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1、Knowledge BaseSuggested Technique For Analyzing a Model Subjected to Large DeformatiIntroductionPro/MECHANICA Structure can analyze solid models based on large deformations theory. This theory is non-l nature. The standard static analysis is based on linear theory and assumes small deformations only

2、. For exam plate, if the deflection becomes larger than about one half of the thickness of the plate, the middle surface of th becomes appreciably strained. So the plate's geometry is not the same as it was before deformation. When thi large deflections occurs, the plate is actually stiffer than

3、 indicated by ordinary theory and the load-deflection re nonlinear. Stresses for a given load are less and stresses for a given deflection are greater than the stresses th theory indicates. This document outlines the steps involved in successfully setting up and running a analysis ba deformations.Pr

4、ocedure1.Create a rectangular block of size 6" x 1" x 20" as shown below. Figure 12.Constrain the rectangular sections at both ends of the block as shown in Figure 2. Figure 2Constrain one end face in all degrees of freedom. The other end face is given a enforced displacement directio

5、n, as shown in Figure 3. Figure 33.Assign material AL2014 to the rectangular block from the material property set.4.Define a static analysis named Large_deformation. Select the check box for the Calculate large deformaAnalysis Definition form as shown in Figure 4. Figure 4Select the Load Intervals t

6、ab to enter the number of steps in which the loading is applied. These are th steps in which load will be increased from zero until the required load is reached. The number of steps s this model is 4 with the load applied gradually. Figure 55.Run the analysis. To confirm that the enforced displacement was achieved, create a result window for Din Y direction at Load Interval 4 (because the load was applied in 4 intervals as shown in the Figure 6. Figure