A Discussion of Quantitative Stress Analysis in Long-Term Embarked Work

2020 ◽  
pp. 274-281
Author(s):  
Salvador Ávila ◽  
Ronald Boring
Keyword(s):  
Stress Analysis ◽  
Quantitative Stress

Analysis of the Operational Loading of the Strip Mine Conveyer Drive

2015 ◽  
Vol 732 ◽  
pp. 215-218
Author(s):  
Jaroslav Václavík ◽  
Petr Bohdan
Keyword(s):  
Stress Analysis ◽  
Measured Data ◽  
Operational Stress ◽  
Measured Time ◽  
Time Histories ◽  
Strip Mine ◽  
Gear Box

This paper demonstrates the operational stress analysis, performed on the strip mine conveyer drive after the damage has occurred at the second installed gear box. According the long term test it has been found; that the damage was probably caused due to the different breaking moment, introduced on both drives. The examples of measured time histories as well as the evaluation and comparison of measured data are presented, too.

A New Approach to Stress Analysis of Vascular Devices Using High Resolution Thermoelastic Stress Analysis

2006 ◽  
Vol 5-6 ◽  
pp. 63-70 ◽  
Author(s):  
James Eaton-Evans ◽  
Janice M. Dulieu-Barton ◽  
Edward G. Little ◽  
Ian A. Brown
Keyword(s):  
High Resolution ◽  
Stress Analysis ◽  
Medical Devices ◽  
Thermoelastic Stress ◽  
Thermoelastic Stress Analysis ◽  
New Approach ◽  
Full Field ◽  
Vascular Stents ◽  
Thermoelastic Response ◽  
Quantitative Stress

Thermoelastic Stress Analysis (TSA) is a non-contacting technique that provides full field stress information and can record high-resolution measurements from small structures. The work presented in this paper summarises the application of TSA to two types of small medical devices that are used to treat diseased arteries; angioplasty balloons and vascular stents. The use of high resolution optics is described along with a calibration methodology that allows quantitative stress measurements to be taken from the balloon structure. A brief account of a study undertaken to characterise the thermoelastic response from Nitinol is also included and it is demonstrated that thermoelastic data can be obtained from a stent at high resolutions.

scholarly journals Quantitative stress analysis by means of standard infrared thermographic equipment

1996 ◽  
Author(s):  
S. Offermann ◽  
C. Bissieux ◽  
J.L. Beaudoin ◽  
H. Frick
Keyword(s):  
Stress Analysis ◽  
Quantitative Stress

Global energy challenges and the national economy: stress scenarios for Russia

foresight ◽  
2017 ◽  
Vol 19 (2) ◽  
pp. 174-197 ◽  
Author(s):  
Ilya Kuzminov ◽  
Alexey Bereznoy ◽  
Pavel Bakhtin
Keyword(s):  
Strategic Planning ◽  
Stress Analysis ◽  
National Economy ◽  
Fossil Fuels ◽  
Negative Impact ◽  
Global Energy ◽  
Content Type ◽  
Russian Economy ◽  
National Systems

Purpose This paper aims to study the ongoing and emerging technological changes in the global energy sector from the frequently neglected perspective of their potential destructive impact on the Russian economy. Design/methodology/approach Having reviewed existing global energy forecasts made by reputable multilateral and national government agencies, major energy corporations and specialised consulting firms, the authors noticed that most of them are by and large based on the extrapolation of conventional long-term trends depicting gradual growth of fossil fuels’ demand and catching-up supply. Unlike this approach, the paper focuses on the possible cases when conventional trends are broken, supply–demand imbalances become huge and the situation in the global energy markets is rapidly and dramatically changing with severe consequences for the Russian economy, seriously dependent on fossil fuels exports. Revealing these stress scenarios and major drivers leading to their realisation are in the focus of the research. Based on the Social, Technological, Economic, Environmental, Political, Values (analytical framework) (STEEPV) approach, the authors start from analysing various combinations of factors capable to launch stress scenarios for the Russian economy. Formulating concrete stress scenarios and assessing their negative impact on the Russian economy constitute the next step of the analysis. In conclusion, the paper underlines the urgency to integrate stress analysis related to global energy trends into the Russian national systems of technology foresight and strategic planning, which are now in the early stages of development. Findings The analysis of global energy market trends and various combinations of related economic, political, technological and ecological factors allowed to formulate four stress scenarios particularly painful for the Russian economy. They include the currently developing scenario “Collapse of oil prices”, and three potential ones: “Gas abundance”, “Radical de-carbonisation” and “Hydrogen economy”. One of the most important conclusions of the paper is that technology-related drivers are playing the leading role in stress scenario realisation, but it is usually a specific combination of other drivers (interlacing with technology-related factors) that could trigger the launch a particular scenario. Research limitations/implications This study’s approach is based on the assumption that Russia’s dependence on hydrocarbons exports as one of the main structural characteristics of the Russian economy will remain intact. However, for the long-term perspective, this assumption might not hold true. So, new research will be needed to review the stress scenarios within the context of radical diversification of the Russian economy. Practical implications This paper suggests a number of practical steps aimed at introducing stress analysis as one of the key functions within the energy-related sectoral components of the Russian national systems of technology forecasting and strategic planning. Originality/value The novelty of this paper is determined both by the subject of the analysis and approach taken to reveal it. In contrast to most of research in this area, the main focus has been moved from the opportunities and potential benefits of contemporary technology-related global energy shifts to their possible negative impact on the national economy. Another important original feature of the approach is that existing global energy forecasts are used only as a background for core analysis centred around the cases when conventional energy trends are broken.

Fatigue Life Evaluation for the Repair Methods of High Pressure Gas Pipeline

2019 ◽  
Author(s):  
Woo Sik Kim
Keyword(s):  
Finite Element ◽  
High Pressure ◽  
Residual Stresses ◽  
Stress Analysis ◽  
Structural Integrity ◽  
Gas Pipeline ◽  
Optimum Process ◽  
Term Operation ◽  
Steel Sleeve

Abstract High pressure gas pipeline must maintain structural integrity during the design life. To do this, periodic pipeline inspections are carried out, and fitness-for-service assessments are performed on defects found by inspection. Defects that do not meet the evaluation criteria should be repaired and replaced to ensure the integrity of the pipeline structure at the same level as before the defect. High pressure gas pipeline repair method is applied to repair of composite reinforced sleeve and repair of steel sleeve. Although there have been many studies on the short-term structural integrity evaluation of rupture pressure in these repair methods, there is insufficient research to verify whether the long-term operation of the repair pipeline maintains the long-term structural integrity of the repaired pipe. In this study, an optimum process to improve structural integrity was established by investigating effect of the process variables on fatigue lifetime of steel-sleeve repair welds in buried gas pipeline. Residual stresses in the repair welds were derived through sequentially-coupled temperature-stress analysis using ABAQUS, which is a commercial finite element analysis program. In addition, variations of operating stresses were derived by finite element linear elastic stress analysis. Fatigue lifetimes of the steel-sleeve repair welds were evaluated by substituting the derived weld residual stresses and operating stress variations into the structural stress/fracture mechanics approach as input. Appling this method confirms long-term integrity over 200 years in terms of fatigue the abstract here in italics.

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