Table 2.
Calculated stiffness values (cS) at predefined impact velocities (V2, V3, and V4) and coefficients of determination (R2-values) split by floor type. The different bedding materials are sorted in ascending order according to stiffness: sawdust (SAW), sand (SA), recycled manure solids (REC), horse manure (HM), horse manure with chopped straw (HMS), bark mulch (BM), bark mulch with chopped straw (BMS), soft rubber mat II (SRM II), soft rubber mat I (SRM I), and hard rubber mat (HRM). The unit of impact velocity is m∙s−1 (V2 = 2 m∙s−1, V3 = 3 m∙s−1, V4 = 4 m∙s−1), stiffness is given as kN∙m−1.
| Impact Velocities | ||||
|---|---|---|---|---|
| Floor | V2 | V3 | V4 | R2 |
| SAW | 9.7 | 12.6 | 15.4 | 0.7 |
| SA | 19.2 | 21.6 | 24.0 | 0.1 |
| REC | 33.5 | 36.8 | 40.1 | 0.4 |
| HM | 48.4 | 57.6 | 66.7 | 0.3 |
| HMS | 54.1 | 70.6 | 87.1 | 0.8 |
| BM | 78.0 | 106.4 | 134.7 | 0.7 |
| BMS | 89.8 | 129.6 | 169.4 | 0.8 |
| SRM II | 172.3 | 309.0 | 445.8 | 0.9 |
| SRM I | 405.1 | 500.4 | 595.7 | 0.9 |
| HRM | 905.7 | 1524.9 | 2144.1 | >0.9 |