# MBU - Methods of Solving Problems

MigrationCheck-Methods of Solving Problems

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Consider the situation where the "Indenter” is pushed into the elastomer 0.8 mm (instead of 2 mm) while everything else remains the same. (Do not set up and solve such a simulation.) What is the maximum equivalent stress in the Elastomeric Sample when the Indenter is pushed 0.8 mm? Review all options below and select the best option that is closest to the correct answer.

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Consider the situation where the "Indenter” is pushed into the elastomer 4 mm (instead of 2 mm) while everything else remains the same. (Do not set up and solve such a simulation.) How much force in the Y-direction is required to push the Indenter 4 mm into the Elastomeric Sample? Review all options below and select the best option that is a correct statement.

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Intermediate results are available in this simulation. If you review results at “Display Time: 0.6 s”, what does this represent? Review all options below and select the best option that is correct.

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In Engineering Data, compare the “Structural Steel” and “Elastomer Sample (Reference)” material properties. How many times larger is the shear modulus of Steel compared with the initial shear modulus of the elastomer sample? Select the option that is closest to the correct answer.

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Consider the situation where the "Indenter” is pushed into the elastomer 0.4 mm (instead of 2 mm) while everything else remains the same. (Do not set up and solve such a simulation.) How much force in the Y-direction is required to push the Indenter 0.4 mm into the Elastomeric Sample? Review all options below and select the best option that is closest to the correct answer.

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What is the reaction force in the X-direction for the Displacement support along the centerline? The centerline (the center edge that is constrained with a Displacement Support in the X-direction) is highlighted in the figure below:

Select the option that is closest to the correct answer.

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Consider the case where the "Structural Steel” linear elastic material has a Young’s modulus that is twice its current value, and everything else remains the same. (Do not set up and solve such a simulation.) Review all options below and select the best option that is correct.

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Consider the case where the "Elastomer Sample” hyperelastic material has an initial shear modulus that is twice its current value, and everything else remains the same. (Do not set up and solve such a simulation.) Review all options below and select the best option that is correct.

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What is the maximum equivalent elastic strain in the elastomeric sample at the end of the simulation? Select the option that is closest to the correct answer.

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What is the maximum equivalent stress in the elastomeric sample at the end of the simulation? Select the option that is closest to the correct answer.

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As the indenter is pushed into the elastomer, some of the elastomer material is pushed out radially. What is the maximum deformation in the X-direction at the end of the simulation? Select the option that is closest to the correct answer.

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Review the reaction force at the end of the simulation. What is the magnitude of force in the Y-direction that is required to push the steel indenter 2 mm into the elastomeric sample? Select the option that is closest to the correct answer.

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In Engineering Data, review the test data used for curve-fitting of the “Elastomer Sample”. Then, review all options and select 2 correct statements below:

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The material incompressibility parameter of the “Elastomer Sample” hyperelastic material is 0 $MPa^{-1}$. What does this signify? Review all options and select the best answer.

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What is the initial shear modulus of the “Elastomer Sample” hyperelastic material? Select the option that is closest to the correct answer. (Hint: review information in Engineering Data.)

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Review the Reaction Forces at the Fixed Support for this model. Select the option below that is a correct statement.

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The model has a Force applied on the free end with 100 N acting in each of the X, Y, and Z directions. Select the option below that is a correct statement.

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The analysis used a damping ratio of 1%. If the damping ratio were increased to 5%, select the best option that describes the Total Deformation response.

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The applied force is not sinusoidal, but the Total Deformation response is oscillatory. Select the best option that explains why this happens.

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Without modifying and resolving the model, a change in plate thickness has what effect on modal analysis results? Select the best option.

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Without modifying and solving the model again, consider an increase in the plate thickness. Select the best option that describes what happens to the Total Deformation response.

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Without modifying and solving the model again, consider changing the material to one with twice the current mass density (geometry, loads, and all other material properties remain unchanged). Select the best option that describes what happens with this new density to the Total Deformation response.

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Before performing the Mode Superposition Analysis, which of the following is always useful to perform? Select the best, most practical option.

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Without solving the model, what will the maximum directional deformation in the Y-direction be if the applied force in the Y-direction is -200 N? Assume that forces in the X- and Z-directions remain unchanged. Select the best option.

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If both ends of the cantilever are fixed, and the force is applied at the center, which one of the following statements is correct?

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Looking at the plot of maximum Total Deformation, which one of the following statements is correct?

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When determining the transient results using the mode-superposition method, which modes are used by the solver in its calculations? Select the best option.

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If only three modes are used to calculate the maximum total deformation, then which mode shapes would provide the most accurate results? Select the best option.

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What is the maximum deformation seen during the transient analysis? Select the closest option.

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Consider the case where the Y-direction force in System A has been changed from -200 N to -1 N with everything else remaining the same. (Do not set up and run a new simulation.) What will the newly-calculated load multiplier for the first buckling mode be in System B? Review all options below and select the correct answer.

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Consider the case where the Y-direction force in System A has been changed from -200 N to -400 N with everything else remaining the same. (Do not set up and run a new simulation.) What will the newly-calculated load multiplier for the first buckling mode be in System B? Review all options below and select the correct answer.

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Review the results in System A (“Static Structural”) and System B (“Eigenvalue Buckling”). Review all options below and select the correct statement.

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For the simulation exercise performed, consider all options below, and select the option that is correct.

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Review all 6 buckling modes of System B (“Eigenvalue Buckling”) and the image below:

Review all options below and select the correct statement.

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Review all 6 buckling modes of System B (“Eigenvalue Buckling”) and the image below:

Review all options below and select the correct statement.

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Review all 6 buckling modes of System B (“Eigenvalue Buckling”) and the image below:

Review all options below and select the correct statement.

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Review System A (“Static Structural”) and System B (“Eigenvalue Buckling”). Based on the eigenvalue buckling analysis results, what is the total amount of applied force that is expected to initiate the second buckling mode? Select the option that is closest to the correct answer.

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Review System A (“Static Structural”) and System B (“Eigenvalue Buckling”). Based on the eigenvalue buckling analysis results, what is the total amount of applied force that is expected to initiate the first buckling mode? Select the option that is closest to the correct answer.

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Review the first two buckling modes in System B (“Eigenvalue Buckling”). Review all options below and select the correct statement.

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What is the load multiplier for the second buckling mode (System B)? Select the option that is closest to the correct simulation results.

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What is the load multiplier for the first buckling mode (System B)? Select the option that is closest to the correct simulation results.

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In “Static Structural” System A, what is the deformation in the Z-direction? Select the option that is closest to the correct simulation results.

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In “Static Structural” System A, what is the deformation in the Y-direction? Select the option that is closest to the correct simulation results.

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In “Static Structural” System A, what is the deformation in the X-direction? Select the option that is closest to the correct simulation results.

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Which key material characteristic is necessary for the proper use of equibiaxial tension and planar shear testing? Select the best option.

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Which result best represents a mixed mode of deformation? Select the best option.

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Which test generates the most accurate characterization of pure shear in a fully incompressible elastomer? Select the best option.

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In the hyperelastic strain energy equations, as the parameter d (which is inversely proportional to the initial bulk modulus) decreases, the material tends to become _____. Select the best option.

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The "d" parameter in the Mooney-Rivlin Strain Energy expression $\Psi =C_{10}(I_{1}-3)+C_{01}(I_{2}-3)+\frac{1}{d}(J-1)^2$ is inversely proportional to _____.

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Which statement best characterizes the strain energy function of a highly nonlinear, highly compressible foam material? Select the best option.