Elevated Temperature Elastic-Plastic-Creep Test of an Elbow Subjected to In-Plane Moment Loading

1977 ◽  
Vol 99 (2) ◽  
pp. 291-297 ◽  
Author(s):  
A. Imazu ◽  
R. Miura ◽  
K. Nakumura ◽  
T. Nagata ◽  
K. Okabayashi
Keyword(s):  
Creep Behavior ◽  
304 Stainless Steel ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Curved Pipes ◽  
Theoretical Predictions ◽  
Stationary Creep ◽  
Type 304 ◽  
Type 304 Stainless Steel ◽  
Plastic Creep

This paper describes the results of test on elastic-plastic-creep behavior of a 12-in. Sch. 20 type 304 stainless steel elbow-pipe assembly subjected to in-plane moment loading at 600°C (1112°F). During the test, loads at seven different levels were applied to the specimen. In each stage of the test, the load, deflection, strains at specific locations, and ovalization of the cross section were measured. The results were compared with Spence’s theoretical predictions on the stationary creep behavior of smooth curved pipes and the inelastic solutions obtained by the MARC finite element analysis program.

Visualization of Thermal Fatigue Damage Distribution With Elastic-Plastic FEA

2018 ◽  
Author(s):  
Junya Miura ◽  
Terutaka Fujioka ◽  
Yasuhiro Shindo
Keyword(s):  
Fatigue Damage ◽  
Thermal Fatigue ◽  
Thermal Loading ◽  
304 Stainless Steel ◽  
Element Analysis ◽  
Steel Cylinder ◽  
Elastic Plastic ◽  
Calculation Results ◽  
Type 304 ◽  
Cae System

This paper proposes simplified methods to evaluate fatigue damage in a component subjected to cyclic thermal loading, in order to visualize the distribution of usage factor using a graphical user interface (GUI) incorporated in a widely-used commercial CAE. The objective is to perform the evaluation and visualization using a standard desktop PC. In the previous paper, three simplified methods based on elastic finite-element analysis (FEA) were proposed in place of the method in the procedures employed in ASME Section III Subsection NH. In this paper, the methods have been improved for elastic-plastic FEA. A previously performed thermal fatigue test with a type 304 stainless steel cylinder was simulated. Heat transfer, elastic, and inelastic analyses were conducted. Simultaneously with the analyses performed, the equivalent total strain ranges and fatigue usage factor distributions were calculated using user subroutines developed in this study including three newly proposed simplified and ASME NH-based methods. These distributions can be visualized on a GUI incorporated in a commercial FEA code. The calculation results were consistent with the distribution of cracks observed. In addition, by using these, the analysts can visualize these distributions using their familiar CAE system.

Experimental Evaluation of Creep Constitutive Equations for Type 304 Stainless Steel Under Non-Steady Multiaxial States of Stress

1986 ◽  
Vol 108 (2) ◽  
pp. 119-126 ◽  
Author(s):  
S. Murakami ◽  
N. Ohno ◽  
H. Tagami
Keyword(s):  
Stainless Steel ◽  
Creep Behavior ◽  
Stress Change ◽  
304 Stainless Steel ◽  
Test Time ◽  
Surface Model ◽  
Creep Tests ◽  
Type 304 ◽  
Type 304 Stainless Steel ◽  
Multiaxial Loadings

In order to evaluate the validity and limitations of the creep-hardening surface model proposed by the present authors, a series of creep tests for type 304 stainless steel were performed at 600°C under various non-steady multiaxial loadings. The test time and the interval of stress change were 960 hr and 48 or 96 hr, respectively, and five kinds of stress histories consisting of randomly varying stress magnitude, stress direction and interval of stress change were employed. It was found that the creep-hardening surface model describes sufficiently well the creep behavior observed in this work.

Visualization of Thermal Fatigue Damage Distribution With Simplified Stress Range Calculations

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Junya Miura ◽  
Terutaka Fujioka ◽  
Yasuhiro Shindo
Keyword(s):  
Fatigue Damage ◽  
Thermal Fatigue ◽  
Elastic Stress ◽  
Computation Time ◽  
304 Stainless Steel ◽  
Engineering Systems ◽  
Damage Distribution ◽  
Element Analysis ◽  
Type 304 ◽  
Type 304 Stainless Steel

This paper proposes simplified methods to evaluate fatigue damage in a component subjected to cyclic thermal loads to visualize damage distribution by using typical computer-aided engineering systems. The objective is to perform the evaluations on a standard desktop PC within a reasonably short computation time. Three simplified methods for defining elastic stress ranges are proposed in place of the method in the ASME Subsection NH procedures. A thermal fatigue test that was previously performed using a type-304 stainless steel (304SS) cylinder is simulated to validate the proposed methods. Heat transfer and elastic analyses are conducted. Simultaneously with the analyses, fatigue usage factors are calculated using user subroutines formulated in this study, including the three simplified methods and the ASME NH-based method. The calculated values of the fatigue usage factor are visualized using a graphical user interface (GUI) incorporated into a commercial finite-element analysis (FEA) code. The fatigue usage factor distribution obtained using the simplified methods could be calculated without requiring large amounts of memory and long computation time. In addition, the distribution of the fatigue usage factor was consistent with the distribution of cracks observed in the test.

Comparison of Experimental and Simplified Analytical Results for the In-Plane Plastic Bending and Buckling of an Elbow

1980 ◽  
Vol 102 (4) ◽  
pp. 400-409 ◽  
Author(s):  
L. H. Sobel ◽  
S. Z. Newman
Keyword(s):  
Strain Curve ◽  
Experimental Results ◽  
304 Stainless Steel ◽  
Stress Strain Curve ◽  
Element Analysis ◽  
Pipe Bend ◽  
Plane Plastic ◽  
Type 304 ◽  
Type 304 Stainless Steel ◽  
Good Agreement

Predictions obtained from a simplified finite element analysis are compared with experimental results on the plastic in-plane bending and buckling of a 16-in-dia Type 304 stainless steel piping structure which consists of a 90-deg elbow and two straight tangent pipes. The large displacement analysis is based on the widely used MARC pipe-bend element 17, and on a stress-strain curve obtained from coupon specimens taken from the tested elbow. The simplified analysis predictions are found to be in reasonably good agreement with the experimental results. The analysis underestimates the experimental buckling load by 10 percent and overestimates the deformation at a given load, particularly at the higher load levels.

OUTOKUMPU TYPE 630

Alloy Digest ◽  
2016 ◽  
Vol 65 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
High Performance ◽  
High Strength ◽  
Heat Treating ◽  
304 Stainless Steel ◽  
Type 304 ◽  
Type 304 Stainless Steel

Abstract Outokumpu Type 630 is a martensitic age hardenable alloy of composition 17Cr-4Ni. The alloy has high strength and corrosion resistance similar to that of Type 304 stainless steel. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-1238. Producer or source: Outokumpu High Performance Stainless.

Passivity of Type 304 Stainless Steel–Effect of Plastic Deformation

CORROSION ◽  
1972 ◽  
Vol 28 (7) ◽  
pp. 269-273 ◽  
Author(s):  
K. Elayaperumal ◽  
P. K. De ◽  
J. Balachandra
Keyword(s):  
Plastic Deformation ◽  
Stainless Steel ◽  
304 Stainless Steel ◽  
Type 304 ◽  
Type 304 Stainless Steel
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