transient thermal fatigue analysis in asonika n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Transient thermal + fatigue analysis in ASONIKA PowerPoint Presentation
Download Presentation
Transient thermal + fatigue analysis in ASONIKA

Loading in 2 Seconds...

play fullscreen
1 / 17

Transient thermal + fatigue analysis in ASONIKA - PowerPoint PPT Presentation


  • 102 Views
  • Uploaded on

Transient thermal + fatigue analysis in ASONIKA. Specify a name for the project. Select 3d model to import. Quarter-symmetry model of PCB + BGA Package. Specify initial temperature for entire model (20 degrees C).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Transient thermal + fatigue analysis in ASONIKA' - irma


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
specify initial temperature for entire model 20 degrees c
Specify initial temperature for entire model (20 degrees C)

This temperature will be also used as reference temperature for thermal stress calculation

slide6
Select external surfaces and set the thermal condition:convection and radiation (from these surfaces) to the environment

Specify film coefficient, emissivity, view factor and ambient temperature values

surfaces with thermal conditions become meshed
Surfaces with thermal conditions become meshed

Symmetry planes should not have thermal conditions

for transient thermal analysis heat power source can be time dependent
For transient thermal analysis heat power source can be time dependent

Input heat power vs time curve.

In this example two thermal cycles are modeled. Time dependent heat power will cause cyclic temperatures and stresses. Cyclic thermal stresses are used for fatigue calculation

One thermal (heat power) cycle has range of 8-18 Watt (2-4.5 Watt for quarter symmetry model)

slide10
Set material properties for all parts of the modelFor solder balls the following parameters will be used:
set solution parameters
Set solution parameters

Specify the end time of the analysis, the time integration step and the number of thermal cycles contained in the solution interval

temperature time curve at nodes
Temperature – time curve at nodes

Two arbitrary nodes were selected

Temperature vs time curves for two nodes

stress time curve
Stress-time curve

Two arbitrary nodes were selected

Stress vs time curves for two nodes

fatigue plot
Fatigue plot

Plot shows minimum fatigue life (451.9 thermal cycles) in solder balls