Tensile Strength and Yield Strength
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Re: Tensile Strength and Yield Strength
Re: Tensile Strength and Yield Strength -- ashok_k	Post Reply	Top of thread	Forum

Posted by: swearingen ® 12/22/2005, 08:49:13 Author Profile Mail author Edit

As everyone knows, geometry has a great effect on how materials behave under load. That is why materials are tested by standards such as ASTM. The standards give a specific size and shape of each specimen so that the test data can be compared apples to apples. To answer your question directly - you will get stress concentrations in one shape that you don't get in the other, resulting in what appears to be an "early" failure for the same cross sectional area. In this case, it's probable caused by shear lag.

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Re: Tensile Strength and Yield Strength
Re: Re: Tensile Strength and Yield Strength -- swearingen	Post Reply	Top of thread	Forum

Posted by: ashok_k ® 12/23/2005, 00:03:26 Author Profile Mail author Edit

Thankx.. But if I take std stresses given in design data for the perticular material,for design calculations. Is that gives correct analysis for loads even if shapes are differant? Regards, Ashok.

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Re: Tensile Strength and Yield Strength
Re: Re: Tensile Strength and Yield Strength -- ashok_k	Post Reply	Top of thread	Forum

Posted by: ashok_k ® 12/28/2005, 09:56:21 Author Profile Mail author Edit

THANK YOU FOR RESPONCE, I AM DOING HAND CALCULATION. SO, WE COME TO KNOW THAT STD. SRESSES MAY CHANGE ACCORDING TO SHAPE. AM I CORRECT?

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Re: Tensile Strength and Yield Strength
Re: Re: Tensile Strength and Yield Strength -- ashok_k	Post Reply	Top of thread	Forum

Posted by: fluidspin ® 12/28/2005, 00:52:57 Author Profile Mail author Edit

Hi, your correct analysis will have to take into account the shape. Which means to say you will need to have different calculations for each type, say the rectangular and another for the cylindrical shaped. Std stresses applies for the material in question but as mentioned by another forumer, geometry affects stresses no doubt. Loads are determined by you and factor this same value into your calculation for each shape you should get a respective result. Don't mind me asking, are you using a FE software to do this or by hand calculation?

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