Specifies the ratio EpTp/EbTb, where: Ep is the axial modulus of the attached pipe; Eb is the axial modulus of the bend; Tp is the average wall thickness of the attached pipe; and Tb is the average wall thickness of the bend.
If you do not define EpTp/(EbTb), the software uses a default value of 1.0. This value affects the calculation of the flexibility factor for bends.