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New Ideas in Fatigue Analysis

 

 
Better material and load models make fatigue analysis more useful. By one estimate, premature fatigue fractures in structural components annually cost Europe and the USA about 4% of their gross domestic product. Manufacturers pay the price through long prototype-development cycles, overweight components, unpredictable warranty claims, and loss of customer confidence. The challenge for software developers has been to deliver reliable fatigue-analysis tools because over designing components is no longer a viable option. In a nutshell, fatigue failures stem from small cracks that initiate in weaker grains or grain boundaries in metals under repeated stress cycles. These cracks may propagate, because of cyclic stresses, until the material fractures. However, accurately calculating fatigue life requires considering every significant load in the service life. Loading complexity and resulting stress states mean fatigue analysis is more challenging than simply designing a component to withstand maximum loads. In addition, it is too computationally intensive to use finite-element
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Blast media and blasting abrasives are consumables used in surface preparation processes, such as sandblasting and peening. Search by Specification | Learn more about Blast Media and Blasting Abrasives
Sandblasting and shot peening services bombard media against a surface to meet surface condition requirements. Sandblasting uses abrasive grain to roughen, smooth, shape or clean surfaces. Shot peening uses rounded media to strengthen or dimple a surface. Search by Specification | Learn more about Sandblasting and Shot Peening Services
Roller bearings are used in rotary applications to replace sliding movement with low friction, rolling motion. The principal types of roller bearings are cylindrical, spherical, and tapered. Search by Specification | Learn more about Roller Bearings
Deburring equipment removes burrs, smoothes parting lines, rounds off sharp edges and radiuses corners. Learn more about Deburring Equipment
Shock and vibration (dynamics) testing services or dynamics testing of a finished product or component using shock, sine and random vibration or other dynamic test conditions. Search by Specification | Learn more about Shock and Vibration (Dynamics) Testing Services
Product Announcements
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)
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)
E-Labs, Inc. - Pressure Testing
All metal, plastic, and composite parts intended to contain liquids or gases under pressure are required to undergo stringent pressure testing procedures to meet qualification standards. (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)
E-Labs, Inc. - Liquids or Gases under Pressure Testing
Pressure Testing All metal, plastic, and composite parts intended to contain liquids or gases under pressure are required to undergo stringent pressure testing procedures to meet qualification... (read more)
Integrity Testing Laboratory Inc. - Ultrasonic Peening Software
Supporting Software for Remote Control & UP Optimum Application... (read more)
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)
Daemar Inc. - DMR™ Fiber-Lube™
A Series of composite bushings that allow true self lubrication. Ideal for long-term highly loaded applications. Additional benefits include: low friction values and resistance to corrosion. The... (read more)
Stork Materials Technology - Mechanical Testing
Stork Materials Technology offers a comprehensive range of mechanical services that are designed to ensure products meet industry standards, perform as expected, and will last. We perform fatigue or... (read more)
 
Topics of Interest
Under fatigue loading, cracks develop in high-stress regions which were initially free of any macroscopic defect. A component can endure numerous cycles of loading before the crack is detectable. (Read More)
In this section, the stress-life (S-N) approach to fatigue design is overviewed. This is one of the earliest fatigue design approaches to be developed and can still be a useful tool. Its success is... (Read More)
Consider real-world factors when predicting the life of linear-motion systems. A fundamental question engineers face when designing a motion system is determining how long it will last. Movement in... (Read More)
The efficiency of Ultrasonic Peening (UP) application for fatigue life improvement of automotive welded wheels was studied based on the results of fatigue testing of real wheels in as-welded condition... (Read More)
A fundamental question engineers face when designing a motion system is determining how long it will last. Movement in linear-motion systems (LMS) creates stresses between rolling elements and their... (Read More)
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