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Figure 12-17. Reference fatigue properties of laminated Douglas fir/epoxy material, from
laboratory tests.
(a) Effects of joint type, veneer grade, and specimen size on tension-tension
fatigue (
R
f
= 0.1) parallel to the grain (b) Goodman diagram of the interaction of cyclic and
average stresses for lifetimes of 10 million cycles [Spera
et al.
1990]
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