responsivity and Noise Sources in Frequency-Domain Multiplexed Readout of Transition Edge Sensor Bolometers." Journal of Low Temperature Physics, May 26, 2024. http://dx.doi.org/10.1007/s10909-024-03143-9.

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AbstractCosmic microwave background (CMB) experiments have deployed focal planes with $$\mathcal {O}(10^{4})$$ O ( 10 4 ) transition edge sensor (TES) bolometers cooled to sub-Kelvin temperatures by multiplexing the readout of many TES channels onto a single pair of wires. Digital Frequency-domain Multiplexing (DfMux) is a multiplexing technique used in many CMB polarization experiments, such as the Simons Array, SPT-3 G, and EBEX. The DfMux system studied here uses LC filters with resonant frequencies ranging from 1.5 to 4.5 MHz connected to an array of TESs. Each detector has an amplitude-mo

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Lištiak, Matúš, Flóra Jozefíková, Jindra Valentová, et al. "Synthesis, characterization and biological studies of novel dinuclear salicylatocopper(II) complexes containing 1,10‐phenanthroline." European Journal of Inorganic Chemistry, May 6, 2025. https://doi.org/10.1002/ejic.202500143.

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The presented study reports the synthesis, structural characterization, and biological evaluation of four novel dinuclear copper(II) complexes with salicylate derivatives, such as 4‐bromsalicylate ((4‐Br‐Sal)2–), 4‐(3‐fluromethyl)salicylate ((4(CF3)‐Sal)2–), 6‐fluorosalicylate ((6‐F‐Sal)2–) and 5‐(2´,4´‐difluorophenyl)‐salicylate/diflunisal (dflu2–) and 1,10‐phenanthroline (phen) as neutral N,N´‐donor ligand: [Cu2(4‐Br‐Sal)2(phen)2] (1), [Cu2(4‐CF3‐Sal)2(phen)2] (2), [Cu2(6‐F‐Sal)2(phen)2] (3), [Cu2(diflu)2(phen)2] (4). The complexes were structurally confirmed via X‐ray crystallography, revea

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van Passel, Boris, Unna N. Danner, Alexandra E. Dingemans, et al. "Remediating cognitive inflexibility in obsessive compulsive disorder and anorexia nervosa neither moderates nor mediates treatment effects: an exploratory study." Frontiers in Psychiatry 15 (January 13, 2025). https://doi.org/10.3389/fpsyt.2024.1456890.

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ObjectiveObsessive compulsive disorder (OCD) and anorexia nervosa (AN) are conditions associated with poor cognitive flexibility, a factor considered to interfere with treatment, but research into the relationship between cognitive flexibility and treatment outcome is limited. This study explores whether baseline measures of cognitive flexibility predict outcomes in OCD and AN, evaluates whether changes in these measures contribute to treatment outcome, and evaluates the effectiveness of adjunctive cognitive remediation therapy (CRT) in improving cognitive flexibility.MethodsThis secondary ana

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Sternheim, Lot Catharina, Boris van Passel, Alexandra Dingemans, Danielle Cath, and Unna Nora Danner. "Cognitive and Experienced Flexibility in Patients With Anorexia Nervosa and Obsessive Compulsive Disorder." Frontiers in Psychiatry 13 (May 9, 2022). http://dx.doi.org/10.3389/fpsyt.2022.868921.

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ObjectiveAnorexia nervosa (AN) and obsessive-compulsive disorder (OCD) share a neuropsychological profile characterized by cognitive inflexibility as evident in set-shifting problems, and by strong detail focus. Clinically, both patient groups display a strong rigidity which may be explained by these neurocognitive difficulties. Cognitive inflexibility may hinder treatment uptake and help explain suboptimal treatment outcomes in both AN and OCD. This is the first study to compare clinical AN and OCD groups andto examine similarities and differences in cognitive flexibility. Specifically, this

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