Theory Quiz

Note: The Expected Completion Time for this quiz is 60 mins but, the Maximum Available Time to complete the quiz is 90 mins.

Total Available Time - 90 mins

Total Number of Questions - 45

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Methods of Solving Problems in Structural Mechanics - Theory Quiz

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1 / 45

A structure that experiences _____ for a given load can still support that load without catastrophic failure. Select the best option to complete the sentence.

2 / 45

Flutter is a type of dynamic instability that occurs due to _____. Select the best option to complete the sentence.

3 / 45

The expression $x+iy = A(\cos{\varphi } +i\sin{\varphi})$ is described as _____. Select the best option.

4 / 45

When the stiffness matrix terms are functions of unknown DOFs, then which of the following is correct?

5 / 45

The Strain Energy Function can be represented as functions of which properties? Select the two best options.

6 / 45

To maintain numerical stability while using the explicit time integration method, the time-step size should satisfy the CFL condition, which is $\Delta t \leq f \left ( \frac{h}{c} \right )$. Which of the following statements are correct about the CFL condition? Select the two best options.

7 / 45

Which of the following statements about the implicit time integration method is correct? Select the best option.

8 / 45

Exciting a physical system at the natural frequency can occur, _____. Select the two best options.

9 / 45

Which is the best reason for using more terms in a hyperelastic model? Select the best option.

10 / 45

Local buckling due to weight is noticed along a section of the wall of a large, axisymmetric oil storage tank. You are asked to reproduce the buckling scenario via finite element simulation. Among the options listed, which type of analysis would be best for completing this task?

11 / 45

What are the benefits to treating some parts as a rigid body in a large assembly? Select the two best options.

12 / 45

Which of the following statements is relevant to using a full method in a harmonic analysis? Select the best option.

13 / 45

What are the types of analyses that need time integration method to solve? Select the best option.

14 / 45

Engine vibration mounts serve to _____. Select the best option.

15 / 45

Which analyses employ the linear combination of modes? Select the three best options.

16 / 45

A structure is deemed unstable when _____. Select the best option to complete the sentence.

17 / 45

In the mode superposition method, which statements are the most correct. Select the two best options.

18 / 45

Stress developed in a hyperelastic material is calculated from _____. Select the best option.

19 / 45

The mode superposition method is _____. Select the best option.

20 / 45

Which of the following is correct regarding the Newton Raphson Method? Select the best option.

21 / 45

Which of the following is correct regarding the first estimate of stiffness when using the Newton Raphson method? Select the best option.

22 / 45

Force convergence failure for a Newton Raphson method indicates _____. Select the best option.

23 / 45

Which of the following is correct for running an Ansys Simulation? Select the best option.

24 / 45

When considering eigenvalue buckling analysis, why is the point on force-displacement curve at which a structure undergoes buckling called a bifurcation point? Select the best option.

25 / 45

For a response spectrum analysis, the mode superposition method is _____. Select the best option.

26 / 45

Most ductile metals under a structural load undergo elastic deformation for strain ranges up to _____. Select the best option.

27 / 45

Rubbers, elastomers and soft tissues are typically _____. Select the best option.

28 / 45

If an eigenvalue buckling analysis predicts a load multiplier factor of 300, what conclusion can be drawn from the simulation? Select two best options that are correct.

29 / 45

Which of the following options have the preferred choice of implicit or explicit method for the respective applications? Select the two best options.

30 / 45

A complex variable typically illustrates that a function has a _____. Select the best option.

31 / 45

The imposed circular frequency in a harmonic analysis is represented by which of the following formulas.

32 / 45

Which material model is the simplest form of a hyperelastic strain energy density function? Select the best option.

33 / 45

Simulation of buckling that is induced by local delamination (failure due to layer separation) requires _____. Select the best option to complete the sentence.

34 / 45

Two analysts solve the same dynamic analysis of a large model. One of them changes the solution method to mode superposition (with no other differences in the analysis). The analysts find that there is a significant time difference between them to solve the models. Which of the following statements is correct in regards to his scenario? Select the best option.

35 / 45

Bending of a fishing rod shows non-linear behavior because _____. Select the best option.

36 / 45

Which of the following statement is relevant to using the mode superposition method in a harmonic analysis? Select the best option.

37 / 45

What characteristics do hyperelastic materials have in common with linear elastic materials? Select the two best options.

38 / 45

Which of the following statements regarding mass scaling in an explicit dynamic analysis are correct? Select the two best options.

39 / 45

For a fully incompressible hyperelastic material, the strain energy function is usually expressed _____. Select the best option.

40 / 45

Why is the time integration method needed for solving a transient dynamic analysis? Select the two best options.

41 / 45

Which of the following is true regarding the mode superposition transient method. Select the two best options.

42 / 45

Which statements describe the phase angle in a harmonic analysis? Select the two best options.

43 / 45

In a particular jet engine, the turbine blades are not perfectly balanced on the spin axis of the shaft. Choose the statement which describes the cause and effect of this imbalance with a turbine assembly that is in-service. Select the best option.

44 / 45

Which method is used to calculate the scalar equivalent for force used to check for convergence? Select the best option.

45 / 45

Dynamic instabilities occur due to _____. Select the best option to complete the sentence.

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