Full Life Elastic-Plastic-Creep Analysis and Comparison to Tests of Axially Cycled Pressurized Tubular Specimens

1982 ◽  
Vol 104 (2) ◽  
pp. 96-101
Author(s):  
I. Berman ◽  
M. S. M. Rao ◽  
G. D. Gupta
Keyword(s):  
Material Properties ◽  
Fatigue Behavior ◽  
Test Results ◽  
Elastic Plastic ◽  
Creep Analysis ◽  
Creep Fatigue ◽  
Incoloy 800 ◽  
Full Life ◽  
Tubular Specimens ◽  
Plastic Creep

Full life elastic-plastic-creep analyses of axially cycled pressurized tubular 316H stainless steel and Incoloy 800 specimens were run in order to evaluate creep ratcheting and creep fatigue behavior. Analytical results were obtained for the loading conditions and the 593°C (1100°F) material properties of the tests reported by Majumdar [1]. Both “book” value and other material property assumptions were used in the analyses and compared with the test results. Some conclusions from these tests are that book property analyses can, in some cases, underestimate the results. Modification of the material properties to more closely mirror actual conditions can, in some cases, greatly improve the predictions.

Biaxial Cyclic Deformation and Creep-Fatigue Behavior of Materials for Solar Thermal Systems

1982 ◽  
Vol 104 (2) ◽  
pp. 88-95 ◽  
Author(s):  
S. Majumdar
Keyword(s):  
Stainless Steel ◽  
Internal Pressure ◽  
Cyclic Deformation ◽  
Fatigue Behavior ◽  
Axial Stress ◽  
Thermal Systems ◽  
Creep Fatigue ◽  
Incoloy 800 ◽  
The Difference ◽  
Tubular Specimens

Biaxial cyclic deformation and creep-fatigue data for Incoloy 800 and Type 316H stainless steel at elevated temperature are presented. Tubular specimens were subjected to constant internal pressure and strain-controlled axial cycling with and without hold times in tension as well as in compression. The results show that the internal pressure affects diametral ratchetting and axial stress range significantly. However, the effect of a relatively small and steady hoop stress on the cyclic life of the materials is minimal. A 1-min compressive hold per cycle does not seriously reduce the fatigue life of either material; a tensile hold of equal duration causes a significant reduction in life for Type 316H stainless steel, but none for Incoloy 800. Fracture surfaces of specimens made of both materials were studied by scanning electron microscopy to determine the reason for the difference in behavior.

Simplified, Detailed, and Isochronous Analysis and Test Results for the In-Plane Elastic-Plastic and Creep Behavior of an Elbow

1986 ◽  
Vol 108 (3) ◽  
pp. 297-304 ◽  
Author(s):  
L. H. Sobel ◽  
S. Z. Newman
Keyword(s):  
Creep Behavior ◽  
Bending Moment ◽  
Time Dependent ◽  
304 Stainless Steel ◽  
Plastic Behavior ◽  
Test Results ◽  
Creep Properties ◽  
Elastic Plastic ◽  
Creep Analysis ◽  
Simplified Analysis

Predictions obtained from simplified and detailed MARC analyses are compared with experimental results for the elastic-plastic and creep behavior of a 16-in-dia 304 stainless steel piping structure subjected to an in-plane closing bending moment. The piping structure is composed of a 90-deg elbow and two straight tangent pipes. The simplified analysis is found to considerably overestimate the measured results, especially for the case of creep behavior. The correlation of detailed analysis predictions with measured results is satisfactory for the elastic-plastic behavior of the structure, and inconclusive for the creep behavior, since the creep predictions are based on a commonly used creep law rather than on the actual (but unmeasured) creep properties. The paper also shows that predictions of creep deformation obtained from the relatively inexpensive time-independent isochronous method of analysis agree well with results given by a “complete” and more costly time-dependent creep analysis.

Elastic-plastic creep analysis of high temperature nuclear reactor components

1974 ◽  
Vol 28 (3) ◽  
pp. 414-445 ◽  
Author(s):  
Z. Zudans ◽  
M.M. Reddi ◽  
H.M. Fishman ◽  
H.C. Tsai
Keyword(s):  
High Temperature ◽  
Nuclear Reactor ◽  
Elastic Plastic ◽  
Creep Analysis ◽  
Plastic Creep

Optimization of Copper Column Flip Chip Packages Incorporating a Variable Interconnect Compliance Configuration

2007 ◽  
Author(s):  
Andrew A. O. Tay ◽  
Siow Ling Ho
Keyword(s):  
Fatigue Life ◽  
Flip Chip ◽  
Solder Joints ◽  
Wafer Level ◽  
Elastic Plastic ◽  
Creep Analysis ◽  
Reliability Of Solder Joints ◽  
The Impact ◽  
Plastic Creep ◽  
Copper Column

This paper describes a parametric study of the reliability of solder joints in wafer level flip chip packages that employ copper column interconnects. In this study, the impact of the change in the compliance of the copper column interconnects on the fatigue life of the solder joints were investigated by varying the diameter of the copper column interconnects. 2-D elastic-plastic finite element analyses were carried out on packages with constant interconnect diameter as well as those with variable interconnect diameters within the same package. The effect of changing the pitch and the pad size were also studied. It was found that an effective strategy in increasing the fatigue life and hence the reliability of the solder joints is by distributing copper columns of lower compliance (greater diameter) near the center of the package and increasing the compliance of the copper columns (decreasing their diameter) towards the perimeter of the chip package. In addition, elastic-plastic-creep analysis was also performed on the packages. It was observed that the results from the elastic-plastic analysis and the elastic-plastic-creep analysis exhibit the same trend.

416 Elastic-Plastic-Creep Analysis of Sn-3.0Ag-0.5Cu Solder Joints

2007 ◽  
Vol 2007.44 (0) ◽  
pp. 161-162
Author(s):  
Yasuhiro EJIRI ◽  
Hiroshi MINAMI ◽  
Toshihiko SAYAMA ◽  
Takeshi TAKAYANAGI ◽  
Yoshiyuki OKAMOTO ◽  
...  
Keyword(s):  
Solder Joints ◽  
Elastic Plastic ◽  
Creep Analysis ◽  
Plastic Creep

scholarly journals Improvement of Life and NOx Emission of Radiant Tube Heating System by Elastic-Plastic Creep Analysis.

1999 ◽  
Vol 25 (3) ◽  
pp. 435-442 ◽  
Author(s):  
TSUGUHIKO NAKAGAWA ◽  
KUNIHIRO NUTA ◽  
YOSHIO ABE ◽  
NORIO ARAI
Keyword(s):  
Heating System ◽  
Nox Emission ◽  
Radiant Tube ◽  
Elastic Plastic ◽  
Creep Analysis ◽  
Plastic Creep
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