The formulas and the meanings of the symbols are quite difficult to understand, but I will explain the principles as simply as possible, limiting them to basic phenomena!
The most commonly used model for CAE analysis of viscoelastic materials, including elongational flow behavior, is the integral-type constitutive equation known as the K-BKZ model. In this column, I would like to explain the principles while limiting the discussion to as simple phenomena as possible. For more details, please refer to the related links. Please refer to specialized books for information on strain tensors and invariants. 【Contents (partial)】 ■ K-BKZ model ■ Role of the memory function m ■ Role of the damping function h ■ Finger strain tensor C^-1 ■ Uniaxial elongational viscosity calculation formula at constant strain rate *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.
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