Table A3.
Test conditions for the materials in Figure 2 and Table 1: In the Type column, “Ext” indicates extension, “Comp” indicates compression testing, and “Bend” indicates three-point bend testing
| Elastic mechanism | Type | Sample dimensions (mm) | Speed (mm/min) | Peak force (N) |
|---|---|---|---|---|
Carbon fiber (0.5
) |
Bend | 80
11.1
1.8 |
10 | 215 |
Carbon fiber (0.83
) |
Bend | 80
11.1
1.8 |
10 | 357 |
Fiberglass (0.5
) |
Bend | 80
25.4
3.18 |
10 | 265 |
Fiberglass (0.83
) |
Bend | 80
25.4
3.18 |
10 | 441 |
Titanium (0.5
) |
Bend | 80
12.7
3.18 |
10 | 470 |
Titanium (0.83
) |
Bend | 80
12.7
3.18 |
10 | 780 |
| NGR (50%) | Ext | 90
50.8
3.18 |
20 | 48 |
| NGR (100%) | Ext | 120
50.8
3.18 |
50 | 72 |
| Gas spring (2135 N) | Comp | 7.6
3.18
|
10 | 2135 |
| Gas spring (1258 N) | Comp | 21.0
2.24
|
20 | 1281 |
| Gas spring (578 N) | Comp | 27.2
1.91
|
50 | 800 |
Notes: In the Sample Dimensions column, the dimensions are listed in the order of length × width × thickness, except for gas springs which show the extended length and the diameter of the cylinder body (ϕ). For the three-point bend testing, the sample length listed was the distance between end supports.
Abbreviation: NGR, natural gum rubber.