Safety analysis of thermal creep non-homogeneous thick-walled circular cylinder under internal and external pressure using Lebesgue strain measure

2013 ◽  
Vol 9 (4) ◽  
pp. 499-513 ◽  
Author(s):  
Sanjeev Sharma ◽  
Amrish Kumar Aggarwal ◽  
Richa Sharma
Keyword(s):  
Circular Cylinder ◽  
Safety Analysis ◽  
External Pressure ◽  
Thermal Creep ◽  
Strain Measure

scholarly journals Safety Analysis Using Lebesgue Strain Measure of Thick-Walled Cylinder for Functionally Graded Material under Internal and External Pressure

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
A. K. Aggarwal ◽  
Richa Sharma ◽  
Sanjeev Sharma
Keyword(s):  
Circular Cylinder ◽  
Functionally Graded Material ◽  
Safety Analysis ◽  
External Pressure ◽  
Functionally Graded ◽  
Transition Theory ◽  
Strain Measure ◽  
Graded Material ◽  
Homogeneous Cylinder ◽  
Walled Cylinder

Safety analysis has been done for thick-walled circular cylinder under internal and external pressure using transition theory which is based on the concept of generalized principal Lebesgue strain measure. Results have been analyzed theoretically and discussed numerically. From the analysis, it can be concluded that circular cylinder made of functionally graded material is on the safer side of the design as compared to homogeneous cylinder with internal and external pressure, which leads to the idea of “stress saving” that minimizes the possibility of fracture of cylinder.

Lobar Buckling of Thin-Walled Cylindrical and Truncated Conical Shells Under External Pressure

1974 ◽  
Vol 18 (04) ◽  
pp. 272-277
Author(s):  
C. T. F. Ross
Keyword(s):  
Finite Element ◽  
Circular Cylinder ◽  
Numerical Solutions ◽  
External Pressure ◽  
Element Solution ◽  
Conical Shells ◽  
Varying Thickness ◽  
Complex Boundary ◽  
Thin Walled ◽  
Unsymmetrical Loading

Numerical solutions have been produced for the asymmetric instability of thin-walled circular cylindrical and truncated conical shells under external pressure. The solutions for the circular cylinder have shown that the assumed buckling configurations of Nash [l]2 and Kaminsky [2] were quite reasonable for fixed ends. Comparison was also made of the finite-element solution of conical shells with other analyses. From these calculations, it was shown that the numerical solutions were superior to the analytical ones, as the former could be readily applied to vessels of varying thickness or those subjected to unsymmetrical loading or with complex boundary conditions.

Experimental Investigations of Prebuckled Cylinders Under External Pressure

1979 ◽  
Vol 101 (2) ◽  
pp. 178-184 ◽  
Author(s):  
R. H. Knapp ◽  
C. Dumlao
Keyword(s):  
Circular Cylinder ◽  
External Pressure ◽  
Experimental Investigations ◽  
Structural Form ◽  
Corrugated Surface ◽  
Buckling Failure

The prebuckled cylinder is a geometrical idealization of the actual buckled surface of an axially compressed circular cylinder. It is a polyhedral representation of the cylinder in which flat triangular surfaces are joined to form an undulated (corrugated) surface. Such surfaces have been generally regarded as failed forms of the cylinder; however, recent experimental investigations show that the prebuckled cylinder is remarkably more resistant to buckling failure under external pressure than the true cylinder. The prebuckled cylindrical (PC) shell can now be regarded as a new, unfailed structural form to resist external pressure.

Thermo elastic-plastic transition of transversely isotropic thick-walled circular cylinder under internal and external pressure

2014 ◽  
Vol 10 (2) ◽  
pp. 211-227 ◽  
Author(s):  
Sanjeev Sharma ◽  
Ila Sahay ◽  
Ravindra Kumar
Keyword(s):  
Circular Cylinder ◽  
Thermal Effects ◽  
Isotropic Material ◽  
Transversely Isotropic ◽  
External Pressure ◽  
Transition Theory ◽  
Percentage Increase ◽  
Transversely Isotropic Material ◽  
Effective Pressure ◽  
Content Type

Purpose – The purpose of this paper is to provide the guidance on a design and integrity evaluation of a cylinder under pressure, for which stress analysis has been done for transversely isotropic thick-walled circular cylinder under internal and external pressure with thermal effects. Design/methodology/approach – Transition theory has been used to evaluate plastic stresses based on the concept of generalized principal Lebesgue strain measure which simplifies the constitutive equations and helps to achieve better agreement between the theoretical and experimental results. Findings – It can be concluded that circular cylinder with thermal effects under internal and external pressure made of isotropic material (steel) is on the safer side of the design as compared to the cylinder made of transversely isotropic material (i.e. magnesium and beryl) because percentage increase in effective pressure required for initial yielding to become fully plastic is high for isotropic material (steel) as compared to transversely isotropic material (i.e. magnesium and beryl). It can also be concluded that out of two transversely isotropic materials, beryl is better choice for design of cylinder as compared to magnesium material because percentage increase in effective pressure required for initial yielding to become fully plastic is high for beryl as compared to magnesium. Originality/value – A detailed investigation of thermal transversely isotropic thick-walled circular cylinder under internal and external pressure has been done which leads to the idea of “stress saving” that minimizes the possibility of fracture of cylinder.

scholarly journals Collapse Pressure Analysis of Transversely Isotropic Thick-Walled Cylinder Using Lebesgue Strain Measure and Transition Theory

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
A. K. Aggarwal ◽  
Richa Sharma ◽  
Sanjeev Sharma
Keyword(s):  
Isotropic Material ◽  
Transversely Isotropic ◽  
External Pressure ◽  
Transition Theory ◽  
Percentage Increase ◽  
Transversely Isotropic Material ◽  
Strain Measure ◽  
Collapse Pressure ◽  
Walled Cylinder ◽  
Pressure Analysis

The objective of this paper is to provide guidance for the design of the thick-walled cylinder made up of transversely isotropic material so that collapse of cylinder due to influence of internal and external pressure can be avoided. The concept of transition theory based on Lebesgue strain measure has been used to simplify the constitutive equations. Results have been analyzed theoretically and discussed numerically. From this analysis, it has been concluded that, under the influence of internal and external pressure, circular cylinder made up of transversely isotropic material (beryl) is on the safer side of the design as compared to the cylinders made up of isotropic material (steel). This is because of the reason that percentage increase in effective pressure required for initial yielding to become fully plastic is high for beryl as compared to steel which leads to the idea of “stress saving” that reduces the possibility of collapse of thick-walled cylinder due to internal and external pressure.

Family Role Strain Measure

1986 ◽  
Author(s):  
Grace K. Baruch ◽  
Rosalind C. Barnett
Keyword(s):  
Role Strain ◽  
Family Role ◽  
Strain Measure

Indicators of Social Support and Strain Measure

2000 ◽  
Author(s):  
Heather R. Walen ◽  
Margie E. Lachman
Keyword(s):  
Social Support ◽  
Strain Measure
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