Fundamentals of Stress-Strength Analysis
podcast episode
If your product is stronger than the applied stress, it should work. The stress/strength relationship concept is well known, but did you know stress and strength change over time? Let’s use the best information and tools for this analysis.
The key idea of stress/strength or derating for electrical engineers is to design a product using materials and components with the suitable strength to withstand the stress condition experienced over the expected duration of use. The term margin refers to the distance between the minimum strength and expected maximum stress. We know failures are more likely to occur when little or no margin exists.
Let’s discuss the information necessary to understand the expected stress and the strength and how both will change over time. There are several ways to estimate failure rates depending on your available data. The better your data, the better your estimates.
The engineers doing the design work select the materials and components and need the best available understanding of stress and strength and how they change over time to design in reliability right from the start. While desirable to get data for every material type and component and every possible applied stress, that just isn’t feasible. So, let’s also talk about a few strategies to narrow the focus to the critical few that require the best possible data for a stress/strength analysis.
As always, this webinar will be very interactive, with plenty of prompts for your comments and questions. So, bring your questions and problems around applying stress/strength concepts. Let’s discuss how you can improve your product’s design with a better analysis.
This Accendo Reliability webinar originally broadcast on 25 September 2018.
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