×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Explicit Dynamic

Explicit Dynamic

Explicit Dynamic

(OP)
Could anybody tell me briefly what is explicit dynamic?

Thanks.


RE: Explicit Dynamic

Dear friend:

Explicit method is a numerical tool based on finite difference method for solving the set of equilibrium equations governing the engineering response of a structure under dynamic exicitation (particularly impact load of short time duration  like "Blasting load")It is superior to other tools(implict or modal superposition) when your system is rich in high natural frequencies and when you have large number of DOFS.

Regards,
BASSAM
 

RE: Explicit Dynamic

Further it may be of advantage to use an explicit dynamics code  if you´re dealing with large deformations, complicated contact  problems - high nonlinearities. In this highly nonlinear cases extremely small time steps respectively load steps are needed if you use a `standard fe code` so that the computational expense is very high. Also convergence is hard to achieve, as either the matrices are bad conditioned or the contact region changes within the iterations necessary for nonlinear solution methods. Then the standard Newton type methods loose their capability of quadratic convergence with rather large load steps.
Even so this is not the main task of this codes as their superior field is as mentioned above the field of short time impacts like crash tests....

regards
Sebastian

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources