Home Resource Center Newsletters Newsletter Archives Technical Tidbits 2012-2014 Technical Tidbits Archive: 2012-2014 Resources Fatigue-Issue 72-December 2014 Explore some of the unexpected ways that fatigue failures can crop into your designs. Fatigue Failure Diagnosis-Issue 71-November 2014 See how fatigue failures are diagnosed in the field, and how to distinguish them from other failure modes. Simulating Fatigue Behavior-Issue 70-October 2014 Discover how to use finite element analysis and other simulation methods to estimate fatigue life. Linear Elastic Fracture Mechanics Fatigue Analysis-Issue 69-September 2014 Learn about the fracture mechanics fatigue method, and how it is used to generate Paris Law constants. Stress Intensity and Fracture Toughness-Issue 68-August 2014 Introduce yourself to the concepts of fracture toughness, and learn what stress intensity is. Strain Life Fatigue Analysis Methods-Issue No 67-July 2014 Consider the advantages and disadvantages of stress life and strain life fatigue methods compared side by side. Introduction to the Strain Life Fatigue Method-Issue 66-June 2014 Familiarize yourself with strain life fatigue methods, useful at lower cycles than stress life fatigue methods. Stress Life Fatigue Methods-Issue 65-May 2014 Review the concepts of stress life discussed previously and read some relevant commentary on the accuracy and usefulness of this method. Goodman (Haigh) and Other Related Diagrams-Issue 64-April 2014 Learn about Goodman and other diagrams that are used to determine maximum allowable alternating stresses under a given loading condition. Mean Stress and Alternating Stress-Issue 63-March 2014 Discover how to use S-N data generated in fully reversed cyclic loading to estimate life under loading conditions with different stress ratios. Fatigue Life Prediction Using S-N (Wohler) Diagrams-Issue 62-February 2014 Find out how to properly estimate the fatigue life or fatigue strength of your component using statistically relevant data and the appropriate modification factors. Variables Affecting Fatigue Performance-Issue 61-January 2014 Examine other variables such as anisotropy or edge condition that may affect the service life of your particular application. Effect of Stress Concentration Factors on Fatigue Life-Issue 60-December 2013 Consider how the stress concentration effects of notches, grooves, and corners can reduce the fatigue life of your components. Fatigue Strength Modifying Factors-Part 3-Issue 59-November 2013 Determine the effects of component size, geometry, and loading on the fatigue performance of your design. Fatigue Strength Modifying Factors-Part 2-Issue 58-October 2013 Discover how to estimate the fatigue strength or fatigue life of your part at temperatures greater than the test temperature. Fatigue Strength Modifying Factors-Part 1-Issue 57-September 2013 Read about how the condition of the surface of your part can affect the fatigue life. Statistical Analysis of S-N Wohler Diagrams-Issue 56-August 2013 See how to come up with a statistically meaningful and relevant fatigue strength or maximum allowable stress for your application. S-N Wohler Diagrams-Issue 55-July 2013 Examine how the results of fatigue test data are plotted in a usable manner, and how fatigue strength is defined on a case by case basis. Characterization of Fatigue Behavior-Issue 54-June 2013 Familiarize yourself with how and for how long the fatigue behavior of a material is characterized. Fatigue and Stress Ratios-Issue 53-May 2013 Learn how the stress ratio describes the severity of a particular cyclical loading cycle, and provides insight into what testing you need to do to ensure reliability. Introduction to Fatigue-Issue 52-April 2013 Introduce yourself to the concept of fatigue failure, and what you can do to prevent the process from causing your design to fail. Strain Hardening And Formability-Issue 51-March 2013 Explore how anisotropy and the strain hardening behavior of a material affects how easily you can form it. Strain Hardening-Issue 50-February 2013 Learn about strain hardening in a material, and how it governs the manufacturing and peformance of that material in your designs. Tensile Strength Considerations-Issue 49-January 2013 See how easily-measured tensile strength is determined, and how a material's ductility (or lack thereof) influences the appearance of the fracture in a tensile test. Elastic Modulus-Issue 48-December 2012 Discover how the elastic modulus helps to determine the performance of your connector design in multiple ways. Yield Strength And Other Near Elastic Properties-Issue 47-November 2012 Learn the importance of near elastic properties, and the various tests that are used to determine them. Stress-Strain Concepts Revisited-Part 2-Issue 46-October 2012 Introduce yourself to the important material properties derived from a stress-strain curve, and how the tensile test is instrumental in obtaining them. Stress-Strain Concepts Revisited-Part 1-Issue 45-September 2012 Learn how a tensile test is used to generate a stress-strain curve, which contains many important material properties you need to know about. Connector Insertion Force-Issue 44-August 2012 Find out how to minimize the insertion force upon mating your connector, without degrading the electrical contact performance. Alloy 390-Issue 43-July 2012 Learn about Alloy 390, an alloy with strength near that of high strength copper beryllium and conductivity near that of high conductivity copper beryllium. Summary Of Electrical Contact Coatings-Issue 42-June 2012 Review the different considerations for various coating types, and how to choose the optimum material for your design. The Effects of Arcing-Issue 41-May 2012 Explore the damaging effects of electrical arcing, and what you can do to minimize any potential damage. Introduction to Arcing Contacts-Issue 40-April 2012 Familiarize yourself with the different types of electrical arcing in separable contacts, and where, when and why they occur. Silver As A Contact Material-Issue 39-March 2012 Read about the advantages of silver for contact materials, particularly in higher voltage separable contacts. The Platinum Group Metals As Contact Materials-Issue 38-February 2012 Find out where platinum, palladium, and other similar metals are used for electrical contact surfaces, and what to watch out for when you do use them. Gold As A Contact Material-Issue 37-January 2012 Explore the advantages of gold and what makes it an ideal material for electrical contacts, when cost constraints allow it.