# 48

Preguntas de entrevista para Fea Engineer compartidas por los candidatos

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A un Fea Engineer le preguntaron...22 de septiembre de 2017

### When modeling rubber like material in explicit FEA, you can't set Poisson's ratio as 0.5. Why? What would happen in the solver if you do that? I noted that it leads to an infinity in the stiffness matrix but he wanted more details.

2 respuestas

Velocity @n+1/2 and disp @n+1 after calculating accelerations at nth time

How does explicit FEA solve governing equations? and what does this solve for? Told him that it solves for accelerations and then computes damping and displacement in next timesteps.... Menos

### How to improve the permanent displacement of the connector

1 respuestas

lower the length of the pin and change to a harder material

### I was asked to perform Impact force computation and related justifications.

1 respuestas

It was a written exam, followed by actual tool-test. One need to be little prepared to answer these questions. Menos

### Do you know vibration?

1 respuestas

Yes, I took the course in my undergraduate education. But most of my experience is in aerospace static stress analysis. I'm assuming you would have a good documentation there for new starters in automotive. (they literally didn't have anything to study &amp; etc.) Menos

### Write down some FE equations?

1 respuestas

I remember from my engineering and answered

### What properties determine the natural frequency of a simple system (a mass point on a spring), and which way?

1 respuestas

Stiffness, which is related to the material and shape of the spring. The greater the stiffness, the higher the frequencies. Mass. The greater the mass, the lower the frequencies. Omega = sqrt(k/m). Menos

### What is Reynolds number and range of Reynolds number

1 respuestas

Reynolds number is inertia force to viscous force. Range is for laminar less 2000, for transition 2000 to 4000 and for turbulent more than 4000 for pipe flow Menos

### What type of analysis have you done so far?

1 respuestas

Explained types with example s

1 respuestas

Confidential

### All on SOM

1 respuestas

Not satisfied from my answer as I was not fully prepared.

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