Learning Forum

[Energizer]

Hi everyone

I invstigate how soil media reacts on blast. In this problem I use Lagrange approach.

First, I try used MAT_SOIL_AND_FOAM. In this way soil tensile but doesn't erode. After that, I tried  MAT_FHWA_SOIL and again I didn't have result which I expect.

I need to soil erode and flew away in different side after blast. What I need to do and what material model use. I think about SPH mesh. 

Could you please give me some advise how can I solve this problem.

[Jingye Qian]

Hi, the soil element becomes distorted when subjected to an explosion, thus the calculation will be unstable, especially for the LAG method.   We can assign the soil as multi-materials ALE and set the ELFORM of *SECTION_SOLID to 11. If you still have a problem, feel free to contact me.

By the way, the parameters of soil can be found on the LSTC website.

[Energizer]

Thanks for your answer. Sound like a good idea. 

Can you  give link  on page with soil parameters? 

[Jingye Qian]

(PDF) Comparison of Lagrangian, SPH and MM-ALE Approaches for Modeling Large Deformations in Soil (researchgate.net)

[Energizer]

 

Thanks again! This article look interesting, especially for geotechnical engineer.