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Residual Stress Management: Measurement, Fatigue Analysis and Beneficial Redistribution

From Integrity Testing Laboratory Inc.
 

 
In many cases the residual stresses are one of the main factors, determining the engineering properties of parts and structural components. This factor plays a significant role in fatigue of welded elements. The influence of residual stresses on the multi-cycle fatigue life of butt and fillet welds can be compared with the effects of stress concentration. The main stages of residual stress management are considered in this paper. A number of new engineering tools such as ultrasonic computerized complex for residual stress measurement, software for analysis of the effect of residual stresses on the fatigue life of welded elements as well as a new technology and, based on it, compact system for beneficial redistribution of residual stresses by ultrasonic peening are introduced. Examples of practical application of the developed engineering tools for residual stress management, directed at fatigue life improvement, elimination of distortions in welded elements, residual stress relieving and other applica-tions are discussed.
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Product Announcements
Integrity Testing Laboratory Inc. - Residual Stress Management Services
ITL provides Residual stress services that can significantly affect engineering properties of materials and structural components, notably fatigue life, dimensional stability, corrosion resistance etc... (read more)
Integrity Testing Laboratory Inc. - UltraMARS Software
There is a Supporting Software (SS) that is an integral part of UCC Measurement Unit. The SS allows controlling the measurement process, storing the measured and other data and calculating and... (read more)
Lambda Technologies - Finite Element Analysis (FEA)
Lambda Technologies provides finite element analysis (FEA) services in support of residual stress design and characterization. (read more)
Lambda Technologies - Residual Stress Analysis
Residual stresses are vital to the overall strength and life of critical components. Most processes involved in the manufacture of a component can cause residual stresses that will be either... (read more)
Integrity Testing Laboratory Inc. - Ultrasonic Peening Software
Supporting Software for Remote Control & UP Optimum Application... (read more)
Metal Improvement Company - High-Tech Shot Peening Combats Metal Fatigue
Shot peening is a cold working process in which the surface of a metal part is bombarded with small spherical media called shot. Each piece of shot striking the metal acts as a tiny peening hammer... (read more)
Lambda Technologies - Surface Integrity Studies
Surface Integrity describes the influence of surface property and condition upon material performance. It has long been known that the method of surface finishing and the complex combination of... (read more)
Lambda Technologies - Surface Enhancement
Surface enhancement offers a variety of benefits ranging from increased life to cost reduction when properly designed and optimized for the material and application. Strength and life can be increased... (read more)
Integrity Testing Laboratory Inc. - UltraMARS
UltraMARS forUltrasonic Measurement of Applied and Residual Stress... (read more)
Stork Materials Technology - Fastener Testing
By identifying potential problems and flaws early, Stork Materials Technology fastener testing experts can help you earn needed approvals, extend service life, reduce operating and replacement costs,... (read more)
Topics of Interest
The residual stresses have a significant effect on the process of the initiation and propagation of the fatigue cracks in welded elements. In this paper the results of the residual stress measurement... (Read More)
One of the advantages of ultrasonic techniques for residual stress measurement is that they are non-destructive. Using such techniques, one can measure the residual stresses in the same points many... (Read More)
The development of the Ultrasonic Peening (UP) technology was a logical continuation of the work done before directed on the investigation and further development of known techniques for surface... (Read More)
The development of the Ultrasonic Peening (UP) technology was a logical continuation of the work done before and directed at the investigation and further development of known techniques for surface... (Read More)
Friction stir welding provides a new technology for solid state joining of a wide variety of aluminum alloys that cannot be joined with conventional fusion welds. However, recent work has shown that... (Read More)
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