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Forums
Engineering
Materials and Chemical Engineering
1018 carbon steel tensile test explanation
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[QUOTE="jrmichler, post: 6260510, member: 638574"] All carbon steel has the same elastic modulus, and that modulus is linear. When two different samples of similar steel show different elastic moduli, and one of those is curved, the experimental setup is suspect. Please reread the rest of my post with that in mind. When the labels in your spreadsheet are confusing, or flat wrong (stress vs strain), readers can easily get the idea that you rushed the process without thinking about what is being done. The fact that a specimen was loaded into a machine, a button was pushed, and data output, does not mean that the data is correct. Given what you have showed us, I suggest that you spend several hours studying the machine, and asking yourself what could go wrong. That includes studying the owner's manual in detail. Hint: If the strain was measured with an extensometer, those are subject to a number of errors. Pretend that you have an exam tomorrow on error sources in the entire setup - test machine, data reduction, strain measurement, force measurement, etc. Another hint: When I said "several hours", I was being conservative, not facetious. Expect to take longer than that if you want to do it right. [/QUOTE]
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Engineering
Materials and Chemical Engineering
1018 carbon steel tensile test explanation
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