Abstract
Traditinally fatigue resistance is quantified as number of cycles
to failure at a given stress level. A previous study by the
authors showed that fatigue in compression parallel to the grain
is governed partly by duration of load and partly by an effect of
loading, i.e. a combination of a creep mechanism and a mechanism
connected to damage introduce in the loading sequences. The
purpose of the present study is to disentangle the effect of
duration of load from the effect of load oscillation in fatigue in
tension perpendicular to the grain. Fatigue experiments are made
on small specimens and on dowel type joints with slotted in steel
plates. In series of ten, the small specimens are taken to fatigue
failure in uniform tension at square wave shaped load cycles at
0.01 Hz and 0.1 Hz. In order to test the predictive validity of
the result from the small tension specimens, fatigue experiments
are made on dowel type connections that have tension perpendicular
to the grain as limiting strength parameter. Is is concluded that
no significant influence of duration of load is observed when the
fatigue resistance of small specimens at 0.01 Hz and 0.1 Hz are
compared. A weak but inconclusive time dependency is observed for
the fatigue experiments on dowel type connections.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of Pacific Timber Engineering Conference, Volume 3 |
| Place of Publication | Rotorua |
| Publisher | New Zealand Forest Research Institute Limited |
| Publication date | 1999 |
| Pages | 406-413 |
| Publication status | Published - 1999 |
| Event | Pacific Timber Engineering Conference - Rotorua, New Zealand Duration: 14 Mar 1999 → 18 Mar 1999 |
Conference
| Conference | Pacific Timber Engineering Conference |
|---|---|
| Country/Territory | New Zealand |
| City | Rotorua |
| Period | 14/03/1999 → 18/03/1999 |