August 24, 2024 at 7:02 am
Ram Gopisetti
Ansys Employee

Hi Yevhen Mishchuk, 

Please make sure that you model the contact between the stone( SPH) and the rigid plate (FEM) using the node_to_surface contact with reasonable SFM, SFS values and set the ITHK=1 in *CONTROL_SPH, The spacing needs to be (shell thickness/2) + particle spacing. Shell thickness is given in *SECTION_SHELL. 

MAT_173 offers damage and failure effects and make sure you use check EPDAM1 and EPDAM2. If you are unsure of these parameters use MAT_ADD_EROSION and set known failure criteria. 

Please perform a literature survey on the methods used by different authors and one stater study is given in the link  https://www.sciencedirect.com/science/article/pii/S1674775517302524

I recommend using the SPG /Peridynamics for these cases as they are more stable and better compared to SPH and may offer a better perspective to your study. 

You can learn more on the particle methods in the link https://www.lstc-cmmg.org/ex-advfem I am not sure of any premade guidelines on using these methods unless the authorised resources from Ansys learning hub. Try checking the public streaming platforms you might find some resources on how-to's on particle methods and some openly accessible documentation  on particle methods are in links

1) https://www.researchgate.net/profile/Riccardo-Andreotti-2/post/Can_you_provide_useful_information_on_Element-Free_Galerkin_on_LS-Dyna/attachment/59d63c15c49f478072ea7a42/AS%3A273747255201792%401442277839456/download/01_meshless_overview.pdf 

2)  https://www.dynalook.com/conferences/15th-international-ls-dyna-conference/spg/smoothed-particle-galerkin-method-with-a-momentum-consistent-smoothing-algorithm-for-coupled-thermal-structural-analysis

3) https://www.dynalook.com/conferences/16th-international-ls-dyna-conference/electromagnetics-spg/t10-2-e-spg-065.pdf

Currently, we do not support local-Petrov method in LSDYNA. 

Cheers, RamÂ