Simulation and evaluation of ultimate strength based safety factor for titanium alloy spherical pressure hull

2019 ◽  
pp. 167-174
Author(s):  
S. Yuan ◽  
Q. Chen ◽  
K. Ye
Keyword(s):  
Titanium Alloy ◽  
Ultimate Strength ◽  
Safety Factor ◽  
Strength Based ◽  
Simulation And Evaluation ◽  
Spherical Pressure

Investigation of the influence of distribution of defections along the axial direction on eternal ultimate strength of titanium alloy pressure hulls of long barrel shape

2021 ◽  
pp. 095440542110406
Author(s):  
Xiangyu Yu ◽  
Hao Zhang ◽  
Hongtao Ji ◽  
Dongkai Xu
Keyword(s):  
Titanium Alloy ◽  
Numerical Simulations ◽  
Ultimate Strength ◽  
Axial Direction ◽  
Processing Method ◽  
Dimensional Error ◽  
Average Ratio ◽  
Plastic Processing ◽  
Strength Based ◽  
Von Mises

During the fabrication of pressure hulls, plastic processing is indispensable, which is an environmental, highly effective, and economical processing method. However dimensional error is also induced during plastic processing. This kind of error is one type of defection, which makes the hulls in danger, especially when the hulls suffer eternal pressure. Von Mises theory is an effective approach to study failure of pressure hulls. In this paper, numerical simulations are performed to investigate influence of distribution of defections along the axial direction on the ultimate strengths of titanium alloy pressure hulls of long barrel shape with two vessel heads using ABAQUS. The results of numerical simulations show that the ultimate strengths of pressure hulls with defections are relative to the location and distribution of defections, and they are decreasing with reduction of the average ratio and standard deviation when the hull suffers eternal pressure. The method of evaluating degradation of ultimate strength based on simulations can be employed to check the safety of pressure hulls.

Further study on the ultimate strength analysis of spherical pressure hulls

2010 ◽  
Vol 23 (4) ◽  
pp. 444-461 ◽  
Author(s):  
B.B. Pan ◽  
W.C. Cui ◽  
Y.S. Shen ◽  
T. Liu
Keyword(s):  
Ultimate Strength ◽  
Strength Analysis ◽  
Spherical Pressure

scholarly journals Research on Fabrication Procedure of Spherical Pressure Hull Made from Titanium Alloy for Deep Submergence Research Vehicle (2 nd Report)

1985 ◽  
Vol 1985 (157) ◽  
pp. 356-368
Author(s):  
Michimasa Endo ◽  
Kimio Yokota ◽  
Ryoichiro Sasano ◽  
Tsutomu Toyohara ◽  
Genta Takano ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fabrication Procedure ◽  
Spherical Pressure

scholarly journals Research on Fabrication Procedure of Spherical Pressure Hull Made from Titanium Alloy for Deep Submersible

1984 ◽  
Vol 1984 (156) ◽  
pp. 425-435 ◽  
Author(s):  
Michimasa Endo ◽  
Kimio Yokota ◽  
Ryoichiro Sasano ◽  
Tsutomu Toyohara ◽  
Genta Takano ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fabrication Procedure ◽  
Spherical Pressure

scholarly journals Strength and Dynamic Assessment of Cage and Bearing for Railway Carriage

2020 ◽  
Vol 70 (1) ◽  
pp. 127-134
Author(s):  
Šlesar Peter ◽  
Jančo Roland
Keyword(s):  
Ultimate Strength ◽  
Dynamic Simulation ◽  
Safety Factor ◽  
Radial Direction ◽  
Dynamic Assessment ◽  
Pressing Force

AbstractThe objective of these analyzes is to evaluate the behaviour of bearing cage in operation and to determinate the safety factor towards to yield and ultimate strength of structure, when cage is under load. Safety factor can be defined as force needed to achieve yield or ultimate strength divided by operation force given from dynamic simulation. Second analyze was based on pressing of whole cage in radial direction to determinate radial pressing force needed to achieve yield and ultimate strength.

scholarly journals Influence of Texture on Mechanical Properties of Titanium Alloy Tubes

2020 ◽  
Vol 844 ◽  
pp. 182-187
Author(s):  
Vira Vakhrusheva ◽  
Nataliia Hruzin ◽  
Ihor Tiutieriev ◽  
Oleksandr Malysh
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Yield Strength ◽  
Ultimate Strength ◽  
Relative Elongation ◽  
Strain Ratio ◽  
Radial Component ◽  
Tube Production ◽  
Tube Material ◽  
Optimal Values

Mechanical properties and texture of tube material formed in the process of tube production were studied. Texture in tubes was estimated by contractile strain ratio (CSR) according to requirements of the standard for tubes. Mechanical properties depend on CSR. Optimal values of mechanical properties were determined: ultimate strength, yield strength and relative elongation which provide CSR values within 1.3...3.5. The texture was evaluated in the process of tube manufacture. An increase in radial component of the texture leads to an increase in CSR. At high CSR values up to 3-3.5, tubes often do not withstand process tests for flattening and bending. Correction of CSR values is required. It was shown that an increase in ductility of tubes increases the value of CSR.

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