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Manufacturing Processes - Nondestructive Testing - NDT


Non-Destructive Evaluation/Testing - NDE/NDT


Thermoelastic Stress Analysis - 5 KB
Thermoelastic Stress Analysis (TSA)
The process of nondestructive testing determines the existence of flaws, discontinuities, leaks, contamination, thermal anomalies, or imperfections in materials, components or assemblies without impairing the integrity or function of the inspected component. NDE is also utilized for real-time monitoring during manufacturing, measurement of physical properties such as hardness and internal stress, inspection of assemblies for tolerances, alignment, and periodic in-service monitoring of flaw/damage growth in order to determine the maintenance requirements and to assure the reliability and continued safe operation of the part.

Nondestructive evaluation (NDE) is becoming increasingly important to the design-through-manufacture process. The cost of parts and components is ever-increasing due to the corresponding costs of material and labor. Consequently, emphasis is being placed on use of NDE early in the design
and fabrication process. Often components are too costly to permit the luxury of destructively testing a number of them to demonstrate their design goals. Environmental and liability concerns are also resulting in increased use of NDE.

NDT is a Quality Assurance management tool which can give impressive results when used correctly. It requires an understanding of the capabilities and limitations of the various methods available and knowledge of the relevant standards and specifications for performing the tests. Materials, products and equipment which fail to achieve their design requirements or projected life due to undetected defects may require expensive repair or early replacement Such defects may also be the cause of unsafe conditions or catastrophic failure, as well as loss of revenue due to unplanned plant shutdown.

NDT technology is constantly being improved and new methods developed, particularly in an effort to keep pace with the development of new materials (i.e. composites) and applications. Advances in the use of lasers and imaging technology (including video, holography and thermography) have made non contact NDT more viable in many situations. Optical fibers and new piezo-electric materials are allowing the creation of intelligent materials and structures which can not only monitor themselves but may even respond to their environment. Computer advances have allowed signal processing techniques and expert systems to be used which enhances the quality of the information obtained using traditional and new NDT methods.


 

 

Nondestructive Testing - NDT




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