torsional constant for semi circle and right angle triangle

[KRV_LT]

Help me to find torsional constant for semi circle and right angle triangle. Provide any textbook reference.

[andersen3]

you can use AXISVM lite edition that can be downloaded from here

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You can introduce the shapes you want and look for Ix.
here d=10cm

a=b=10cm

the formula for right angle triangle Civil Engineer's Reference Book: L S Blake (pg2/23) posted here:

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for semicircle the formula is here at page 48 chapter 2 in book FORMULAS FOR STRESS, STRAIN, AND STRUCTURAL MATRICES by Walter D Pilkey ed2 2005 posted here

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