I am facing difficulty in calculating the elastic modulus from the stress-strain curve. I have prepared a welding joint and tested it for tensile properties. Kindly suggest the best way to calculate the elastic modulus of the joint from the stress-strain curve obtained from tensile testing.
Regards,
The elastic modulus of an object is defined as the slope of its stress–strain curve in the elastic deformation region
You must determine the slope of linear part. Which defiantly the elastic behavior.
The question is not quite clear. Young's modulus is a material property. If you ask for the elastic property of a weld joint you consider the structural property stiffness. Young's modulus is the slope (tangent or secant) of a stress-strain curve. Then you get the tangent or the secant elastic modulus. I wonder if your problem is, how to get the Young's modulus locally (for the weld) from the test of the whole junction. Then you would need local testing (maybe from hardness tests or strain measurement with digital image correlation (DIC)).
Dear Kulwant,
I suggest extracting the entire tension sample from the longitudinal area of the weld and be sure to use an extensometer when performing the tension test.
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