By Kent Lawrence
The 9 classes during this booklet introduce the reader to powerful finite aspect challenge fixing through demonstrating using the excellent ANSYS FEM software program in a chain of step by step tutorials. themes lined comprise difficulties related to trusses, airplane tension, airplane pressure, axisymmetric and three-d geometries, beams, plates, conduction and convection warmth move, thermal rigidity, and extra. The tutorials are compatible for both expert or scholar use. desk of Contents Lesson 1 - Trusses Lesson 2 - aircraft tension, aircraft pressure Lesson three - Axisymmetric difficulties Lesson four - 3-dimensional difficulties Lesson five - Beams Lesson 6 - Plates Lesson 7 - warmth move, Thermal tension Lesson eight - p-Method Lesson nine - chosen issues
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Extra resources for ANSYS Tutorial Release 9
01 > Apply Trusses 1-29 Figure 1-38 Boundary condition, node 3. Next, pick Node 3 > OK > UY > Constant value > Enter 0 > OK Finally we will apply the 300 lbf forces. 13. Main Menu > Preprocessor > Loads > Define Loads > Apply > Structural > Force/Moment > On Nodes Pick Nodes 1 and 2, Select FY, and Constant value, Enter-300 > OK Figure 1-39 Loads. Let's check the boundary conditions and loads. Use the Utility Menu, top of the screen. 14. Utility Menu > List > Loads > DOF Constraints > On All Nodes Trusses 1-30 Figure 1-40 List constraints.
8% in error. 2-5 THE APPROXIMATE NATURE OF FEM As mentioned above, the stiffness matrix for the truss elements of Lesson 1 can be developed directly and simply from elementary solid mechanics principles. For continuum problems in two and three-dimensional stress, this is generally no longer possible, and the element stiffness matrices are usually developed by assuming something specific about the characteristics of the displacements that can occur within an element. Ordinarily this is done by specifying the highest degree of the polynomial that governs the displacement distribution within an element.
However, two-dimensional models are often easier to develop, easier to solve and can be employed in many situations if they can accurately represent the behavior of the object under loading. 2-2 Plane Stress / Plane Strain A state of Plane Stress exists in a thin object loaded in the plane of its largest dimensions. Let the X- Y plane be the plane of analysis. The non-zero stresses