Tearing Modulus Analysis for Pipes Containing Constant Depth Internal Flaw

1991 ◽  
Vol 113 (1) ◽  
pp. 156-161 ◽  
Author(s):  
M. D. Rajab ◽  
Akram Zahoor
Keyword(s):  
Carbon Steel ◽  
Critical Stress ◽  
Axial Loading ◽  
Bending Moment ◽  
Steel Pipe ◽  
Load Control ◽  
Displacement Control ◽  
Constant Depth ◽  
Modulus Analysis ◽  
Internal Flaw

The pipe displacement and tearing modulus solutions are derived for pipes containing a uniform depth internal flaw under bending moment or axial loading. The tearing modulus solution is derived for both load control and displacement control conditions. These solutions are then used to construct critical stress curves for various flaw sizes for a carbon steel pipe. These curves are useful in predicting the onset of flaw growth instability. Critical stress curves can be similarly constructed for other materials and pipe geometries.

ANALYSIS OF AN INTERNAL FIXATION OF A LONG BONE FRACTURE

2005 ◽  
Vol 05 (01) ◽  
pp. 89-103 ◽  
Author(s):  
K. RAMAKRISHNA ◽  
I. SRIDHAR ◽  
S. SIVASHANKER ◽  
V. K. GANESH ◽  
D. N. GHISTA
Keyword(s):  
Stress Shielding ◽  
Axial Loading ◽  
Bending Moment ◽  
Fracture Site ◽  
Long Bone ◽  
Radius Of Curvature ◽  
Element Analysis ◽  
Long Bone Fracture ◽  
Fracture Interface ◽  
Tensile Surface

A major concern when a fractured bone is fastened by stiff-plates to the bone on its tensile surface is excessive stress shielding of the bone. The compressive stress shielding at the fracture-interface immediately after fracture-fixation delays bone healing. Likewise, the tensile stress shielding of the healed bone underneath the plate also does not enable it to recover its tensile strength. Initially, the effect of a uniaxial load and a bending moment on the assembly of bone and plate is investigated analytically. The calculations showed that the screws near the fracture site transfers more load than the screws away from the fracture site in axial loading and it is found that less force is required when the screw is placed near to fracture site than the screw placed away from the fracture site to make the bone and plate bend with same radius of curvature when subjected to bending moment. Finally, the viability of using a stiffness graded bone-plate as a fixator is studied using finite element analysis (FEA): the stiffness-graded plate cause less stress-shielding than stainless steel plate.

scholarly journals Crack identification using piezoelectric testing on carbon steel pipe for transverse, longitudinal and hole defects with low excitation frequency

2018 ◽  
Vol 7 (2.14) ◽  
pp. 171
Author(s):  
Ahmed N. Abdalla ◽  
Kharudin Ali ◽  
Johnny Koh Siaw Paw ◽  
Chong Kok Hen ◽  
Tan Jian Ding ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Excitation Frequency ◽  
High Amplitude ◽  
Steel Pipe ◽  
Signal Frequency ◽  
Crack Identification ◽  
High Signal ◽  
Excitation Signal ◽  
Longitudinal Defect ◽  
Transverse Defect

AC excitation signal is most widely used in Non Destructed Testing (NDT) devices for Piezoelectric Technique (PZT) method in an inspec-tion. This paper is presenting the application of piezoelectric with end to end method for defect identification for Carbon Steel Pipe (CSP) where the frequency is used around 1kHz until 6kHz for standard pipe, transverse defect pipe, longitudinal defect pipe and hole defect pipe. From here, the identification of defect signal by based on the signal pick value and different pick signal between ordinary pipe (without defect) and defects pipe are analysis. The result shows that the standard pipe will give the high amplitude of signal compare the defect pipe by based on the type of defect, size of defect and depth of defect. Findings from the comparative study, validate the application of piezoelec-tric show that the different amplitude of the signal is directly proportional with excitation signal frequency and through the experiment, the longitudinal defect is contributed the different high signal until 79.7% compared to the hole and transverse defect 74.4 %.

Research of the Stainless Steel-Concrete-Carbon Steel Circular Concrete-Filled Double Skin Steel Tubes under Axial Compression

2014 ◽  
Vol 1065-1069 ◽  
pp. 1349-1353
Author(s):  
Zhen Kai Duan ◽  
Rui Wang
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Fire Resistance ◽  
Steel Tube ◽  
Steel Pipe ◽  
Building Structures ◽  
Light Pressure ◽  
Structure Variation ◽  
Concrete Filled Steel Tube ◽  
The Impact

Concrete-Filled Steel Tube with high capacity, good ductility and toughness, convenient construction, good fire resistance and other advantages. Currently[1] . Concrete-Filled Steel Tube structure has been widely used in the basic components and the overall structure of behavioral research has made many achievements. There are many advantages of concrete pipe above, but it also has fatal flaws, Stainless steel steel that is the difference[2]. The stainless steel has a beautiful appearance, durability, corrosion resistance, low maintenance costs, good fire resistance and other advantages. New stainless steel pipe concrete structure has both ordinary steel concrete good mechanical properties and excellent durability of stainless steel, can be widely used in buildings and bridges of the marine environment as well as some of the high durability and aesthetic requirements important building structures. Based on the outer stainless steel hollow sandwich - the carbon steel pipe shaft of light pressure test concrete results of load and displacement of the structure, variation of load and strain, and the impact of the empty heart of these parameters.

Failure Analysis Of A Lube Oil Carbon Steel Pipe

2006 ◽  
Vol 21 (4) ◽  
pp. 235-236
Author(s):  
Hani M. Tawancy ◽  
Anwar Ul-Hamid ◽  
Nureddin M. Abbas
Keyword(s):  
Carbon Steel ◽  
Failure Analysis ◽  
Steel Pipe

A Novel Approach to the Study of CaCO3 Precipitation Kinetics on Carbon Steel Pipe

2012 ◽  
Author(s):  
Nan Zhang ◽  
Amy T. Kan ◽  
Wei Shi ◽  
Hamad Amer Alsaiari ◽  
Mason B. Tomson
Keyword(s):  
Carbon Steel ◽  
Steel Pipe ◽  
Precipitation Kinetics ◽  
Novel Approach
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