Soil and Rotavator Blade analysis

Hi Sir,

I have College project in which i have analyse a Rotary Tiller Blade.

That is .... a Single blade rotating about an axis  and striking the compacted soil surface.

Kindly guide me What material configuration should i use in order to model a 

compacted soil block in hypermesh 

For reference attached is the image of tiller<?xml version="1.0" encoding="UTF-8"?>