A Simple Model for Elastic-Plastic Contact of Granular Geomaterials

Table 2

Regression results for loading and unloading coefficients.

Parameters	a	B	m	n
	0.5398	1.3087	2.3104	1.2377
	1.0279E − 03	−8.7130E − 04	9.6205E − 03	−1.2352E − 03
	−4.7213E − 02	4.4259E − 02	−2.8768E − 01	3.6574E − 02
	7.6500E − 05	−7.6019E − 05	9.1244E − 04	−9.5000E − 05
	−6.1476E − 03	6.4120E − 03	−7.1235E − 02	8.0222E − 03
	5.5848E − 05	−3.8951E − 05	6.6345E − 04	−7.9491E − 05
	−4.4023E − 03	3.3763E − 03	−4.8732E − 02	6.2875E − 03