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ALE mesh for JWL blast model. Abaqus error "Excessive Distortion" and "Zero ALE Mass&

ALE mesh for JWL blast model. Abaqus error "Excessive Distortion" and "Zero ALE Mass&

ALE mesh for JWL blast model. Abaqus error "Excessive Distortion" and "Zero ALE Mass&

(OP)
Hi,
I am fairly inexperienced in Abaqus and am wondering how to fix the following errors in my model:

"The elements contained in element set ErrElemExcessDistortion-Step1 have distorted excessively."
&
"The elements in element set ErrElemZeroALEMass-Step1 have zero or negative mass."
(screenshots of elements are below)

I am modelling a blast of a cylinder of high explosive. I have defined JWL EoS parameters using Abaqus Example 2.1.8 input files. I'm using ALE adaptive meshing in a dynamic explicit step. Some details about my results and ALE configuration can be seen in screenshots below. How can I fix this excessive distortion? I have tried adjusting the hourglass settings and ALE freq as well as sweep increments but still get errors. Any help is appreciated. I can provide more details if necessary!
Thanks in advance!





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