Analyzing Thin Structures Efficiently Using Ansys Mechanical — Lesson 2

Описание: Structures whose thickness is significantly smaller than the other two dimensions are referred to as thin structures and analyzing such structures poses some challenges. In this video, we address these challenges by discussing how to efficiently model thin structures as surface bodies and how to use shell elements to mesh them. Nodes of shell elements, in addition to having translational degrees of freedom, have three rotational degrees of freedom. This allows them to have both membrane and bending behavior. In addition, they have several attributes such as thickness, offset, local coordinate system etc. In this walkthrough workshop, we discuss each of these attributes in detail, and also some tips and tricks to keep in mind when using shell elements.

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0:00 - Intro
0:56 - Designation of "thin" geometry
2:19 - Introduction to shell elements
3:42 - Through-thickness stresses of shell elements
4:27 - Shell element coordinate system
6:15 - Specifying shell thickness and offset
9:16 - Demonstration using Midsurface Tool in Discovery
10:15 - Demonstration using Shared Topology in Discovery
13:04 - Demonstration using Element Orientation in Mechanical
15:31 - Demonstration defining contact between solid and surface bodies in Mechanical
17:52 - Treatment of Fixed Support for solid vs. shell bodies
18:22 - Considerations of Pressure loading on shell bodies
20:57 - Demonstration of Membrane and Bending Stress output in Mechanical