Stress and strain concentration factors of welded tubular joints caused by chord loading

2021 ◽  
pp. 643-649
Author(s):  
A. Romeijn ◽  
J. Wardenier
Keyword(s):  
Stress And Strain ◽  
Strain Concentration ◽  
Tubular Joints ◽  
Concentration Factors

Application of the Deformation Theory of Plasticity for Determining Elastoplastic Stress and Strain Concentration Factors

1976 ◽  
Vol 98 (4) ◽  
pp. 1152-1156 ◽  
Author(s):  
J. P. Eimermacher ◽  
I.-Chih Wang ◽  
M. L. Brown
Keyword(s):  
Deformation Theory ◽  
Analytical Data ◽  
Local Stress ◽  
Failure Criteria ◽  
Constitutive Law ◽  
Stress And Strain ◽  
Strain Concentration ◽  
Theory Of Plasticity ◽  
Concentration Factors ◽  
Von Mises

The deformation theory of plasticity is considered as a means for obtaining a solution to the problem of calculating stress and strain concentration factors at geometric discontinuities where the local stress state exceeds the yield strength of the material. Through the use of the Hencky-Nadai constitutive law and the Von Mises failure criteria, the elastoplastic element stiffness matrix is derived for a plane stress triangular plate element. An elastoplastic solution is arrived at by considering direct-iterative and finite element techniques. Verification of the analytical results is obtained by considering a numerical example and comparing the calculated results with published experimental and analytical data.

scholarly journals Stress and Strain Concentration Factors in Orthotropic Composites with Hole under Uniaxial Tension

2018 ◽  
Vol 5 (1) ◽  
pp. 213-231
Author(s):  
Samit Ray-Chaudhuri ◽  
Komal Chawla
Keyword(s):  
Uniaxial Tension ◽  
Fiber Orientation ◽  
Composite Plates ◽  
Systematic Investigation ◽  
Stress And Strain ◽  
Governing Parameter ◽  
Strain Concentration ◽  
Wide Range ◽  
Orthotropic Composites ◽  
Concentration Factors

Abstract A systematic investigation is carried out on how different parameters influence stress and strain concentration factors (SCF and SNCF) in a composite plate with a hole under uniaxial tension. Flat and singly curved composite plates have been modelled in ANSYS 15.0. The governing parameter includes: (i) size, shape and eccentricity of hole, (ii) number of plies, (v) fiber orientation and (vi) plate curvature. It is observed that different parameters influence the SCF and SNCF with varying degrees. For example, SCF may be as high as 7.16 for a square shaped hole. Also, SCF and SNCF are found to be approximately same in most of the cases. Finally, simplified design formulas are developed for evaluation of SCF for a wide range of hole size, eccentricity and fiber orientation.

Experimental studies to determine strain concentration factors for space tubular joints

1987 ◽  
Vol 22 (4) ◽  
pp. 237-245 ◽  
Author(s):  
R Sundaravadivelu ◽  
C G Nandakumar ◽  
S K Srivastava ◽  
C Ganapathy
Keyword(s):  
Stress Concentration ◽  
Stress Concentration Factor ◽  
Concentration Factor ◽  
Experimental Studies ◽  
Offshore Structures ◽  
Strain Concentration ◽  
Tubular Joints ◽  
Orthogonal Plane ◽  
Concentration Factors ◽  
Semi Empirical

This paper presents studies carried out on grouted and ungrouted space tubular joints, with K in one plane and T in the orthogonal plane. Three models have been tested for different load cases adopting T, K, and both T and K (STK) configurations. The tubular joints used in offshore structures, especially in jacket platforms, are multiplanar and some are grouted and hence their study is essential. The stress concentration factor, SCF, as determined using the semi-empirical formulae which are applicable for planar joints are not appropriate for space, grouted joints. The results of the present study indicates that the SCF as determined by formulae for simple joints is unsafe in the plane of K and conservative in the plane of T for the space joint. The effect of the grout is to reduce the stress concentration.

A method of successive approximation applied to an elastic-plastic deformation theory

1969 ◽  
Vol 4 (1) ◽  
pp. 40-44
Author(s):  
K V Wellner ◽  
I S Tuba
Keyword(s):  
Plastic Deformation ◽  
Circular Hole ◽  
Deformation Theory ◽  
Infinite Medium ◽  
Stress And Strain ◽  
Plane Shear ◽  
Strain Concentration ◽  
Elastic Plastic ◽  
Method Of Solution ◽  
Concentration Factors

Elastic-plastic stress and strain concentration factors are derived for a circular hole in an infinite medium under uniform anti-plane shear conditions. The suggested method of solution could be applied also to other problems of interest.

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