scholarly journals The relationship between plate curvature and elastic plate thickness: A study of the Peru-Chile Trench

1991 ◽  
Vol 96 (B10) ◽  
pp. 16625 ◽  
Author(s):  
Anne V. Judge ◽  
Marcia K. McNutt
Keyword(s):  
Elastic Plate ◽  
Plate Thickness ◽  
Plate Curvature ◽  
The Relationship

Research on Structural Strength of Catamaran Superstructure Constructed with Aluminum Alloy

2012 ◽  
Vol 538-541 ◽  
pp. 3165-3169
Author(s):  
Yuan Zhou Zheng ◽  
Yan Ling Huang ◽  
Kai Zhou Peng
Keyword(s):  
Aluminum Alloy ◽  
Structural Strength ◽  
Design Method ◽  
Plate Thickness ◽  
Side Wall ◽  
Front Wall ◽  
Strength Theory ◽  
Local Strength ◽  
Standard Design ◽  
The Relationship

The design of Superstructure constructed with aluminum alloy do not have to follow the traditional standard design method. It can be designed by applying strength theory and ANSYS program or MSC Patran / Nastran program, which can ensure the strength requirements with the selected aluminum alloy components and make the weight of the ship lightest. In this paper, the 42.4m catamaran sightseeing boat is used as an example. The structural strength of the superstructure constructed with aluminum alloy is calculated by MSC Patran / Nastran program. The distribution of the superstructure stress is obtained, which proved the size of the selected components of the superstructure can meet the requirements of the local strength and can be the reference of selecting the structure size. As the other conditions are unchanged, the the local thickness of the junction of the front wall and the side wall of the compass deck is changed. the relationship between plate thickness and stress is obtained. It is found that as The plate thickness is thicker, the stress there decreases; and as the thickness is smaller, it is obvious to reduce stress as the plate thickness Increase. when the thickness increases to a certain extent, the effect of the plate stress decreases is not obvious.

The steel plate curvature analytic modeling for the snake rolling with the same roll diameters

2021 ◽  
Vol 118 (2) ◽  
pp. 205
Author(s):  
Lian-Yun Jiang ◽  
Jin-Bo Huang ◽  
Tao Zhen ◽  
Yao-Yu Wei ◽  
Zhen-Lei Li
Keyword(s):  
Shear Strain ◽  
High Performance ◽  
Steel Plate ◽  
Axial Strain ◽  
Plate Thickness ◽  
Theoretical Method ◽  
Simulation Method ◽  
Rolling Process ◽  
Speed Ratio ◽  
Plate Curvature

The snake rolling can keep the plate shape well, and the larger shear strain produced by the snake rolling is conducive to the deformation penetrating into the center of the heavy plate. So it provides a new method for producing the high-performance heavy steel plate. However, there is little research on the plate curvature modeling which is the key to achieve the snake rolling process. The deformation region was divided into four different zones at most which was depended on the positions of the two neutral points, and this number could be dropped to three or two in some other conditions. It was divided into three different cases according to the neutral point position: I, II, III and IV; I, II and IV; II and IV. The unit pressure and the accumulated shear strain deviation between the top and bottom portions of the plate with every case were established, and the plate curvature caused by shear strain was calculated on this basis. The plate curvature caused by the axial strain was also calculated according to the flow criterion. The approximations are corrected by a fitting coefficient E. The homogeneity coefficient E was introduced during the plate curvature modeling process to make the model more accurate. Then the total plate curvature model was established. The simulation of snake rolling process is carried out by using ANSYS LS-DYNA, and the plate curvature results are compared with the theoretical method. The results showed that the maximum and minimum relative error of the model was 11.61% and 0.28% compared to the simulation method, which can be applied for the online plate curvature control application with the effect of some self-learning methods. The plate curvature affecting law with the different process parameters (roll offset, roll speed ratio, rolling reduction, plate thickness and so on) was obtained in this paper. The research about the plate curvature modeling will provide important references for the heavy steel plate snake rolling production.

Behavior of Localized Bottom Bulge in Aboveground Oil Storage Tanks Under Liquid Pressure

2001 ◽  
Vol 124 (1) ◽  
pp. 59-65
Author(s):  
Shoichi Yoshida
Keyword(s):  
Plastic Strain ◽  
Plate Thickness ◽  
Deformation Analysis ◽  
Bottom Plate ◽  
Storage Tanks ◽  
Liquid Pressure ◽  
Element Analysis ◽  
Oil Storage ◽  
Relationship Of ◽  
The Relationship

The bottom plate of aboveground oil storage tanks can bulge, separating from the foundation due to welding deformation. When such a bulge is subjected to liquid pressure, it deforms continuously to make contact with the foundation from the edge, and the remaining area of the bulge decreases with increasing liquid pressure. As a result, the deformation is extremely localized and plastic strain occurs at the bulge. This paper presents a plane strain finite element analysis for the evaluation of localized bottom bulges in aboveground oil storage tanks. Load-incremental, elastic-plastic large deformation analysis is carried out considering the bottom plate contact with the foundation. The relationship of the plastic strain at the bulged bottom plate to the liquid pressure is discussed together with the deformation of the bulge. As a result, the bottom plate thickness has a significant effect on the deformation, but the bulged height does not. After the bulged center makes contact with the foundation, the stress and strain do not increase with increasing liquid pressure. In addition, the permissible bulged profile specified by API Standard 653 elastically deforms to make contact with the foundation under low liquid pressure.

Quantification and Statistical Analysis of Microstructural Features in As-Cast Ti-6Al-4V Titanium Alloy

2013 ◽  
Vol 747-748 ◽  
pp. 828-832
Author(s):  
Xiang Jun Cheng ◽  
Guo Qing Wu ◽  
Jia Qi Zhao
Keyword(s):  
Image Processing ◽  
Grain Size ◽  
Titanium Alloy ◽  
Statistical Analysis ◽  
Normal Distribution ◽  
Plate Thickness ◽  
Two Phase ◽  
The Relationship ◽  
Α Lamella ◽  
Cast Plate

Based on microstructure of as-cast Ti-6Al-4V titanium alloy, an image processing to simplify model of β grain size, α lamella space was developed and a quantitative statistical method of β grain size, α lamella space in two-phase titanium alloys was established, with which β grain size and α lamella space of as-cast Ti-6Al-4V titanium alloy with different plate thickness were analyzed. The relationship between β grain size, α lamellar space and cast plate thickness was discussed. The results show that β grain size and α lamellae thickness nearly linearly increase as plate thickness increasing. β grain size has normal distribution and with cast plate thickness increasing, the dispersion gets larger.

scholarly journals Overriding plate thickness control on subducting plate curvature

2015 ◽  
Vol 42 (10) ◽  
pp. 3802-3810 ◽  
Author(s):  
Adam F. Holt ◽  
Bruce A. Buffett ◽  
Thorsten W. Becker
Keyword(s):  
Plate Thickness ◽  
Thickness Control ◽  
Plate Curvature ◽  
Subducting Plate

scholarly journals Analysis of the phase structure of fluid vibrations with floating longitudinally compressed elastic plate in nonlinear interaction of the surface progressive waves

2020 ◽  
Vol 16 (3) ◽  
pp. 226-237
Author(s):  
Anton A. Bukatov ◽  
Keyword(s):  
Elastic Plate ◽  
Plate Thickness ◽  
Compressive Force ◽  
Finite Amplitude ◽  
Harmonic Amplitude ◽  
Vertical Acceleration ◽  
Third Order ◽  
Multi Scale ◽  
Wave Disturbances ◽  
Vertical Displacements

Based on the asymptotic expansions obtained by the multi-scale method up to the third order of smallness for the potential velocity of liquid particles and the plate-fluid surface elevation, the dispersion properties of the vibrations generated by the interaction of progressive surface wave harmonics of finite amplitude are analyzed in the article. The effect of nonlinearity of acceleration of vertical displacements of an elastic plate on the dispersion characteristics of wave disturbances is studied. The dependence of the vibration frequency is estimated by taking into account the nonlinearity of the first and second approximations values, the plate thickness, and the longitudinal compressive force. It is shown that the sign of the amplitude of the second interacting harmonic and the nonlinearity of the acceleration of vertical displacements of the longitudinally compressed elastic plate affect the vibration phase. It was found that with a decrease in the wavelength of the initial harmonic, the influence of the plate’s nonlinearity vertical acceleration is enhanced. The presence of compressive force is manifested in a decrease in the frequency of vibrations of the wave disturbance in comparison with the frequency obtained in the absence of longitudinal compression, both with a positive and negative sign of the second interacting harmonic amplitude.

Crustal underplating and effective elastic plate thickness of the Laxmi Ridge, northern Arabian Sea

2018 ◽  
Vol 744 ◽  
pp. 82-92 ◽  
Author(s):  
Akhil Mishra ◽  
A.K. Chaubey ◽  
K.M. Sreejith ◽  
Shravan Kumar
Keyword(s):  
Elastic Plate ◽  
Arabian Sea ◽  
Plate Thickness ◽  
Northern Arabian Sea

Variations of elastic plate thickness at continental thrust belts

1988 ◽  
Vol 93 (B8) ◽  
pp. 8825 ◽  
Author(s):  
M. K. McNutt ◽  
M. Diament ◽  
M. G. Kogan
Keyword(s):  
Elastic Plate ◽  
Plate Thickness ◽  
Thrust Belts

Research on Residual Stress for Hull Plate in Cold Forming

2013 ◽  
Vol 838-841 ◽  
pp. 347-354 ◽  
Author(s):  
Ren Jun Yan ◽  
Yue Lin ◽  
Chen Xin ◽  
Yong Hu
Keyword(s):  
Residual Stress ◽  
Plate Thickness ◽  
Mechanical Analysis ◽  
Stress And Strain ◽  
Pure Bending ◽  
Cold Forming ◽  
Surface Ship ◽  
The Relationship ◽  
Stress And Strain Distribution ◽  
Peak Value

Based on the mechanical analysis of the plate formed under pure bending, we developed the theoretical model of residual stress distribution pattern under single curvature cold-forming. The numerical method is used to simulate the forming procedure of The 3-d surface ship CNC bending machine, which help us acquire the stress and strain distribution of cold formed component and the relationship between steel plate thickness and its peak value of residual stress. The results show that the simulation model makes accurate prediction of the residual stress. The peak value of residual stress increases with the increase of plate thickness, and it decreases with the increase of bend radius.

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