scholarly journals Study of the Effect of Sulphide Stress Corrosion on the Load Bearing Capability of API 5L Grade B Steel used in Petroleum Pipelines

2020 ◽  
Vol 53 (2) ◽  
pp. 13
Author(s):  
M. D. H. C. Peiris ◽  
W. L. Perera ◽  
G. I. P. De Silva
Keyword(s):  
Stress Corrosion ◽  
Load Bearing ◽  
Petroleum Pipelines

scholarly journals The MFL technique – Basic application for PT cable break detection in concrete structures

2018 ◽  
Vol 199 ◽  
pp. 06013
Author(s):  
Martin Wilcke ◽  
Andrei Walther ◽  
Klaus Szielasko ◽  
Sargon Youssef
Keyword(s):  
Magnetic Flux ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Concrete Structures ◽  
Corrosion Cracking ◽  
Magnetic Flux Leakage ◽  
Physical Measurement ◽  
Load Bearing ◽  
Measurement Principle ◽  
Flux Leakage

From the beginning of building techniques creating pre-stressed and accordingly post-tensioned concrete structures until the late 1980ies manufacturers and construction companies dealt with pre-stressing steel material vulnerable to stress corrosion cracking. Almost every load-bearing structure requires regular inspection on a mandatory basis. Due to knowledge of pre-stressed structural reinforcement susceptible to stress corrosion cracking being used during construction or visible damage alongside the tendon area arises the demand for detailed investigation of cracks within the post-tensioned steel elements. Even though the pre-stressed steel elements of a structure are not especially at risk for stress corrosion cracking by its manufacturing process, the natural deterioration of the building fabric and manifold eventual defects and failure during structure erection encourage the requirement for an inspection of their structural integrity at least within the most important load-bearing areas. Therefore needed investigations can be carried out by application of the non-destructive magnetic flux leakage measurement technique for single bar elements and stranded wire tendons even inside cladding tubes. This testing method is subject to successful research work for more than 30 years now and has proven its validated functionality with impressive results on a big number of investigated structures including bridge elements, truss beams and container components.Starting with the basic physical measurement principle of magnetic flux leakage for dipole-formation in the area of fractures of the magnetized pre-stressed steel elements this document presents the practical application possibilities and development history of the testing method.With the consecutively presented further development of the BetoFlux-System we can provide a piece of testing equipment which combines the advantages of a pure physical measurement principle with the economical requirements for an on-site-application to investigate pre-stressed reinforcing steel elements at an early stage prior to structural collapse hazards.

Surface Films on Zircaloy-2 Samples Cracked in Neutral Aqueous NaCl by Stress Corrosion

1973 ◽  
Vol 31 ◽  
pp. 46-47
Author(s):  
R.A. Ploc
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Film Thickness ◽  
Stress Corrosion ◽  
Zirconium Dioxide ◽  
Surface Film ◽  
Surface Films ◽  
Continuous Layer ◽  
Transmission Electron ◽  
Product Film

Samples of low-nickel Zircaloy-2 (material MLI-788-see(1)), when anodically polarized in neutral 5 wt% NaCl solutions, were found to be susceptible to pitting and stress corrosion cracking. The SEM revealed that pitting of stressed samples was occurring below a 2000Å thick surface film which behaved differently from normal zirconium dioxide in that it did not display interference colours. Since the initial film thickness was approximately 65Å, attempts were made to examine the product film by transmission electron microscopy to deduce composition and how the corrosion environment could penetrate the continuous layer.

Load-Bearing in the Ovine Medial Tibial Condyle: Effect of Meniscectomy

1993 ◽  
Vol 06 (02) ◽  
pp. 100-104 ◽  
Author(s):  
D. M. Pickles ◽  
C. R. Bellenger
Keyword(s):  
Knee Joint ◽  
Contact Area ◽  
Mammalian Species ◽  
Total Removal ◽  
Load Bearing ◽  
Human Knee ◽  
Biochemical Effects ◽  
Pressure Sensitive ◽  
Medial Meniscectomy ◽  
Tibial Condyle

SummaryTotal removal of a knee joint meniscus is followed by osteoarthritis in many mammalian species. Altered load-bearing has been observed in the human knee following meniscectomy but less is known about biochemical effects of meniscectomy in other species. Using pressure sensitive paper in sheep knee (stifle) joints it was found that, for comparable loads, the load-bearing area on the medial tibial condyle was significantly reduced following medial meniscectomy. Also, for loads of between 50 N and 500 N applied to the whole joint, the slope of the regression of contact area against load was much smaller. Following medial meniscectomy, the ability to increase contact area as load increased was markedly reduced.The load bearing area on the medial tibial condyle was reduced following meniscectomy.

Effect of long-term loading on timber load-bearing elements

2015 ◽  
Vol 10 (2) ◽  
pp. 25-34
Author(s):  
Kristian Sogel
Keyword(s):  
Load Bearing

PARTICULAR QUALITIES OF CONSTRUCTION AND TECHNICAL EXPERTISE OF STRUCTURES AGRICULTURAL WAREHOUSE OF MINERAL FERTILIZERS

2020 ◽  
Author(s):  
I.O. Egorochkina ◽  
◽  
I.A. Serebryanaya ◽  
S. A. Jamaldinov ◽  
F.A. Bataeva ◽  
...  
Keyword(s):  
Functional State ◽  
Mineral Fertilizers ◽  
Technical Expertise ◽  
Technical Documentation ◽  
Load Bearing ◽  
Building Load

The article describes the features of construction and technical expertise of structures of agricultural warehouse of mineral fertilizers. A draft program for visual and detailed instrumental inspection of building load-bearing structures has been developed. In accordance with the recommendations of the regulatory and technical documentation, measures have been developed to repair and restore the functional state of damaged structures.

Sign in / Sign up

Export Citation Format

Share Document