Advanced Life Analysis Methods. Volume 5. Executive Summary and Damage Tolerance Criteria Recommendations for Attachment Lugs

1984 ◽  
Author(s):  
K. Kathiresan ◽  
T. R. Brussat
Keyword(s):  
Damage Tolerance ◽  
Executive Summary ◽  
Analysis Methods ◽  
Life Analysis ◽  
Tolerance Criteria

scholarly journals Evaluation of Damage Tolerance Requirements Using a Probabilistic-Based Life Approach

1986 ◽  
Author(s):  
C. G. Annis ◽  
D. T. Hunter ◽  
T. Watkins
Keyword(s):  
Damage Tolerance ◽  
Turbine Disk ◽  
System Behavior ◽  
Design Specifications ◽  
Actual Material ◽  
Baseline Values ◽  
The Mean ◽  
Life Analysis ◽  
Analysis System ◽  
The Impact

This paper presents the results of a study using Pratt & Whitney’s probabilistic-based life analysis system to define the impact of damage tolerance requirements now being written into design specifications. An advanced turbine disk design was considered for several combinations of NDE starting with baseline values representative of actual material and NDE capabilities. Significant conclusions are: (1) Conventional single-valued descriptions of NDE capability (e.g. 90/95, etc.) are incomplete for comparing competing NDE systems. (2) The scatter about the mean NDE capability has little influence on system behavior. These conclusions suggest that more complete descriptions of damage tolerance requirements should be considered. NDE requirements, for example, might be better stated in terms of system performance goals – acceptable failure and removal rates – rather than any specific POD/confidence limit requirement.

Think tanks and policy analysis in Turkey

2018 ◽  
pp. 235-254
Author(s):  
Göktuğ Morçöl ◽  
Özer Köseoğlu ◽  
Mehmet Zahid Sobacı ◽  
Ömer Faruk Köktaş
Keyword(s):  
Public Policy ◽  
Data Collection ◽  
Academic Discipline ◽  
Historical Context ◽  
Think Tanks ◽  
Executive Summary ◽  
Analysis Methods ◽  
And Migration ◽  
The 1960S ◽  
Over Time

This chapter traces the history of think tanks in Turkey and presents the results of content analyses of the policy papers produced by think tanks in the 2000s. The historical context of the development of think tanks since the 1960s, particularly the democratisation process and internationalization, are discussed. Data collection or analysis methods were applied in a very small percentage of the earlier papers. Most of the papers include an abstract or executive summary, but smaller percentages of them include purpose statements and problem definitions. A large majority of the papers are descriptive and they lack recommendations or evaluations. There are noticeable improvements in the inclusion of purpose statements and problem definitions in the papers over time, but data collection and analysis methods were used in only slightly more papers over time. The number of Turkish think tanks grew over time and they have become more active and influential in foreign affairs, democratization, human rights, energy and migration. The chapter concludes that the proliferation of the numbers and activities of think tanks in recent decades in Turkey and the growing community of public policy scholars, who have played roles in think tanks, hold promise for the future development of public policy as a distinct academic discipline in Turkey.

Analysis Methods of Mechanism Life from its Dynamic Performance

2013 ◽  
Vol 365-366 ◽  
pp. 249-252
Author(s):  
Tian Yang Ma ◽  
Shi Qi Li
Keyword(s):  
High Performance ◽  
Dynamic Performance ◽  
Analysis Method ◽  
Dynamic Mechanisms ◽  
Analysis Methods ◽  
Life Analysis ◽  
Long Life

With the dynamic mechanisms requirements on high performance and long Life, a Life-analysis method based on index of its dynamic performance is worked out. By setting a systematic model of mechanism with its parameters, synthesizing characteristic changes of key components as well as its adjustment ability to control the system, different conditions of the mechanisms Life have been worked out. Related tests proved its efficiency.

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