Fig. 1

The simplified model of FEM: (a) Compressive performance test; (b) Bending test; (c) Forklift test (This figures were partially created with WPS 365 Education Edition 12.1, https://365.wps.cn/edu/home/).
The simplified model of FEM: (a) Compressive performance test; (b) Bending test; (c) Forklift test (This figures were partially created with WPS 365 Education Edition 12.1, https://365.wps.cn/edu/home/).