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Re: bending and tensile stresses

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Posted by jmt (192.31.106.35) on December 12, 2002 at 08:38:12:

In Reply to: bending and tensile stresses posted by donovan britz on December 12, 2002 at 05:51:03:

There are 2 ways of getting a margin of safety for your situation.

The easiest and most conservative method is to add the tensile and bending stresses and compare to the ultimate tensile stress of the material. This method is also applicable to a situation where the total stress is compared to the yield strength of the material.

The second method is applicable for the ultimate strength calculation only. A plastic bending factor is applied to the bending stress only. The plastic bending factor is based on the cross section. The reduced bending stress is then added to the tensile stress and compared to the ultimate tensile strength of the material.

I would use the first method if you can show it good that way. You can email me at ------------ if you have any more questions.

: Hi

: When you have calculated the combined bending and tensile stresses, what ultimate stress should this not exceed? The ultimate tensile stress?

: Thank you.

: Donovan

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Comments:
: There are 2 ways of getting a margin of safety for your situation. : The easiest and most conservative method is to add the tensile and bending stresses and compare to the ultimate tensile stress of the material. This method is also applicable to a situation where the total stress is compared to the yield strength of the material. : : The second method is applicable for the ultimate strength calculation only. A plastic bending factor is applied to the bending stress only. The plastic bending factor is based on the cross section. The reduced bending stress is then added to the tensile stress and compared to the ultimate tensile strength of the material. : I would use the first method if you can show it good that way. You can email me at -------------- if you have any more questions. : : : Hi : : When you have calculated the combined bending and tensile stresses, what ultimate stress should this not exceed? The ultimate tensile stress? : : Thank you. : : Donovan

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