Contributions of end-wall and lumen bonding to strength of butt joints

Front Cover
U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1968 - House & Home - 12 pages
0 Reviews
Strength of normal butt joints of slash pine (Pinus elliottii Engelm.) varied by wood type (earlywood or latewood) and as a result of aging of the ductile epoxy-resin adhesive before it was used. Magnitude of the difference in tensile strength between earlywood joints and latewood joints was directly associated with the capacity of the adhesive-end wall and adhesive-lumen perimeter bonds to distribute stress. Thin-walled earlywood cells were more conductive to stress distribution than were thick-walled latewood cells. The capacity of the end-wall bond to transmit stress was virtually independent of adhesive viscosity, as controlled by age of the adhesive used in fabricating a joint. Moreover, it appeared that for joints fabricated from untreated surfaces, the effect of adhesive age on joint strength was directly associated with bonding to the inner lumen walls. (Author).
 

What people are saying - Write a review

We haven't found any reviews in the usual places.

Selected pages

Common terms and phrases

Bibliographic information