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Unformatted text preview: MESHING BASICS WITH ABAQUS/CAE T7-1 TUTORIAL T7 MESHING BASICS WITH ABAQUS/CAE It is not until encountering Module Mesh in the Abaqus/CAE modeling paradigm that the user reckons with the finite element method itself. Developing skills in creating finite element meshes is particularly important to neophyte users. The purpose of this tutorial is to illustrate basic features of Module Mesh towards development of these skills. The tutorial consists of three examples. Together, they feature: A. Meshing of two- and three-dimensional parts, B. Free, swept, and structured methods of meshing, C. Partitioning for mesh refinement, D. Partitioning to permit meshing with hexahedral elements, E. Defeaturing and virtual topology toolset (omitted; work in progress). First, however, some introductory information may be useful. 1 Module Mesh is used to mesh either a part or an assembly, depending on how the Object field in the Context bar is set by the user. An assembly is made of dependent part instances and/or independent part instances. These designations are made in Module Assembly prior to entering Module Mesh. A finite element model may contain many part instances but only one assembly. The concepts of parts, part instances, and assemblies are important and carried throughout the Abaqus/CAE modeling process. A part instance is the representation of a part in an assembly. For meshing purposes the user must learn to distinguish between dependent and independent part instances as follows because they are handled differently: Dependent part instance The concept of a dependent part instance is provided for cases where an assembly contains multiple identical parts. This is the default part instance upon entering Module Assembly, and it is only a pointer to the original part. Assuming an assembly includes multiple instances of a part, the user need only partition and/or mesh the original part once, and the partition or mesh applies at once to all dependent instances of the part contained in the assembly. The Object field must be set to Part and the part with which the dependent instance is associated must be selected, and is then meshable. In general, modifications of dependent instances are not allowed. The user may partition the part or change the mesh of the part, but cannot change a dependent instance of the part. Independent part instance The concept of an independent part instance is provided for cases where an assembly is comprised of several distinct parts or even only a single part. This type of part instance is a copy of the geometry of the part, and is amenable to modification. Each part instance is meshed individually. Once an independent part instance is designated in Module Assembly the user cannot return to and modify the geometry of the part. Only a part instance that is 1 For additional information, the reader is referred to Ch. 13 The Assembly Module and Ch. 17 The Mesh Module in the ABAQUS/CAE Users Manual, and Appendices B.9, Meshing the Model, and C.11, Module in the ABAQUS/CAE Users Manual, and Appendices B....
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This note was uploaded on 08/09/2011 for the course MAE 168 taught by Professor Klug during the Spring '11 term at UCLA.
- Spring '11