Calculation of shear stresses in CBEAM element

ECor
ECor Altair Community Member
edited November 2023 in Community Q&A

Hello,

I am calculating shear on a pin that links two parts. It is a rod section with r = 5 [mm] and CBEAM elements (cf. image below). The solver is MSC Nastran.

image

When I obtain the CBEAM Forces I have, as I understand, three shear force sources :

  • CBEAM Web Shear Plane1
  • CBEAM Web Shear Plane2
  • CBEAM Total Torque

My question then is, to manually calculate the shear stress, the Total Torque is taken into account into the Web Shear components or should I add it separely ? That is :

Shear_Plane = sqrt(ShearPlane1 ^2 + ShearPlane2 ^2) 

Shear_Stress = (4/3) * (Shear_Plane / A) + Total_Torque * r / J

Is that correct ?

 

Thanks in advance ! 

Cordially,

               EC

 

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Answers

  • Michael Herve_21439
    Michael Herve_21439
    Altair Employee
    edited November 2023

    Hello @ECor ,

     

    as your solver is Nastran, we cannot commit on providing you guidelines for computing the shear stress based on native Nastran results.

    You may need to look in other websites (MSC forum, ...) to find out what is the recommended computation method

     

    Best Regards,

    Michael

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