III. A. 2 Stress Strength Analysis

The Perfect Strength and Stress Concepts

Recently Peter Stuttard asked if I knew of a reference for the perfect strength and perfect stress concepts. I didn’t and asked for a bit of explanation of the phrases.

Here is his reply (via Linkedin, btw a great tool to get and stay in touch) posted with permission with minor formatting edits.

To learn more about Peter check out his Linkedin profile.

Fred

Thanks for responding so quickly, the concepts of Perfect Strength and Perfect Stress are related to your discussion re Parts Count and Parts Stress predictions and reading this on your web site prompted me to ask you about them. [Read more…]

by Fred Schenkelberg 3 Comments

The Stress-Strength Concept in Practice

Ideally, in every design of every component, the stress–strength relationship looks like this figure. The stress is well below the strength.

This implies there is very little chance of failure due to the element being overstressed.

Also, ideally, we fully characterize all stresses and all strengths for each element of a product. This is generally difficult to accomplish and it is rarely done to that extent.

[Read more…]

by Fred Schenkelberg 19 Comments

Stress Strength Normal Assumption

Ideally, in every design of every component, the stress – strength relationship looks like this figure. The stress is well below the strength. [Read more…]