Types of Analysis: Buckling Analysis Slender models subjected to compressive axial loads tend to undergo sudden large lateral deformation. Nonlinear analysis calculates stresses, displacements, strains, and reaction forces at all desired levels of loading. c) Boundary conditions vary during loading (as in problems with contact). b) Induced displacements are large enough to change the stiffness. Types of Analysis: Nonlinear Static Analysis Use nonlinear analysis, when at least one of the following conditions applies: a) The stress-strain relationship of the material is not linear. With static analysis, we can test the failure of many materials. Different materials fail at different stress levels. A material fails when the stress reaches a certain level. It calculates displacements, strains, stresses, and reaction forces. The body returns to its original position when loads are removed. It assumes linear material behavior and neglects inertia forces. Types of Analysis: Static or Stress Analysis This is the most common type of analysis. Types of Analyses static nonlinear buckling frequency (vibrations) thermal optimizationįluid flow analysis is performed in a different module, i.e. There could be hundreds of thousands or even millions of these equations. Next, the program assembles the equations into a large set of simultaneous algebraic equations. These equations relate the unknowns, for example displacements in stress analysis, to known material properties, restraints, and loads. Main Concept of Design Analysis SolidWorks Simulation writes the equations governing the behavior of each element taking into consideration its connectivity to other elements. These are called degrees of freedom (DOF). Tetrahedral Element The motion of each node is fully described by translations in the X, Y, and Z directions. The behavior of these elements is well-known under all possible support and load scenarios. The elements share common points called nodes. It subdivides the model into many small pieces of simple shapes called elements.ĬAD Model Subdivided into Small Pieces 10 Main Concept of Design Analysis The FEM replaces a complex problem by many simple problems. It is universally recognized as the preferred method of analysis. FEA is well-suited for computer implementation. It can be used to solve simple and complex problems. They make many assumptions and fail to solve most practical problems. Analytical solutions are only available for simple problems. Analysis using the FEM is called Finite Element Analysis (FEA) or Design Analysis. The Finite Element Method SolidWorks uses the Finite Element Method (FEM) to determine the vonMises stress at every point for a part under an applied loading condition. Von Mises stress design objective – at every point, keep the von Mises stress below the yield stress of the material Von Mises stress Von Mises defined a single value for the stress state at a point based on the six stress valuesĢ 2 1 2 3 2 2 2 x y x z y z xy xz yz 2 The stress state at any point can be described by 6 values: three normal stresses and three shear stressesĪn orientation can be found such that there are no shear stresses the normal stresses are called the principal stresses Static Stress Analysis The material we will cover today will be studied in detail in the courses: – EGM 3520, Mechanics of Materials – EML 4500, Finite Element Analysis and Design Image courtesy of National Optical Astronomy Observatory, operated by the Association of Universities for Research in Astronomy, under cooperative agreement with the National Science Foundation.
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