The relation of the shrinkage and strength properties of wood to its specific gravity . SPECIFIC GRAVIT. (d) IMPACT BENDING - WORK TOELASTIC LIMIT Fig. 2. to the grain, or strength as a column. It has also been supposed thatthe relation applied between pieces of the same species, between piecesof different species, and betweenfaverage results of strength tests ondifferent species. A study of the data at present available, which arederived from a much larger number of tests and which cover a greater BULLETIN 676, U. S. DEPARTMENT OF AGRICULTURE. range in specific gravity and strength values tha
The relation of the shrinkage and strength properties of wood to its specific gravity . SPECIFIC GRAVIT. (d) IMPACT BENDING - WORK TOELASTIC LIMIT Fig. 2. to the grain, or strength as a column. It has also been supposed thatthe relation applied between pieces of the same species, between piecesof different species, and betweenfaverage results of strength tests ondifferent species. A study of the data at present available, which arederived from a much larger number of tests and which cover a greater BULLETIN 676, U. S. DEPARTMENT OF AGRICULTURE. range in specific gravity and strength values than was true of the dataavailable heretofore, made it evident that these assumptions wereinaccurate and that there was a better and more correct methodexpressing the actual relations between specific gravity and 0,25 |.Q> SPECIFIC GRAVITY (a)IMPACT BENDING - HEIGHT 0F\DROP CAUSING COMPLETE FAILURE -*:::::::::::::::?::-- d te. g 12 - i / I T —-/- 1 - aV 1 x? Ill O . _ _i/ i _JL W 54 V _ # i— ,- ~ 1 — z^? 3 -/y.::::: — A. ..:::; 9 r.~ ~-«« SPEMFIC 6RAV8TY - {*) COMPRESSION \\ TO GRAIN :: :: :: : zzzt : i . _ z _ CO > S1,^- - -- - J- %f> i_ f 5 1*1 i % T g/T / . i _ j : :;;5- 7 j *t 7 w5-° s^~ ,^~^ * -w 57 K A1/ ^V S / ©p* /Tf -_7^-- — -//- £—————— 0 SPECIFIC GRAVITY ft/ COMPRESSION II TO GRAINFJ3ER STRESS AT ELASTIC LIMIT :::::::7 ! . / : :::r:: f 0 __j AS3 u Z 6. _ _. z a ml __ _z___/ O O -4^-- / ™___^_. J _^§ z III «II 5 H 7 •*?/ is ^ ^-j-- E , J& L^I _. tn 1 3^ a. sS &A- ^s / / y\y „.., ! ; O ? SPECIFIC GRAVITY (d) COMPRESSION i TO GRAINFIBER STRESS AT ELASTIC LIMIT Fig. 3. RELATION OF SHRINKAGE, ETC., TO SPECIFIC GRAVITY. *::::::::::::::::::r - J--I :____±_ 11 _ _ ±
Size: 1322px × 1889px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectwood, bookyear1919
