Home Resource Center Newsletters Technical Tidbits Technical Tidbits Newsletter The Technical Tidbits Newsletter covers a range of materials science topics, including material properties, stress integrity, reliability, fatigue, strain hardening, strengthening mechanisms, and more. If you would like to see what topics we covered prior to 2015, please check the Technical Tidbits archives, 2008-2011 or 2012-2014. For additional information, Contact Us. Resources Issue 99-March 2017-Accelerated Life Testing A brief discussion on using short-term testing to estimate long-term failure rates. Issue 98-February 2017-Prediction of Temperature-Dependent Change A brief discussion on how to predict the long-term effect of temperature on material properties. Issue 97-January 2017-Instantaneous vs Metallurgical Changes A brief discussion on how temperature affects material properties. Issue 96-December 2016-Properties are Functions A brief discussion on how material properties almost always depend on some other parameter. Issue 95-November 2016-Other Statistical Ranges A brief discussion of confidence limits, tolerance limits and the MMPDS Basis System. Issue 94-October 2016-Process Capability A brief discussion of what it means for a process to be capable and what you can expect for material properties from such capable processes. Issue 93-September 2016-Tuning and Customizing Properties A brief discussion of the tradeoffs involved when trying to tweak properties of standard materials. Issue 92-August 2016-Material Property Ranges and Statistics A brief discussion of how typical material properties may vary and lead the design engineer into trouble. Issue 91-July 2016-Metal Properties and System Properties A brief discussion of the different classifications of material properties. Issue 90-June 2016-Hardness v. Strength A brief discussion of the correlation between hardness and strength. Issue 89-May 2016-Stress Relaxation Data Learn how to use stress relaxation data. Issue 88-April 2016-Testing Stress Relaxation Resistance Learn about stress relaxation testing. Issue 87-March 2016-Stress Relaxation Learn about the causes, effects, and prevention of stress relaxation. Issue 86-February 2016-Hertz Stress Read how the concepts of Hertzian contact theory have made their controversial way into connector design, and how some of the principles can help improve reliability. Issue 85-January 2016-Advice for New Engineers Delve into this collection of random advice and wisdom(?) accumulated throughout an engineering carreer. All opinions expressed in this publication are expressly that of the author. Issue 84-December 2015-What Makes a Good Spring Material Learn which material properties make a material a good candidate for your spring or connector design, depending on what spring behavior you want to optimize. Issue 83-November 2015-Spring Types Part 8-Miscellaneous Springs Discover a variety of miscellaneous spring types, not covered in previous editions, that may be of use to your application. Issue 82-October 2015-Spring Types Part 7-Bellows and Diaphragms Introduce yourself to pressure sensor bellows and diaphragms, and learn how their unique shapes improve stability even at very large deflections. Issue 81-September 2015-Spring Types Part 6-Coil Springs Review the properties of the coil spring, and learn how to adjust the geometry to fine-tune the spring rate. Issue 80-August 2015-Spring Types Part 5-The Unique Stiffness Behavior of Belleville Washers Investigate Belleville washers, with unique spring rate behavior that can be deliberately varied from positive to negative in the same single spring. Issue 79-July 2015-Spring TypesPart 4-Spring Washers Find out how spring washers may be used in parallel or series to customize overall spring characteristics. Issue 78-June 2015-One-piece vs. Two-piece Terminal Socket Contacts Compare and contrast one piece and two piece connector sockets, and determine which style is right for your design. Issue 77-May 2015-Spring Types Part 3-Torsion Bars Familiarize yourself with connector designs based on the torsion bar model for improved wiping action and electrical contact. Issue 76-April 2015-Spring Types Part 2-Simply Supported Arch Beams Learn how arch beam contacts can improve upon the performance of cantilever beam springs. Issue 75-March 2015-Spring Types Part 1-Cantilever Beams Explore different types of springs that operate under the principles of cantilever beams. Issue 74-February 2015-Friction Calculations Find out how to determine the appropriate coefficient of friction for use in your calculations and model simulations. Issue 73-January 2015-Introduction to Friction Investigate why the coefficient of friction is not actually a material property, but rather a system property dependent on many variables.