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CAE EXAM 1 2026 LATEST
QUESTIONS AND ANSWERS| ACE
YOUR GRADES.
When do you use a "dynamic symulation" - correct answer -
when you include the following dynamic effects:
-when the bodies move fast, inertia effect and damping effect
[star] Name 3 Different types of nonlinearities in finite elements +
examples - correct answer -1. Geometric [fishing pole effect;
weight on the fishing pole and the distance between our hand and
the weight gets shorter.]
2.Material [Entire stress-strain curve]
3.Contact (can be linear or nonlinear) [a hinge pin, free to rotate]
Modal Analysis - correct answer -Also called free vibration
analysis. It is a special case of dynamic analysis, in which the
structure is free of external forces. The results of the analysis
include natural frequencies and their corresponding vibration
modes.
, Page | 2
Structural nonlinearities - correct answer -when the relationship
between the applied loads and the resulting deformation and
stress is not proportional, nonlinearities may be present.
Engineering simulation - correct answer -Finding the responses
of a problem domain subject to environmental conditions
Structural simulation - correct answer -finding the responses of
bodies subject to environmental conditions.
What are some environmental conditions to be aware of when
creating a structural simulation? - correct answer -The bodies
are described by geometries and materials.
Environment conditions include supports and loading conditions.
Responses can be described by displacements, strains, or
stresses.
How many total structural Mechanics Governing equations are
there and What are the structural Mechanics Governing
equations? - correct answer -there is a total of 15 structural
Mechanics Governing equations.
-3 Equilibrium equations (Fx, Fy, Fz)
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-6 Strain-Displacement Relations (epsilon x,y,z and gamma
xy,yz,zx)
-6 Stress-strain Relations (Hook's law)
[star] How do we define failure for a ductile material:
How do we define failure for a brittle material: - correct answer -
we define failure for a ductile material at the Yield point.
We define failure for a brittle material at fracture point
Failure of a 'Brittle Material' - correct answer -Failure = Tensile
Failure• (Tensile stress [𝜎1] ≥ Fracture Strength
• Max Principal Failure criterion
• 'Min Principal Failure' may exist for materials under compressive
loading (glass)
Failure of a 'Ductile Material' - correct answer -Tresca failure
Failure = Shear Dominated Failure• (Max Shear stress [𝜏] ≥ Shear
Strength• Max Shear (Tresca) Failure criterion
How does tresca failure vary for 2D vs 3D stress state? - correct
answer -For a 2D Tresca failure system a 2X2 matrix is required,
CAE EXAM 1 2026 LATEST
QUESTIONS AND ANSWERS| ACE
YOUR GRADES.
When do you use a "dynamic symulation" - correct answer -
when you include the following dynamic effects:
-when the bodies move fast, inertia effect and damping effect
[star] Name 3 Different types of nonlinearities in finite elements +
examples - correct answer -1. Geometric [fishing pole effect;
weight on the fishing pole and the distance between our hand and
the weight gets shorter.]
2.Material [Entire stress-strain curve]
3.Contact (can be linear or nonlinear) [a hinge pin, free to rotate]
Modal Analysis - correct answer -Also called free vibration
analysis. It is a special case of dynamic analysis, in which the
structure is free of external forces. The results of the analysis
include natural frequencies and their corresponding vibration
modes.
, Page | 2
Structural nonlinearities - correct answer -when the relationship
between the applied loads and the resulting deformation and
stress is not proportional, nonlinearities may be present.
Engineering simulation - correct answer -Finding the responses
of a problem domain subject to environmental conditions
Structural simulation - correct answer -finding the responses of
bodies subject to environmental conditions.
What are some environmental conditions to be aware of when
creating a structural simulation? - correct answer -The bodies
are described by geometries and materials.
Environment conditions include supports and loading conditions.
Responses can be described by displacements, strains, or
stresses.
How many total structural Mechanics Governing equations are
there and What are the structural Mechanics Governing
equations? - correct answer -there is a total of 15 structural
Mechanics Governing equations.
-3 Equilibrium equations (Fx, Fy, Fz)
, Page | 3
-6 Strain-Displacement Relations (epsilon x,y,z and gamma
xy,yz,zx)
-6 Stress-strain Relations (Hook's law)
[star] How do we define failure for a ductile material:
How do we define failure for a brittle material: - correct answer -
we define failure for a ductile material at the Yield point.
We define failure for a brittle material at fracture point
Failure of a 'Brittle Material' - correct answer -Failure = Tensile
Failure• (Tensile stress [𝜎1] ≥ Fracture Strength
• Max Principal Failure criterion
• 'Min Principal Failure' may exist for materials under compressive
loading (glass)
Failure of a 'Ductile Material' - correct answer -Tresca failure
Failure = Shear Dominated Failure• (Max Shear stress [𝜏] ≥ Shear
Strength• Max Shear (Tresca) Failure criterion
How does tresca failure vary for 2D vs 3D stress state? - correct
answer -For a 2D Tresca failure system a 2X2 matrix is required,
