Numerically Accurate Results

Specifying an Appropriate Element Size for Stress Analysis — Lesson 1

Understanding the Importance of 3D Element Shapes and Order — Lesson 2

Understanding and Dealing with Artificially High Stresses — Lesson 3

Obtaining Accurate Stress Using Surface Coating — Lesson 4

Using Adaptive Convergence with Ansys Mechanical — Lesson 5

Performing Submodeling in Ansys Mechanical — Lesson 6

Practice Quiz and Simulation Exercise

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Course Assessment - Numerically Accurate Results

Simulation Exercise - Numerically Accurate Results

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Course Assessment - Numerically Accurate Results

Numerically Accurate Results Practice Quiz and Simulation Exercise Course Assessment - Numerically Accurate Results

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Question 1 of 10

1. Question
While performing a linear stress analysis, any region of our model is considered to have a sufficient mesh density if the _____. Select the best option that completes the statement.
- Averaged Stress > Unaveraged Stress
- Averaged Stress ~= Unaveraged Stress
- Averaged Stress < Unaveraged Stress
- Averaged Stress >> Unaveraged Stress
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Question 2 of 10

2. Question
In Ansys Mechanical, the _____ display option provides the maximum difference between the unaveraged computed result for all elements that share a particular node. Select the best option that completes the statement.
- Elemental Difference
- Elemental Mean
- Nodal Fraction
- Nodal Difference
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Question 3 of 10

3. Question
What are the default element types generated by Ansys Mechanical when meshing 3D solid bodies? Select the 3 best options that are correct.
- Quadratic elements with midside nodes.
- For sweepable bodies, a mesh dominated by hexahedral elements is generated.
- Linear elements without midside nodes.
- For complicated geometries, Ansys Mechanical generates a mesh with tetrahedral elements.
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Question 4 of 10

4. Question
Which of the following options will help to reduce artificially high stresses? Choose the two best possible options.
- Application of point load on a node
- Use of fillets at critical corners
- Constraining an edge
- Application of a force on an area
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Question 5 of 10

5. Question
Assume that we have a geometry with no re-entrant corners. Artificially high stresses are usually seen in the cases where the model is _____. Select the best option to complete the sentence.
- under-constrained
- well-constrained
- over-constrained
- constrained by weak springs
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Question 6 of 10

6. Question
When is the use of surface coating with "Stiffness Behavior: Stress Evaluation Only" most effective? Select the best option.
- Model with an extremely fine mesh
- Model with complicated boundary conditions and material assignments
- Model with a coarse mesh in the direction normal to the surface
- Model with a real-life thin coating on the exterior
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Question 7 of 10

7. Question
In Ansys Mechanical, which of the following statements are TRUE regarding the Adaptive Convergence? Select the best two options.
- Adaptive Convergence solves a model multiple times, strategically refining the mesh in each iteration.
- Adaptive Convergence solves a nonlinear problem iteratively by converging and minimizing the unbalanced forces.
- Adaptive Convergence is performed by the solver after the user specifies the criterion.
- Adaptive Convergence is automatically performed by the solver after any linear analysis.
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Question 8 of 10

8. Question
When using Adaptive Convergence, the option ___________ decides how aggressive each mesh refinement should be. Select the best option that completes the statement.
- Maximum Refinement Loops
- Allowable Change
- Refinement Depth
- Element Order
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Question 9 of 10

9. Question
Consider the following case where a user has two Static Structural systems in Mechanical. To use the Submodeling feature, the user connects the Solution cell of the 1st system to the Setup cell of the 2nd system. In the 2nd system, an Imported Cut Boundary Constraint object appears. What is the purpose of the Imported Cut Boundary Constraint? Select the best option.
- This will ensure that the models in both Static Structural systems are meshed similarly.
- This will ensure that same boundary conditions are applied on the models of both Static Structural systems.
- This will map the displacements from the 1st Static Structural system onto the new mesh of the 2nd Static Structural system.
- This will map any applied displacements from the 1st Static Structural system. However, if there are only force or pressure loads in the 1st Static Structural system, the Imported Cut Boundary Constraint should be suppressed.
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Question 10 of 10

10. Question
For which of the following scenarios should the Submodeling approach be used? Select the 2 best options.
- A small hook constrained at the base and carrying a load of 1000 N.
- A large wind turbine having small features and intricate details at the wings, which needs to be analyzed in detail without being too computationally expensive.
- A boiler used in a thermal power plant that requires a thermal analysis to obtain accurate thermal gradients in multiple locations.
- A cantilever beam carrying a uniform distributed load along its top length and a moment at the free end of the beam.
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