131 134 explicit dynamics with ansys ls dyna explicit

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Unformatted text preview: dominant. 5. For the linear elements (PLANE42, SOLID45), prediction of the first bending mode is significantly affected by irregularly shaped elements. Linear elements have an inherent inability to properly account for shear energy in bending modes resulting in excessive stiffness within the element. The inclusion of extra shape functions in the element formulation help in correcting the shear energy prediction, but are only suitable to rectangular element shapes. Hence, rectangular element results for PLANE42 and SOLID45 are in good agreement. However, as the elements are distorted, the stiffness of the element increases hence overpredicting the bending mode natural frequency. 6. For the quadratic elements (PLANE2, PLANE82, SOLID92, SOLID95), prediction of the first bending mode is very good. Irregular element shapes for quadratic elements have little effect on the solution accuracy. 2–42 ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. Part III. ANSYS LS-DYNA Study Descriptions Chapter 3: ANSYS LS-DYNA Study Overview This section of the manual contains ANSYS LS-DYNA studies. The related input listings appear in Appendix C:, ANSYS LS-DYNA Input Listings. The ANSYS LS-DYNA Studies are presented to demonstrate the use of the LS-DYNA Solver with the ANSYS preprocessor and postprocessor. The LS-DYNA Solver that is packaged wit...
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