Question about a brittle material with a flaw

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The discussion centers on the behavior of brittle steel with a flaw, specifically analyzing its stress-strain graph in relation to the function f(x) = (e^x) - 1. The participants explore the implications of flaws on the material's performance, noting that significant flaws can lead to failure prior to reaching Ultimate Tensile Strength (UTS) and Yield Strength (YS). Additionally, the conversation touches on the relationship between uniform elongation and total elongation in the context of brittle materials.

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  • Brittle material mechanics
  • Stress-strain curve analysis
  • Ultimate Tensile Strength (UTS) and Yield Strength (YS) concepts
  • Data analysis techniques in material testing
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Materials scientists, mechanical engineers, and researchers analyzing the mechanical properties of brittle materials and their failure mechanisms.

stinlin
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Would the graph of a brittle steel with a flaw in it (from load 0 to sharp-notch strength, or SNS) somewhat resemble a graph of f(x) = (e^x) - 1? I know this seems like a weird question, but I'm analyzing some data gathered at the lab, and I can't seem to make sense of it.
 
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How much plastic/permanent deformation does the test achieve.

Are the uniform and total elongation close?

With a large enough flaw, I would expect failure might occur before UTS, and maybe even before YS is achieved.
 

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