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46 questions

Illustrated below are the stress and displacement results of a linear static study performed on a mild steel clip. Mild steel has a yield strength of 207MPa and an Ultimate Tensile Strength of 345MPa. What conclusion can be made with certainty from this simulation?

(Select one)

The part will deflect at most 0.5729mm.
The part will fracture and break.
The part will return to its normal shape when the load is released.
The part will deform plastically and perhaps fracture and break.

Select an answer

A design subject to a fixed load is recalculated using various materials. Increasing which material property below will result in smaller deflection?

(Select one)

Yield Strength
Young’s Modulus
Poisson’s ratio
Density

Select an answer

An assembly consisting of many parts of different materials is subject to a load. After undergoing a linear static stress analysis, an analyst wishes to determine if plastic deformation occurs in any of the parts. Which metric would be most efficient in determining if plastic deformation is occurring in any of the parts?

(Select one)

Displacement
Strain
Safety factor
Von Mises Stress

Select an answer

A hole in a design has a rod inserted into it. The rod is then pulled radially, acting on the inner surface of the hole. Which of the following is the most suitable Structural Load to simulate the approximate stress in the hole because of the rod?

(Select one)

Bearing Load
Force
Remote Force
Pressure

Select an answer

Which of the following statements regarding the Simplify tool is false?

(Select one)

The Simplify tool cannot be used to add complexity or features.
The Simplify tool can replace geometries with primitives, such as boxes, cylinders, and spheres.
The Simplify tool creates a substitute model without modifying the design’s original model.
The Simplify tool can delete faces, and automatically heal the remaining geometry.

Select an answer

A design includes two faces angled 135 degrees from one another. A single Force load is applied to both faces. Which of the following statements is false?

(Select one)

When the direction type is specified as Normal, the force on both faces acts in the direction normal to the first face selected.
When the direction type is specified as Normal, the force on both faces act normal to each face.
If the Force Per Entity option is not enabled, the Force is distributed across each face in proportion to their relative areas.
Once OK is clicked, two separate Force loads will be created, each capturing a single face.

Select an answer

A brake pad is to be analyzed under use. What factor may prevent the effective use of linear-static analysis in this case?

(Select one)

This would qualify as a dynamic scenario, and cannot be calculated with linear static analysis.
As brakes are used, significant heat is produced; the effect of heat on the components is not considered in linear-static analysis.
The rotation of the disc cannot be accounted for in a linear-static study.
The load transmitted through the brake pads may exceed the yield strength of the brake pads and/or disc.

Select an answer

For the study illustrated below, which constraint would be most suitable to allow the hammer to rotate about its axis?

(Select one)

A pin constraint, with the tangential degree of freedom unlocked and the radial degree of freedom locked.
A pin constraint, with the tangential degree of freedom locked and the radial degree of freedom unlocked.
A frictionless constraint.
A fixed constraint, with rotation about Z unlocked.

Select an answer

For a component that is to undergo an iterative loop of simulations and design changes, what is the key benefit to model simplification?

(Select one)

Easier post-processing of results
Smaller file size
More accurate results
Quicker meshing and processing, owing to a simpler mesh

Select an answer

For a linear-static analysis, the Pre-Check tool has returned: “Some components are using a material with invalid properties. Which of the following options is not a valid approach to reconciling this error?

(Select one)

Assign another material to the components.
Change the Safety Factor metric from Yield Strength to Ultimate Tensile Strength.
Edit the material assigned to the components, and ensure that all material properties relevant to linear-static analysis are populated.
Changing the Study Type to Nonlinear Static Analysis.

Select an answer

The Pre-Check tool has returned, “Warning: Missing Gravity while Point Mass is defined in load case “Load Case 1”.” Which of the following options is not a valid approach to reconciling this warning?

(Select one)

Replacing the Point Mass with an equivalent Remote Force.
Enabling Gravity in the model.
Replacing the Point Mass with actual geometry, and enabling Gravity.
Removing the Point Mass.

Select an answer

A linear static analysis has been computed for a design. Which metric below would correspond to the maximum tensile stress experienced throughout the design?

(Select one)

1st Principal Stress
Strain
Von Mises Stress
3rd Principal Stress

Select an answer

A small frame consisting of natural wooden planks bolted together requires analysis. What is the most serious concern when performing a linear-static stress analysis on such a frame?

Select up to undefined

Such a frame may deflect significantly under load,
Fusion 360 Simulation cannot simulate the effect of bolted connections on assembly components,
Fusion 360 Simulation cannot simulate assemblies of parts,
Natural woods are complex, nonlinear, anisotropic materials, with material properties and conditions that may be difficult to analyze.

Select an answer

Adaptive mesh refinement is an automated way to apply local mesh refinements. Specifically, the Adaptive Mesh Refinement Tool operates how?

(Select one)

By solving a simulation using a coarse starting mesh, then automatically repeating the simulation several times more, in each iteration refining the mesh locally where it is required.
By enabling the mesh to recompute itself at various stages of load application in a linear static analysis.
By automatically applying local mesh refinements to areas where high stress and/or deflection is predicted before the simulation is started.
By allowing the user to specify different global mesh settings to different volumes of the design.

Select an answer

A design includes a connection point somewhere along its body. Specifications require that, under load, the position of this connection point cannot deviate more than 2mm from its starting position. Assuming that the connection point is not in the region of maximum deflection for the design, how could an analyst determine whether or not it is within specification?

(Select one)

Use a slice plane to see a section of the connection point.
Place a probe at the connection point, read the Displacement, and ensure it is less than 2mm.
Read the Maximum Displacement from the legend, and ensure it is less than 2mm.
Change the model’s deformation style to ‘Actual’ and judge by eye.

Select an answer

A highly flexible fishing rod requires stress analysis. Which of the following statements is true?

(Select one)

A linear-static analysis is unsuitable for this purpose as the fishing rod’s circular cross-section will prevent the creation of a suitable mesh.
A linear-static stress analysis is unsuitable for this purpose as very large deflections are expected.
A linear-static analysis is suitable for this purpose, but the option ‘”Remove Rigid Body Modes” must be enabled.
A linear-static analysis is suitable for this purpose, but a very fine mesh must be used.

Select an answer

Which of the following global mesh configurations is likely to produce the most accurate results, assuming that there are no stress singularities?

(Select one)

Element Order = Parabolic, Curved Elements Enabled, Absolute Mesh Size = 2mm
Element Order = Parabolic, Curved Elements Enabled, Absolute Mesh Size = 4mm
Element Order = Linear, Absolute Mesh Size = 2mm
Element Order = Parabolic, Curved Elements Disabled, Absolute Mesh Size = 2mm

Select an answer

The Pre-Check tool has returned the message, “The study setup has all the information required.” Even though this is a green-light, what issues may become apparent after the simulation is complete?

(Select one)

Insufficient material property definitions, resulting in unreliable stress results.
Insufficient Loads, resulting in an unstressed design.
Insufficient contacts, resulting in unconstrained bodies.
Insufficient Constraints, resulting in rotational rigid body modes.

Select an answer

A design is accelerating horizontally at 5m/s2. What is the best way to simulate this loading?

(Select one)

Being uniformly distributed, acceleration does not produce a net load; therefore, it does not need to be considered.
Redefine gravity to run parallel to the horizontal plane, and alter its magnitude to 5m/s2.
Perform hand calculations to work out the effective force imparted to the design by acceleration, and apply this load uniformly to all surfaces in the design.
Apply a linear global load, using vector notation to prescribe acceleration in the horizontal plane.

Select an answer

The simulation illustrated below consists of two forces in equilibrium, and no structural constraints. Without adding constraints, how can a user ensure this load case will compute?

(Select one)

Apply a nominal third force acting downwards to prevent motion in Y.
In the simulation’s settings, enable the Remove rigid body modes option.
It is not possible; translation in X, Y, and Z must be locked by at least one constraint in the study.
Apply a nominal linear global load acting downwards to prevent motion in Y.

Select an answer

A design is intended to undergo some yield, but not break. In the Study Materials dialog, what might an analyst define as the metric for Safety Factor?

(Select one)

Strain
Yield Strength
Ultimate Tensile Strength
Disable the Safety Factor calculation

Select an answer

Local mesh controls are being used in an analysis, greatly refining the mesh in areas of interest. Which of the following global mesh settings is most suitable for making the transition from course mesh to fine mesh more gradual?

(Select one)

Increasing the Max. Turn Angle on Curves (Deg.).
Decreasing the Max. Turn Angle on Curves (Deg.).
Increasing the Max. Adjacent Mesh Size Ratio.
Decreasing the Max. Adjacent Mesh Size Ratio.

Select an answer

An imported model consists of multiple surfaces. These surfaces almost enclose a volume but include small gaps near where their surfaces meet. Which tool can be used to repair these gaps?

(Select one)

The Stitch tool, with a sufficiently high value for the Tolerance setting.
The Reverse normal tool.
The Boundary Fill tool.
The Validate tool (only when Design History is not being captured).

Select an answer

A linear static study with a single Load Case is to be repeated using a variety of materials. How can an analyst complete these simulations while retaining the results of each?

(Select one)

Clone the first study as many times as required, assigning a different material for each clone.
Populate the Materials Matrix with alternative materials and enable the Study All option.
In post-processing, change the material from the Material drop-down.
Duplicate the Load Case as many times as required, and in each duplicate, specify a different material.

Select an answer

An assembly consists of two tubes. The tube of smaller diameter is nested coaxially within the tube of larger diameter; there exists only a small gap between the outer surface of the smaller tube and the inner surface of the larger tube. The inner tube can translate axially and rotate about its axis. Which of the following contacts is most suitable for this design?

(Select one)

A Rough contact between the smaller tube’s outer surface and the larger tube’s inner surface.
A Sliding contact between the smaller tube’s outer surface and the larger tube’s inner surface.
A Separation contact between the smaller tube’s inner surface and the larger tube’s outer surface.
A Bonded contact between the smaller tube’s outer surface and the larger tube’s inner surface.

Select an answer

When formulating a load case for a linear-static study, which of the following is the most suitable definition for the load applied?

(Select one)

The minimum load expected during normal use.
The maximum load expected during normal use.
The time-averaged load experienced during an impulse loading (normal use).
The average load expected during normal use.

Select an answer

Which constraint is most suitable for defining symmetry on a cut surface?

(Select one)

Remote
Prescribed displacement
Fixed, with translation in the perpendicular direction unlocked
Frictionless

Select an answer

Which material property below measures the stress at which a material will plastically deform?

(Select one)

Shear Strength
Yield Strength
Ultimate Tensile Strength
Shear Modulus

Select an answer

With regards to Structural Loads, what is the difference between using a Force Load and a Pressure Load?

(Select one)

A Force Load is always applied perpendicularly and uniformly to a surface.
A Force Load is concentrated at a point on the surface(s) to which it is applied.
A Pressure Load is always applied perpendicularly and uniformly to a surface.
A Pressure Load is applied perpendicularly to a surface and concentrated about a point on the surface to which it is applied.

Select an answer

A linear static study has returned a very high value for Von Mises stress, localized in a small region near a sharp internal corner. Mesh refinement appears to only increase this stress. What is the most likely cause of this scenario?

(Select one)

The region of high stress is too close to a fixed structural constraint.
The corner is a stress concentrator that has resulted in a stress singularity - a region of theoretically infinite stress.
A load applied somewhere in the model is being applied perpendicularly to one of the corner’s faces.
In the global mesh settings, parabolic elements were used instead of linear elements.

Select an answer

Which of the following statements describes what happens with regard to rough contacts created between two surfaces?

(Select one)

Allow the analyst to specify the friction between the two surfaces between the values of 1 and 2.
Allow the analyst to specify the friction between the two surfaces.
Instruct the solver to create a bonded contact between the surfaces within the Max Activation Distance.
Prevent the surfaces from sliding relative to one another or going through one another.

Select an answer

Illustrated below are the stress and displacement results for an aluminum design subject to torsion. The yield strength of this grade of aluminum is 275MPa. Assume the mesh is of sufficient quality. Which of the following statements is true?

(Select one)

Under cyclic loading, the part will fatigue and break quickly.
The part will deform elastically and return to its original shape when the load is removed.
The results cannot be trusted, as the peak stress occurs at a fillet. Remove the fillet and repeat the simulation for accurate results.
Under load, the part twists 0.04692 degrees.

Select an answer

An imported model consists of multiple surfaces. Together, these surfaces connect with no gaps or overlaps, and enclose a volume. Which tool would produce a solid model of the enclosed volume?

(Select one)

The Boundary Fill tool, on the Surface tab.
The Stitch tool, on the Surface tab.
The Combine tool, on the Solid tab.
The Extend tool, on the Surface tab.

Select an answer

Which of the following properties is not needed for a linear static study involving a gravitational load?

(Select one)

Young’s Modulus
Density
Yield Strength
Thermal Conductivity

Select an answer

A linear static solution has returned an extremely high value for Von Mises stress, localized in a small region near a sharp internal corner. An approximate value for the true stress in this corner is required. Which of the following is likely to produce a good approximate for the stress?

(Select one)

Refine the global mesh.
Make use of the Adaptive Mesh Refinement tool.
Retrieve values for the 1st and 3rd Principal stresses and perform hand calculations.
Create a very small internal fillet on the edge and capture its geometry with a local mesh refinement.

Select an answer

For the study illustrated, which constraint could replace the frictionless constraint used?

(Select one)

A Fixed Constraint, with translation in X, Y, and Z locked.
None of these choices are valid substitutes for the frictionless constraint.
A Fixed Constraint, with translation in X and Z unlocked, and translation in Y locked.
A Fixed Constraint, with translation in X and Z locked, and translation in Y unlocked.

Select an answer

A linear static analysis is conducted on a given design. There is significant deformation in the part, with peak deflection equal to approximately 10% of the original length. Which statement below is true?

(Select one)

If the deformation is predominantly in the direction of the net force, the stress and deflection results are likely to be accurate.
Stress and deflection results are likely to be accurate.
Running the analysis with a finer mesh will improve the accuracy of the results.
Due to the significant deformation of the mesh, the stress and deflection results are likely inaccurate.

Select an answer

The Pre-Check tool has returned, “Warning: Not enough structural constraints defined in Load Case “Load Case 1”.” What can be done to eliminate this issue?

(Select one)

Decrease the stiffness of the material used.
Ensure that each degree of freedom is locked by at least one constraint.
Ignore the warning; it is not a fatal error.
Apply balancing loads to prevent rigid body motion in the design.

Select an answer

An imported model consists of multiple surfaces. Together, these surfaces would connect with no gaps or overlaps, enclosing a volume; however, a single, large surface is missing. Which tool would be most suitable to recreate the missing surface?

(Select one)

The Extend tool, on the Surface tab.
The Patch tool, on the Surface tab.
The Extrude tool, on the Solid tab.
The Stitch tool, on the Surface tab.

Select an answer

A design is suspended by two pins. Which constraint would adequately capture this scenario?

(Select one)

Two pin structural constraints, applied to the inner surfaces of the pin holes.
Two fixed structural constraints, applied to the inner surfaces of the pin holes.
Two frictionless constraints, applied to the inner surfaces of the pin holes.
Two bolted connectors.

Select an answer

What is the easiest way to achieve a desired displacement on a given surface?

(Select one)

Perform hand calculations to determine the Remote Force Structural Load required to produce such a displacement.
Modify the part’s geometry.
Perform hand calculations to determine the Force Structural Load required to produce such a displacement.
Use a Prescribed Displacement Structural Constraint on the surface.

Select an answer

When collecting information for a linear-static study, which of the following are not required?

(Select one)

Material properties, including Yield Strength, Young’s Modulus, and Density.
The effective damping coefficient of the structure.
The loads applied to the design.
How the design is held in place.

Select an answer

A linear static analysis has been completed on a design. However, the stress results appear as illustrated below. What is a likely cause for these results?

(Select one)

These results are not showing stress, but instead strain.
There is an uncontrolled degree of freedom resulting in a rigid body mode.
The stress results are correct; the stress is just evenly distributed throughout the design.
The mesh was unsuitable for the analysis.

Select an answer

There exists a very high (but accurate) value for Von Mises stress in a large fillet. What modification is likely to decrease the stress in this region?

(Select one)

Increasing the radius of the fillet.
Decreasing the radius of the fillet.
Replacing the fillet with an equivalently sized chamfer.
Replacing the fillet with a sharp edge.

Select an answer

A shaft undergoes torsion. Which of the following loads would be used to specify this rotational load?

(Select one)

Angular Global Load
Bearing Load
Moment
Remote Moment

Select an answer

When importing models for stress analyses, what file types are most appropriate?

(Select one)

Solid models saved in a compatible format including, .STL, .mesh, .brep, and .3ds.
Mesh models saved in a compatible format, including .STEP, .iges, .obj, Fusion 360, or Inventor.
Solid models saved in a compatible format, including .STEP, .iges, .obj, Fusion 360, or Inventor.
Mesh models saved in a compatible format, including .STL, .mesh, .brep, and .3ds.

Select an answer

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