scholarly journals Proposal of residual stress mitigation in nuclear safety-related austenitic stainless steel TP304 pipe bended by local induction heating process via elastic-plastic finite element analysis

2019 ◽  
Vol 51 (5) ◽  
pp. 1451-1469 ◽  
Author(s):  
Jong-Sung Kim ◽  
Kyoung-Soo Kim ◽  
Young-Jin Oh ◽  
Chang-Young Oh
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Induction Heating ◽  
Nuclear Safety ◽  
Heating Process ◽  
Element Analysis ◽  
Elastic Plastic

Block Shear Behaviors of Angle Two-Bolted Connections with Austenitic Stainless Steel – Experiment and Finite Element Analysis

2013 ◽  
Vol 658 ◽  
pp. 350-353
Author(s):  
Tae Soo Kim ◽  
Min Seung Kim ◽  
Sung Woo Shin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Ultimate Strength ◽  
Strength Reduction ◽  
Test Results ◽  
Bolted Connections ◽  
Element Analysis ◽  
Block Shear

Since stainless steel has significant characteristics such as its superior corrosion resistance, durability, aesthetic appeal etc., it has been utilized as structural members in buildings. Recently, ultimate behaviors and curling influence in austenitic stainless steel single shear bolted connections with thin-walled plane plates have been investigated by T.S. Kim. In this paper, finite element analysis (FEA) has been conducted based on the existing test results of angle bolted connections in fabricated with austenitic stainless steel. The validation of the numerical analysis prediction was verified through the comparison of test results for fracture mode, ultimate strength and curling occurrence. Curling (out-of- plane deformation) also observed in the connections with a long end distance. The curling caused the ultimate strength reduction and the ultimate strength reduction ratios (varied from 12% to 25%) caused by curling have been estimated quantitatively through the comparison of FEA results of FE models with free edge and restrained curling.

scholarly journals Finite Element Analysis on the Temperature- Dependent Burst Behavior of Domed 316L Austenitic Stainless Steel Rupture Disc

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 232
Author(s):  
Hongbo Zhu ◽  
Weipu Xu ◽  
Zhiping Luo ◽  
Hongxing Zheng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Burst Pressure ◽  
Temperature Dependent ◽  
Element Analysis ◽  
Rupture Disc ◽  
316L Austenitic Stainless Steel ◽  
Increasing Temperature

As a safety device, a rupture disc instantly bursts as a nonreclosing pressure relief component to minimize the explosion risk once the internal pressure of vessels or pipes exceeds a critical level. In this study, the influence of temperature on the ultimate burst pressure of domed rupture discs made of 316L austenitic stainless steel was experimentally investigated and assessed with finite element analysis. Experimental results showed that the ultimate burst pressure gradually reduced from 6.88 MPa to 5.24 MPa with increasing temperature from 300 K to 573 K, which are consistent with the predicted instability pressures acquired by nonlinear buckling analysis using ABAQUS software. Additionally, it was found that a gradual transition from opening ductile mode to cleavage mode happened with increasing temperature due to more cross slips occurring under serious plastic deformation. The equivalent stress, equivalent strain and strain hardening rates acquired by static analysis were effective at rationalizing the temperature-dependent fracture behavior of the domed rupture discs.

Finite Element Analysis and Mechanical Behavior of 316L Stainless Steel Processed by Room Temperature Rolling

2019 ◽  
Vol 969 ◽  
pp. 508-516 ◽  
Author(s):  
Rahul Singh ◽  
Surya Deo Yadav ◽  
Nikhil Malviya ◽  
Sunkulp Goel ◽  
R. Jayaganthan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Room Temperature ◽  
Magnetic Measurements ◽  
Solution Treatment ◽  
Element Analysis ◽  
Room Temperature Rolling

The present work deals with plastic deformation of 316L austenitic stainless steel (ASS) using room temperature rolling process. After solution treatment (annealing) as-received 316L ASS has been rolled for up to 90% of thickness reduction. To investigate the effect of processing on mechanical properties microstructural study, tensile and hardness tests have been conducted. The ultimate tensile strength has been improved from 767 MPa (before deformation) to 1420 MPa (after 90% deformation), and hardness value has been increased from 208 VHN (before deformation) to 449 VHN (after 90% reduction). Magnetic measurements and XRD characterization have been performed to confirm the formation of martensitic phase. Finite element analysis have also been simulated employing DEFORM-3D software to get the insight about deformation behavior. Keywords: Room temperature rolling, Finite Element Analysis, Mechanical properties, Austenitic stainless steel.

Finite Element Modelling of Welded Austenitic Stainless Steel Plate With 8-Passes

2014 ◽  
Author(s):  
V. I. Patel ◽  
O. Muránsky ◽  
C. J. Hamelin ◽  
M. D. Olson ◽  
M. R. Hill ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Heat Source ◽  
Steel Plate ◽  
Contour Method ◽  
Thermal Loads ◽  
Stainless Steel Plate ◽  
Element Analysis

The current paper presents a finite element analysis of an eight-pass groove weld in a 316L austenitic stainless steel plate. A dedicated welding heat source modelling tool was employed to produce volumetric body power density data for each weld pass, thus simulating weld-induced thermal loads. Thermocouple measurements and cross-weld macrographs taken from a weld specimen were used for heat source calibration. A mechanical finite element analysis was then conducted, using the calibrated thermal loads and a Lemaitre-Chaboche mixed work-hardening model. The predicted post-weld residual stresses were validated using contour method measurements: good agreement between measured and simulated residual stress fields was observed. A sensitivity analysis was also conducted to identify the boundary conditions that best represent a tack-welded I-beam support, which was present on the specimen back-face during the welding.

Finite Element Analysis of the Effect of Brazed Residual Stress on Creep for Stainless Steel Plate-Fin Structure

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
Wen-Chun Jiang ◽  
Jian-Ming Gong ◽  
Hu Chen ◽  
S. T. Tu
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Stress Distribution ◽  
Steel Plate ◽  
Operating Pressure ◽  
Stainless Steel Plate ◽  
Element Analysis ◽  
Creep Analysis

This paper presented a finite element analysis of the effect of brazed residual stress on creep for stainless steel plate-fin structure using finite element code ABAQUS. The as-brazed residual stress distribution generated during the brazing process was obtained. Two cases, which are denoted Cases 1 and 2, were analyzed and compared to discuss the effect of as-brazed residual stress on creep. Case 1 was to carry out creep analysis just at the internal operating pressure. Case 2 was to perform the creep analysis considering the internal operating pressure in conjunction with as-brazed residual stress. The results show that due to the mechanical property mismatch between filler metal and base metal, large residual stress is generated in the brazed joint, which has a great influence on creep for stainless steel plate-fin structure. The creep strain and stress distribution of the overall plate-fin structure is obtained. The position that is most likely to fail is the fillet for the plate-fin structure at high temperature. Especially in the fillet interface, the creep strain and stress distribution are discontinuous and uncoordinated, which have great effect on creep failure.

Finite Element Analysis of Residual Stresses in Butt Welding of Stainless Steel Plates by GTAW

2010 ◽  
Author(s):  
Gurinder Singh Brar ◽  
Rakesh Kumar
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Residual Stresses ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Element Analysis ◽  
Aisi 304 ◽  
Butt Welding

Welding is one of the most commonly used permanent joining processes in the piping and pressure vessel industry. During welding a very complex thermal cycle is applied to the weldment, which in turn causes irreversible elastic-plastic deformation and consequently gives rise to the residual stresses in and around fusion zone and heat affected zone (HAZ). Presence of residual stresses may be beneficial or harmful for the structural components depending on the nature and magnitude of stresses. The beneficial effect of compressive stresses have been widely used in industry as these are believed to increase fatigue strength of the component and reduce stress corrosion cracking and brittle fracture. In large steel fabrication industries such as shipbuilding, marine structures, aero-space industry, high speed train guide ways and pressure vessels and piping in chemical and petrochemical industry the problem of residual stresses and overall distortion has been and continue to be a major issue. It is well established fact that material response of structural components is substantially affected by the residual stresses when subjected to thermal and structural loads. Due to these residual stresses produced in and around the weld zone the strength and life of the component is reduced. As AISI 304 stainless steel has excellent properties like better corrosion resistance, high ductility, excellent drawing, forming and spinning properties, so it is almost used in all types of application like chemical equipment, flatware utensils, coal hopper, kitchen sinks, marine equipment etc. But because of the problems of residual stresses during the time of welding it is very essential to understand the behavior and nature of AISI 304 stainless steel material. So in order to overcome all these problems a 3-dimensional finite element model is developed in a commercially available FEA code by drafting an approximate geometry of the butt welded joint and then the finite element analysis is performed, so that one can understand the complete nature of residual stresses in butt welding of AISI 304 stainless steel plate. In this paper, butt welding simulations were performed on two AISI 304 stainless steel plates by gas tungsten arc welding (GTAW). Analysis of butt welded joint by commercially available finite element analysis code showed that butt weld produced by GTAW resulted in 782.84 MPa of residual stress in plates. In addition, the residual stress is plotted against axial distance to have a clear picture of the magnitude of residual stress in and around weld area.

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