積層木材の非線型曲げ疲労挙動(<特集>木質材料)

概要

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Fatigue properties under cyclic non-linear in bending were examined at room temperature for laminated wood with resorcinol resin adhesive(RF)and aqueous-polymer-isocyanate resin adhesive(API). The change of both the relative stress(σ/σ_0)and temperature rising(ΔΤ)which was measured at the point of the maximum temperature rising depended upon mechanical properties of adhesives in a neutral layer of specimens. This is because, for laminated wood with API, an adhesive layer causes heating by cyclic deflection so that the stress in a neutral layer decreases, while, for RF, such heating does not cause. It was found that the peak of ΔΤ related to fatigue life. Both(σ/σ_0)_p and (σ/σ_0)_b are linear to the peak temperature ΔΤ_p, and more the logarithmic cyclic number to failure, log N_b, is linear to the logarithmic cyclic number to the peak of ΔΤ, log N_p.
社団法人日本材料学会の論文
1999-03-15