穴あけ法による樹幹の内部応力(生長応力)の測定

概要

論文の詳細を見る
This paper presents a modified hole-drilling technique for measuring residual stresses in tree trunk. The primary advantage of the modification is that it can be applied to a standing , tree. Two holes drilled above and below the strain measuring point release completely the strain in the longitudinal direction of a trunk. On the other hand, two holes drilled on both sides of the measuring point bring in a relaxation of the strain in the tangential direction of a trunk but, at the same time, create a new strain due to the diagonal stresses at above and below the holes. The occurance of such new stresses can be avoided by drilling a number of holes at above and below the measuring point. The strain in this study was determined by a wire-strain-gage sticked with α-cyanoacrylate instant-curing adhesive.
社団法人日本材料学会の論文
1977-05-15