scholarly journals Reference piping design stress analysis

1973 ◽  
Author(s):  
S. Westerman ◽  
S. Mathias
Keyword(s):  
Stress Analysis ◽  
Design Stress

CAD-design, stress analysis and in vitro evaluation of three leaflet blood-pump valves

1992 ◽  
Vol 14 (4) ◽  
pp. 275-286 ◽  
Author(s):  
B. Knierbein ◽  
N. Rosarius ◽  
A. Unger ◽  
H. Reul ◽  
G. Rau
Keyword(s):  
Stress Analysis ◽  
Blood Pump ◽  
In Vitro Evaluation ◽  
Design Stress

Structural Stress Analysis and Reliability Evaluation for a New Speed Reducer

2016 ◽  
Vol 33 (5) ◽  
pp. 631-640 ◽  
Author(s):  
Y.-T. Tsai ◽  
K.-H. Lin
Keyword(s):  
Stress Analysis ◽  
High Speed ◽  
Reliability Evaluation ◽  
Speed Reduction ◽  
Performance Requirements ◽  
Reduction Mechanisms ◽  
Speed Reducer ◽  
Structural Stresses ◽  
Bending Fracture ◽  
Design Stress

AbstractReducers are extensively used in many machines for reducing the speeds of mechanism. This paper proposed a new design of speed reducers to meet the performance requirements in high rigidness and large speed-reduction ratios. The movements of the reducer are designed based on the principles of differential displacements of the deceleration gear rings. The geometric models of the related components were designed using CAD software. The motions of mechanism were simulated for identifying the feasibility of designing including acquiring the kinematic properties. The mathematical models of structural stresses analysis were proposed so that the bending and contact stresses of the gear rings could be evaluated, accordingly. Finite element methods (FEM) were also used to analyze the structural stresses of the reducer. The studied results showed that the bending fracture of the gear rings would prior to its contacting fracture. The allowable loading of the reducer was then established according to the analyzed results of the maximum stresses on various transmitted torques. The methods of reliability evaluation were reported for considering the strength variation and calculating the reliabilities of the reducer at various loadings. The studied results are useful in structural design, stress analysis and reliability evaluation for developing high speed-reduction mechanisms.

Assessment of an Existing Hot Tap Connection on the Bord Gáis Éireann Brighouse Bay Gas Export Terminal

2014 ◽  
Author(s):  
Peter Boothby ◽  
Graham Canty ◽  
Robert Andrews ◽  
Simon Slater
Keyword(s):  
Stress Analysis ◽  
Shell Thickness ◽  
Critical Assessment ◽  
Conference Paper ◽  
Replacement Ratio ◽  
Element Analysis ◽  
Fit For Purpose ◽  
Area Replacement Ratio ◽  
The Uk ◽  
Design Stress

A previous IPC conference paper (1) described the technical challenges associated with the installation of a new hot tap connection, supplementary to an existing hot tap connection, on the Bord Gáis Éireann Brighouse Bay high pressure gas export terminal in the UK. Work carried out to verify that the hot tap connection would be fit for purpose included a pipe stress analysis, Finite Element Analysis (FEA) and Engineering Critical Assessment (ECA). These assessments were performed because the split tee shell thickness and consequently also the circumferential fillet weld leg lengths did not achieve the 2 × carrier pipe thickness criterion required by UK specifications for applications where design stress levels exceed 30% specified minimum yield strength. Subsequently, it was identified that the existing hot tap connection installed in 2001 also did not meet the 2 × carrier pipe thickness criterion. Furthermore the material grade was lower than that for newer hot tap, i.e. P355 compared with P460 and the tee had been chamfered down from 50 mm to 40 mm at the ends, leading to reduced section circumferential fillet welds. This resulted in a leaner design than that for the newer hot tap and an ASME B31.3 area replacement calculation revealed that the area replacement ratio barely achieved the 1.0 requirement of the code suggesting a limited tolerance to system loading. Consequently similar stress analysis, FEA and ECA assessments to those previously undertaken were also subsequently performed for the existing hot tap connection. This paper provides details of the analyses and results obtained to determine the integrity of the existing hot tap split tee assembly which required a bespoke approach and a need to challenge conventional thinking.

FORCE DISTRIBUTIONS AND STRESS ANALYSIS OF THE INTOR-CH SUPERCONDUCTING COIL

1984 ◽  
Vol 45 (C1) ◽  
pp. C1-901-C1-904 ◽  
Author(s):  
C. Marinucci ◽  
L. Palladino ◽  
G. Pasotti ◽  
M. V. Ricci ◽  
G. Vécsey
Keyword(s):  
Stress Analysis ◽  
Superconducting Coil
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