# Simulation Quiz 3

### Contact Between Two Blocks

Contact interaction between parts needs to be considered in most engineering designs, and the effects of friction can also play an important role.  In this simulation exercise, we will look at a simple problem of a block being pressed against a base, then moved a certain distance while maintaining the compression.

Follow instructions to set up the simulation and get results BEFORE starting the quiz. Download the instructions and necessary simulation files from here.

Note: The Expected Completion Time for this quiz is 20 mins but, the Maximum Available Time to complete the quiz is 45 mins.

#### Total Number of Questions - 15

Times up!

Capturing Complex Response of Structures - Simulation Quiz 3

Complete the simulation and have all the results ready BEFORE starting the quiz.

Once you have finished the exam, click on the 'Mark Complete' button to save your progress and move to the next section.

1 / 15

Review the contact status and the reaction force probes at the end of the simulation (Step 2, time=2). Review the options below and select two correct statements.

2 / 15

Consider a separate situation where the coefficient of friction is increased to 0.4. (Do not re-run such a simulation.) What change is expected to occur in the reaction force in the x-direction (tangential direction) at the end of Step 2?

3 / 15

Review the frictional stress contact results at the end of Step 2 (time=2). Review all options, and select the option that is correct.

4 / 15

Review contact status results for this simulation for Step 1 (time=1) and Step 2 (time=2). Select the two correct options below:

5 / 15

Review the contact penetration results at the end of Step 2 (time=2). Select the option that is closest to the maximum penetration reported.

6 / 15

What is the maximum equivalent stress experienced in the “Base” part at the end of Step 1 (time=1)? Select the option that is closest to the value you obtained.

7 / 15

Review the contact results at the end of Step 1 (time=1), including contact pressure and frictional stress. Review all options, and select the option that is correct.

8 / 15

What is the maximum equivalent stress experienced in the entire model at the end of Step 2 (time=2)? Select the option that is closest to the value you obtained.

9 / 15

What is the magnitude of force needed to push the smaller block along the base during Step 2 (time=2)? Select the option that is closest to the value you obtained. (Hint: review the reaction force in the x-direction)

10 / 15

Consider a separate situation where the coefficient of friction is increased to 0.4. (Do not re-run such a simulation.) What change is expected to occur in the reaction force in the y-direction (normal direction) at the end of Step 2?

11 / 15

Consider a separate situation where the coefficient of friction is decreased to 0.0. (Do not re-run such a simulation.) What change is expected to occur in the reaction force in the x-direction (tangential direction) at the end of Step 2?

12 / 15

What is the magnitude of force needed to keep the two blocks compressed together after Step 1 (time=1)? Select the option that is closest to the value you obtained. (Hint: review the reaction force in the y-direction)

13 / 15

Consider a separate situation where the coefficient of friction is decreased to 0.0. (Do not re-run such a simulation.) What change is expected to occur in the reaction force in the y-direction (normal direction) at the end of Step 2?

14 / 15

What is the maximum equivalent stress experienced in the entire model at the end of Step 1 (time=1)? Select the option that is closest to the value you obtained.

15 / 15

Consider a separate situation where the coefficient of friction is increased to 0.4. (Do not re-run such a simulation.) What change is expected to occur in the maximum frictional stress in the contact region at the end of Step 2?