I am modelling an impact on a Ti64 block. The impacting particles are rigid and the Johnson-Cook material has been used for the block. How can I include SPH deletion?
I set EFMIN to 0.14; however, in post-processing, it is seen that the effective plastic strain for some SPH nodes is higher than EFMIN, but the nodes are still there and they do not erode. What is the problem here? I even defined the strain failure criterion in ADD_EROSION, but the same problem exists.
As far as i know eroded SPH particles don't interact with the kernels of other particles anymore so they are kind of deactivated.
However they are not deleted like regular elements so you don't lose any internal or kinetic energy.
Joshua Mullins Gino Mathlouthi Hi, first of all thanks for your answers, they really helped me to better understand the fundamentals of the software. Actually I am the person who asked the question. However, now I am wondering how to calculate erosion; I want to analyze the effect of impact angle, and I know it from experiments, where the erosion increases as the angle increases and reaches a peak in around 40 degrees and then it begins to decrease as the angle increases. But, using SPH, it just increases and reaches its peak around 90 degrees; as a matter of fact it is treated like a brittle material rather than a ductile matterial. I use vol fail in post processing to calculate erosion, giving the Effective plastic strain a threshold of 0.14.
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