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Split Hopkinson Pressure bar simulation using Abaqus
Hello everyone, I am testing a bio degradable material for bone implants. I have to test its "Dynamic Imact behaviour" using "Split Hopkinson Pressure bar", I have done the experiment and have the results. Now I need to simulate the same using "Abaqus 6.7". I have meshed the parts, i.e the incident bar which hits the specimen, the specimen and the transmitter bar using HEX elemnts and I have around 100,000 elements in the simulation. I have applied proper boundary conditions and material properties and step conditions.. But I end up with a warning and the simulation doesnt run as it has to.. the warning i get is..
WARNING: THE ANALYSIS MAY NEED LARGE NUMBER OF INCREMENTS(MORE THAN 300000), AND IT MAY BE AFFECTED BY ROUND OFF ERRORS. RUNNING THE DOUBLE PRECESION EXECUTABLE IS RECOMMENDED
If anyone can understand the issue and let me know the right way I would be thankful.
I have attached an image of the setup if in case...
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 SHPB.jpg | 32.65 KB |
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You can reduce the total
You can reduce the total number of time increments by increasing the 'value of *DENSITY' artificially. This technique, so called the mass scalling,
can be referred from the ABAQUS manual.
Oh thanks..!! But I ran the
Oh thanks..!! But I ran the double precision executable and got the problem was solved... I dint used the Mass scaling because it may change the properties of the material.. and the result at the end....