Role of Steel Plate Thickness on the Residual Stress Formation and Cracking Behavior During Flame Cutting

The grinding process is often maligned by grinding burn; which refers to many unwanted effects, including residual stress formation. This paper presents an overview of the role of grinding wheel technologies in the surface response and residual stress formation of thin section Inconel 718. Using production standard equipment, conventional abrasive vitrified, and super abrasive electroplated wheel technologies were evaluated in initial comparative trials. Results revealed the dominant residual stress profiles, which manifested as measurable distortion and the thermo-mechanical impact of grinding, such as softening. Following this, a parametric study was carried out using cubic boron nitride super abrasive electroplated wheels to investigate the interaction of grinding parameters on the generated output. It was shown that at increased grinding aggressions, tensile stress regimes increased resulting in increased distortion magnitudes. The study highlights the importance of assessing residual stress formation when manipulating both wheel technologies and grinding parameters. It is envisaged that with additional assessment, a route to an engineered residual stress profile might be achieved.

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The Effect of Hardness on Residual Stresses in Orthogonal Machining of AISI 4340 Steel

Journal of Engineering for Industry ◽

10.1115/1.2899582 ◽

1990 ◽

Vol 112 (3) ◽

pp. 245-252 ◽

Cited By ~ 79

Author(s):

D. W. Wu ◽

Y. Matsumoto

Keyword(s):

Residual Stress ◽

Metal Cutting ◽

Stress Pattern ◽

Satisfactory Explanation ◽

Orthogonal Machining ◽

Material Hardness ◽

Machined Parts ◽

Stress Formation ◽

Measurable Factors

Residual stress remaining in machined parts can be detrimental. Previous experimental evidence shows that hardness has a significant effect on its formation. Yet, no satisfactory explanation is available for the causes of such a phenomenon. This work seeks to understand the mechanism of residual stress formation and explain the effect of hardness on it. The analysis is based on the existence of several measurable factors that influence the stress field in the work-material during the cutting process. The sensitivity of these factors to hardness allows establishment of relationships between the hardness and the material loading cycle. The results of the analysis indicate that the residual stress pattern is correlated most strongly to the orientation of the primary deformation zone in metal cutting. This correlation provides a good explanation for the role of the material hardness on the residual stress formation.

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High-Frequency Inducting Plate Bending Forming with Gravity on Different Thickness Ship Plate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.510.406 ◽

2012 ◽

Vol 510 ◽

pp. 406-411

Author(s):

Ji Xiang Zhang ◽

Guo Yin An ◽

Zheng Jun Li ◽

Zhi Xiang Wang

Keyword(s):

Residual Stress ◽

High Frequency ◽

Heating Temperature ◽

Plate Thickness ◽

Fem Model ◽

Bending Angle ◽

The Given ◽

Temperature Heating ◽

Different Thickness

In this article, a FEM model of high-frequency induction bending with gravity is established and with which the heated temperature, stress, deformation, residual stress and bending angle after cooling, etc are studied on different thickness ship plate. The results show that the steel plate can be heated to 860 above the austenitic temperature. Heating temperature is gradually decreased as the thickness increase, while there is a fluctuation in the late. As the plate thickness increases, in mm, the bending angle of the plate gradually decreases, and gradually increases in 8mm14mm, and then decreases in the late. Under the given heating conditions, thin plate and the mm thick plate have the best result of deformation. The stress in heat area reaches to the yield stress of Q345, and promotes plastic deformation due to the role of heating temperature gradient and gravity. When the plate has cooled, the residual stress is mainly concentrated at the bottom of the coil.

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Role of tool rotational speed in influencing microstructural evolution, residual-stress formation and tensile properties of friction-stir welded AZ80A Mg alloy

Materiali in tehnologije ◽

10.17222/mit.2017.213 ◽

2018 ◽

Vol 52 (5) ◽

pp. 607-614 ◽

Cited By ~ 2

Author(s):

P. Sevvel ◽

C. Satheesh

Keyword(s):

Residual Stress ◽

Tensile Properties ◽

Microstructural Evolution ◽

Rotational Speed ◽

Mg Alloy ◽

Tool Rotational Speed ◽

Friction Stir ◽

Stress Formation ◽

Az80a Mg Alloy

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S136 Operational Residual Stress Formation in Vibration-Loaded Rolling Contact

Powder Diffraction ◽

10.1154/1.2951858 ◽

2008 ◽

Vol 23 (2) ◽

pp. 190-190 ◽

Cited By ~ 2

Author(s):

J. Gegner ◽

W. Nierlich

Keyword(s):

Residual Stress ◽

Rolling Contact ◽

Stress Formation

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Influence of Heat Treatment on Residual Stress Formation in the Wear-Resistant Steel 60–Steel 15–Steel 60 Bimetal Material

Inorganic Materials Applied Research ◽

10.1134/s2075113321010378 ◽

2021 ◽

Vol 12 (1) ◽

pp. 5-9

Author(s):

N. N. Sergeev ◽

A. N. Sergeev ◽

S. N. Kutepov ◽

A. E. Gvozdev ◽

A. G. Kolmakov ◽

...

Keyword(s):

Heat Treatment ◽

Residual Stress ◽

Resistant Steel ◽

Wear Resistant ◽

Stress Formation

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Flexural bearing capacity of RC hollow slab beam strengthened by steel plates of different thicknesses

International Journal of Structural Integrity ◽

10.1108/ijsi-04-2021-0041 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Long Liu ◽

Lifeng Wang ◽

Ziwang Xiao

Keyword(s):

Finite Element ◽

Bearing Capacity ◽

Steel Plate ◽

Plate Thickness ◽

Research Field ◽

Steel Plates ◽

Nonlinear Material ◽

Finite Element Models ◽

Content Type ◽

Flexural Bearing Capacity

PurposeThe flexural reinforcement of bridges in-service has been an important research field for a long time. Anchoring steel plate at the bottom of beam is a simple and effective method to improve its bearing capacity. The purpose of this paper is to explore the influence of anchoring steel plates of different thicknesses on the bearing capacity of hollow slab beam and to judge its working status.Design/methodology/approachFirst, static load experiments are carried out on two in-service RC hollow slab beams; meanwhile, nonlinear finite element models are built to study the bearing capacity of them. The nonlinear material and shear slip effect of studs are considered in the models. Second, the finite element models are verified, and the numerical simulation results are in good agreement with the experimental results. Finally, the finite element models are adopted to carry out the research on the influence of different steel plate thicknesses on the flexural bearing capacity and ductility.FindingsWhen steel plates of different thicknesses are adopted to reinforce RC hollow slab beams, the bearing capacity increases with the increase of the steel plate thickness in a certain range. But when the steel plate thickness reaches a certain level, bearing capacity is no longer influenced. The displacement ductility coefficient decreases with the increase of steel plate thickness.Originality/valueBased on experimental study, this paper makes an extrapolation analysis of the bearing capacity of hollow slab beams reinforced with steel plates of different thicknesses through finite element simulation and discusses the influence on ductility. This method not only ensures the accuracy of bearing capacity evaluation but also does not need many samples, which is economical to a certain extent. The research results provide a basis for the reinforcement design of similar bridges.

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Computational predictions for predicting the performance of steel 1 panel shear wall under explosive loads

Engineering Computations ◽

10.1108/ec-09-2020-0492 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Aydin Shishegaran ◽

Behnam Karami ◽

Elham Safari Danalou ◽

Hesam Varaee ◽

Timon Rabczuk

Keyword(s):

Steel Plate ◽

Plate Thickness ◽

Ensemble Model ◽

Maximum Deflection ◽

Explosive Load ◽

Statistical Parameters ◽

Content Type ◽

A Value ◽

Error Terms ◽

Better Than

Purpose The resistance of steel plate shear walls (SPSW) under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the conventional weapons effect program (CONWEP) model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a multiple linear regression (MLR), multiple Ln equation regression (MLnER), gene expression programming (GEP), adaptive network-based fuzzy inference (ANFIS) and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads. Design/methodology/approach The SPSW under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the CONWEP model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a MLR, MLnER, GEP, ANFIS and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads. Findings The resistance of SPSW under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the CONWEP model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a MLR, MLnER, GEP, ANFIS and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads. Originality/value The resistance of SPSW under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the CONWEP model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a MLR, MLnER, GEP, ANFIS and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads.

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Comparison of flexural capacity of different hollow slab beams with/without pavement layer reinforced by steel plates

Multidiscipline Modeling in Materials and Structures ◽

10.1108/mmms-07-2021-0134 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Long Liu ◽

Lifeng Wang ◽

Ziwang Xiao

Keyword(s):

Finite Element ◽

Bearing Capacity ◽

Steel Plate ◽

Plate Thickness ◽

Experimental Results ◽

Nonlinear Material ◽

Finite Element Models ◽

Rc Beams ◽

Flexural Capacity ◽

Content Type

PurposeReinforcement of reinforced concrete (RC) beams in-service have always been an important research field, anchoring steel plate in the bottom of the beams is a kind of common reinforcement methods. In actual engineering, the contribution of pavement layer to the bearing capacity of RC beams is often ignored, which underestimates the bearing capacity and stiffness of RC beams to a certain extent. The purpose of this paper is to study the effect of pavement layer on the RC beams before and after reinforcement.Design/methodology/approachFirst, static load experiments are carried out on three in-service RC hollow slab beams, meanwhile, nonlinear finite element models are built to study the bearing capacity of them. The nonlinear material and shear slip effect of studs are considered in the models. Second, the finite element models are verified, and the numerical simulation results are in good agreement with the experimental results. Last, the finite element models are adopted to carry out the research on the influence of different steel plate thicknesses on the flexural bearing capacity and ductility.FindingsThe experimental results showed that pavement layers increase the flexural capacity of hollow slab beams by 16.7%, and contribute to increasing stiffness. Ductility ratio of SPRCB3 and PRCB2 was 30% and 24% lower than that of RCB1, respectively. The results showed that when the steel plate thickness was 1 mm–6 mm, the bearing capacity of the hollow slab beam increased gradually from 2158.0 kN.m to 2656.6 kN.m. As the steel plate thickness continuously increased to 8 mm, the ultimate bearing capacity increased to 2681.0 kN.m. The increased thickness did not cause difference to the bearing capacity, because of concrete crushing at the upper edge.Originality/valueIn this paper, based on the experimental study, the bearing capacity of hollow beam strengthened by steel plate with different thickness is extrapolated by finite element simulation, and its influence on ductility is discussed. This method not only guarantees the accuracy of the bearing capacity evaluation, but also does not require a large number of samples, and has certain economy. The research results provide a basis for the reinforcement design of similar bridges.

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