Beneficial stress-strain behavior of moly-columbium steel line pipe

JOM ◽  
1975 ◽  
Vol 27 (9) ◽  
pp. 15-23 ◽  
Author(s):  
G. Tither ◽  
M. Lavite
Keyword(s):  
Stress Strain ◽  
Line Pipe ◽  
Strain Behavior

The Effects of Plate Stress-Strain Behavior and Pipemaking Variables on the Yield Strength of Large-Diameter DSAW Line Pipe

1984 ◽  
Vol 106 (2) ◽  
pp. 119-126 ◽  
Author(s):  
A. K. Shoemaker
Keyword(s):  
Yield Strength ◽  
Order Approximation ◽  
Large Diameter ◽  
Strain Level ◽  
Plate Material ◽  
Stress Strain ◽  
Line Pipe ◽  
Strain Behavior ◽  
Accumulated Strain ◽  
Cyclic Straining

Recent stringent specifications for large-diameter double-submerged-arc-welded gas-transmission line pipe include requirements that limit the range of allowable pipe yield strengths instead of the previous requirement of a minimum yield-strength value. These restricted pipe yield-strength ranges require control of the range of the yield strength in the plate used to make the pipe, knowledge of the relationship between the plate and pipe yield strength, and the effect of pipemaking (forming) variables on this relationship. The present study was conducted to determine the interrelationships among plate yield strength, plate stress-strain properties, pipe-forming variables, and pipe yield strength. In the first part of this work, pipe-forming strains were measured after each forming operating during actual pipe fabrication and the strains compared to the calculated values. The experimental and analytical values were in good agreement; thus, the cyclic straining of the original plate material during pipe forming was determined. In the second part of the program, specimens of typical line-pipe steels were cyclically loaded in the laboratory according to the cyclic histories that sections in the plate would experience when fabricated into pipe. The results showed a significant effect of the plate stress-strain behavior, as well as the amount of straining (or forming) on the resulting yield strength. Because of the complexities of all these interrelationships and the strain gradients developed through the pipe wall during pipemaking, a series of pipe were fabricated from steels having different plate stress-strain properties and the plate and pipe yield strengths were compared. Varying amounts of sinking (compressive straining) in the pipe O press and of pipe expansion were examined. Correlation of the plate and pipe yield strengths showed that, as a first order approximation, the pipe yield strength equated to the flow stress in the plate at a strain level equal to the total accumulated strain that occurs at the neutral axis of the pipe during the pipemaking operation. This approximation can only be made if work hardening occurs in the plate material at that total accumulated strain level. Otherwise, it can only be stated that the pipe yield strength will be less than that of the original steel plate.

Stress Strain Behavior of Steel Fibre Based Concrete in Compression

2012 ◽  
Vol 1 (3) ◽  
pp. 32-38
Author(s):  
Tantary M.A ◽  
◽  
Upadhyay A ◽  
Prasad J ◽  
◽  
...  
Keyword(s):  
Steel Fibre ◽  
Stress Strain ◽  
Strain Behavior

Cord/Rubber Material Properties

1985 ◽  
Vol 58 (4) ◽  
pp. 830-856 ◽  
Author(s):  
R. J. Cembrola ◽  
T. J. Dudek
Keyword(s):  
Finite Element ◽  
Material Model ◽  
Rubber Composites ◽  
Stress Strain ◽  
Element Analysis ◽  
Rubber Layer ◽  
Strain Behavior ◽  
Nonlinear Stress ◽  
Interlaminar Shear ◽  
Mechanics Of Composite Materials

Abstract Recent developments in nonlinear finite element methods (FEM) and mechanics of composite materials have made it possible to handle complex tire mechanics problems involving large deformations and moderate strains. The development of an accurate material model for cord/rubber composites is a necessary requirement for the application of these powerful finite element programs to practical problems but involves numerous complexities. Difficulties associated with the application of classical lamination theory to cord/rubber composites were reviewed. The complexity of the material characterization of cord/rubber composites by experimental means was also discussed. This complexity arises from the highly anisotropic properties of twisted cords and the nonlinear stress—strain behavior of the laminates. Micromechanics theories, which have been successfully applied to hard composites (i.e., graphite—epoxy) have been shown to be inadequate in predicting some of the properties of the calendered fabric ply material from the properties of the cord and rubber. Finite element models which include an interply rubber layer to account for the interlaminar shear have been shown to give a better representation of cord/rubber laminate behavior in tension and bending. The application of finite element analysis to more refined models of complex structures like tires, however, requires the development of a more realistic material model which would account for the nonlinear stress—strain properties of cord/rubber composites.

Compressive stress–strain behavior of steel fiber reinforced-recycled aggregate concrete

2014 ◽  
Vol 46 ◽  
pp. 65-72 ◽  
Author(s):  
Jodilson Amorim Carneiro ◽  
Paulo Roberto Lopes Lima ◽  
Mônica Batista Leite ◽  
Romildo Dias Toledo Filho
Keyword(s):  
Compressive Stress ◽  
Steel Fiber ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Fiber Reinforced ◽  
Stress Strain ◽  
Aggregate Concrete ◽  
Strain Behavior

Effect of cooling rates on stress-strain behavior in Au-47.5 at.%Cd alloy

1978 ◽  
Vol 12 (3) ◽  
pp. 265-269 ◽  
Author(s):  
S. Miura ◽  
F. Hori ◽  
N. Nakanishi
Keyword(s):  
Stress Strain ◽  
Cooling Rates ◽  
Strain Behavior
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