Table 2.
Cycle life for materials of interest
| Elastic mechanism | Cycle life (cycles) | Max. stress | Sources |
|---|---|---|---|
| Carbon fiber |
|
,
,
|
Dharan (1975) |
|
,
,
|
Miyano et al. (1997) |
|
|
,
,
|
Bezazi et al. (2003) |
|
| Fiberglass |
|
,
|
D’Amore et al. (2013) |
|
,
|
El-Assal and Khashaba (2007) |
|
|
,
|
||
|
|
||
| Titanium |
|
,
|
Kikuchi et al. (2015);
Jiang et al. (2007) |
| Gas springs |
|
Ameritool (2017); Bansbach (2017) | |
|
Dadco, Inc. (2016) | ||
| NGR |
|
300%
|
Cadwell et al. (1940) |
|
200%
|
Flamm et al. (2011) |
|
|
100%
|
||
|
50%
, 35%
|
||
|
200%
400%*
|
||
|
250%
300%**
|
Notes: Multiple entries are shown for each material to show how the cycle life varies with the maximum applied stress; the fraction of the yield stress
is shown. Several entries are shown with different yield strengths corresponding to the same cycle life because different papers cited gave different values. All NGR samples assume 0% initial strain with the exception of those denoted by an asterisk (*); the single asterisk (*) has a 200% initial strain with 200% elongation, and the double asterisk (**) has an initial strain of 250% and an additional 50% elongation. Cycle life is shown for carbon fiber, fiberglass, and titanium tested with a stress ratio of 0.1.
Abbreviation: NGR, natural gum rubber.