*************************** **Shell Bending Stiffness** *************************** :: Shell bending stiffness = {model_name} {float_list} [M/Lt2] ----------------------- **Description / Usage** ----------------------- This required card is used to specify the model for the Shell bending stiffness property D which is defined as D=Et3/12(1-ν2), where E is the elastic modulus, ν Poisson’s ratio, and t the shell thickness. The units are M-L2/t2 (or F-L). The elastic modulus is set through the *Lame MU* and *Lame Lambda* cards. This property is needed for the inextensible cylindrical shell equations (see *EQ = Shell Tension*). Definitions of the input parameters are as follows: +-----------------+------------------------------------------------------------------------------------------------------------+ |{model_name} |Name of the Shell bending stiffness coefficient model. This parameter can have one of the following values: | | |**CONSTANT**. | | | | | | * {float1} - The value of the shell bending stiffness. | +-----------------+------------------------------------------------------------------------------------------------------------+ The details of each model option are given below: +---------------------+--------------------------------------------------------------------------------------------------------+ |**CONSTANT** |For the **CONSTANT** model, {float_list} is a single value: | | | | | | * - Standard value of the coefficient D. | +---------------------+--------------------------------------------------------------------------------------------------------+ -------------- **References** -------------- GT-027.1: GOMA’s Shell Structure Capability: User Tutorial (GT-027.0). P. R. Schunk and E. D. Wilkes. GT-033.0: Structural shell application example: tensioned-web slot coater (GT-033.0). P. R. Schunk and E. D. Wilkes.