Analysis and Assessment of Stress in Two Typical Drawing Tube Headers

2006 ◽  
Author(s):  
Zengliang Gao ◽  
Jie Chen ◽  
Gangsi Cai ◽  
Xin Ren ◽  
Qing Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Measurement ◽  
Cover Plate ◽  
Normal Operating Condition ◽  
Element Analysis ◽  
Fillet Weld ◽  
Start Up ◽  
Assessment Of Stress ◽  
Maximum Stresses

Finite element analysis and stress measurement are carried out for two typical drawing tube headers, which is a new kind of tube header without fillet weld. The material of the drawing tubes and header is SA335-P91. Two cases, normal operating condition (case 1) and cold start up condition (case 2), are analyzed. The maximum stresses are located in the inner corner of the drawing tube for one row of tube header, while the maximum stresses for both cases are located in the inner corner of the cover plate for two row of tube header. The stresses at the drawing tube for both cases meet ASME requirement for stress for both drawing tube headers. Fatigue life of the two row of drawing tube header is more than 106 cycles.

Deep Hole Drill Residual Stress Measurement Technique Experimental Validation

2006 ◽  
Vol 524-525 ◽  
pp. 549-554 ◽  
Author(s):  
W.R. Mabe ◽  
W.J. Koller ◽  
A.M. Holloway ◽  
P.R. Stukenborg
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Test Specimen ◽  
Experimental Validation ◽  
Stress Measurement ◽  
Reference Solution ◽  
Deep Hole ◽  
Element Analysis ◽  
Validation Test

This paper presents the results of an experimental validation of the deep hole drill residual stress measurement method. A validation test specimen was fabricated and plastically loaded to impose a permanent residual stress field within the specimen. The validation test specimen was designed to provide a variety of stress profiles as a function of location within the specimen. A finite element analysis of the validation test specimen was performed in order to provide a reference solution for comparison to the deep hole drill experimental results. Results from experimental testing of the validation test specimen agree well with the finite element analysis reference solution, thereby providing further validation of the deep hole drill method to measure residual stresses.

Upheaval Creep of Rock Dumped Flexible Flowline

2014 ◽  
Author(s):  
Yang Zhengmao ◽  
Kristian Norland ◽  
Neil Brown ◽  
Daniel Karunakaran
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
High Pressures ◽  
Elevated Temperatures ◽  
Water Injection ◽  
Analysis Model ◽  
Flexible Pipe ◽  
Element Analysis ◽  
Nonlinear Bending ◽  
Start Up

For the protection from dropped object/fishing trawl impact, flexible flowlines are normally trenched or rock-dumped. And hence, upheaval buckling and lateral buckling may be promoted by the elevated temperatures and high pressures. Due to the unique properties of un-bonded flexible flowline, the flexible flowline may creep in the trench or rock berm when it is subjected to cyclic pressure and temperature changes due to start-up and shut-down of flowline in service. In this paper, a finite element analysis model for the global buckling and upheaval creep of flexible flowline is proposed. In this model the effect of bending stiffness hysteresis are considered in addition to the temperature and pressure changes in each start-up/ shut-down cycle. A case study of a 10″ water injection flowline is performed by using finite element analysis software package ANSYS. The nonlinear general beam section is used to simulate the specific flexible pipe behavior, nonlinear bending behavior but linear axial behavior.

scholarly journals Finite Element Analysis of a Spur Gear Considering Mass Relief Strategies

2021 ◽  
Vol 31 (2) ◽  
pp. 36-49
Author(s):  
Lauro Miguel Lima Rocha ◽  
Marco Túlio Santana Alves
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Local Stress ◽  
Spur Gear ◽  
Spur Gears ◽  
Element Analysis ◽  
The Core ◽  
Core Thickness ◽  
Structural Influence ◽  
Maximum Stresses

This paper deals with analyzing the structural influence of mass reliefs in spur gears. For this purpose, a system composed of pinion and a gear was designed, such that for gear several geometries were designed with different reliefs shapes and soul thicknesses. From the proposed geometries, finite element analysis (FEA) was performed, and the tooth stresses of each model were compared with the solid gear. From the results, it was observed that the tooth stresses are reduced in some cases. Besides, from the aforementioned cases, it is possible to observe that the maximum stresses may take place in its core instead of the teeth (rim area). On the other hand, based on other cases, the core thickness plays an important role as a criterion that defines the local stress.

A Finite Element Analysis of Surface Pocket Effects in Hertzian Line Contact

1999 ◽  
Vol 122 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Jiaxin Zhao ◽  
Farshid Sadeghi ◽  
Harvey M. Nixon
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Kinematic Hardening ◽  
Lubricant Film ◽  
Solid Contact ◽  
Element Analysis ◽  
Beneficial Effects ◽  
Fea Model ◽  
Start Up ◽  
Significant Compression

During start up and shut down of heavily loaded rolling/sliding contacts, the lubricant film separating the surfaces is extremely thin and not fully developed. The load is supported by both the solid and the lubricant. Under extreme conditions, there is no lubricant film and the load is solely supported by the solid contact. However, when surface pockets are engineered on the surface of rolling/sliding elements, lubricant can be trapped in the pockets and deform with the pockets. Finite element analysis [FEA] of the deformation of a single empty pocket indicates that the volume of the pocket significantly decreases under an applied load. Therefore, when the pocket is filled with a lubricant, the lubricant will undergo significant compression. This compression enables lubricant to support part of the load and provide beneficial effects, such as reducing friction and expelling the lubricant during start up and shut down. This research presents an FEA model of a rigid cylinder in contact with an elastic and/or elastic-linear-kinematic-hardening-plastic half space with lubricant filled surface pocket(s). Results of lubricant filled pockets are compared with those of empty pockets. The results demonstrate the beneficial effects of load sharing mechanism by the lubricant. [S0742-4787(00)00801-8]

scholarly journals Finite Element Analysis of Cover Plate Joint under Ultimate Loading

2016 ◽  
Vol 156 ◽  
pp. 16-23 ◽  
Author(s):  
Maitham Alibrahemy ◽  
Sébastien Durif ◽  
Philippe Bressolette ◽  
Abdelhamid Bouchaïr
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cover Plate ◽  
Element Analysis ◽  
Ultimate Loading

Three nonlinear performance relationships in the start-up state of IPMC strips based on finite element analysis

2010 ◽  
Vol 19 (3) ◽  
pp. 035014 ◽  
Author(s):  
Han Min Peng ◽  
Qing Jun Ding ◽  
Yao Hui ◽  
Hua Feng Li ◽  
Chun Sheng Zhao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Start Up ◽  
Nonlinear Performance
Sign in / Sign up

Export Citation Format

Share Document