網絲の切斷に伴ふ長さと徑との變化

安田 秀明

doi:10.2331/suisan.5.85

Change in Length and Diameter of a Netting Cord at the Breaking

Hideaki YASUDA

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JOURNAL FREE ACCESS

1936 Volume 5 Issue 2 Pages 85-86

DOI https://doi.org/10.2331/suisan.5.85

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Published: July 10, 1936 Received: - Available on J-STAGE: February 29, 2008 Accepted: - Advance online publication: - Revised: -
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Date of correction: February 29, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : The change in radius r and length 1 of a netting cord, either caused by absorption of water or by loading, was known to obey the relation : Δl/l=-kΔr/r. It follows, thence, (r+Δr)/(l+Δ1)=Kr/l, where K=1-(1+k)Δl/kl.
With 3-ply cotton cord, of which each thread consists of twenty 20′ ^s yarns, the following facts were found experimentally:- (1) K is constantly I•22 irrespective of the number and the sense of twists, when the cord is immersed in water for 48 hours at 3 to 9°C. (2) K is also constant, when the dried or wetted cord is loaded to break. (3) At the breaking Δ/l of a dried cord bears a constant ratio to that of a wetted cord. Similar results were also obtain-ed with various kinds of the nettin? cords in common use.
Right : The change in radius r and length 1 of a netting cord, either caused by absorption of water or by loading, was known to obey the relation : Δl/l=-kΔr/r. It follows, thence, (r+Δr)/(l+Δ1)=Kr/l, where K=1-(1+k)Δl/kl.
With 3-ply cotton cord, of which each thread consists of twenty 20' ^s yarns, the following facts were found experimentally:- (1) K is constantly I•22 irrespective of the number and the sense of twists, when the cord is immersed in water for 48 hours at 3 to 9°C. (2) K is also constant, when the dried or wetted cord is loaded to break. (3) At the breaking Δ/l of a dried cord bears a constant ratio to that of a wetted cord. Similar results were also obtain-ed with various kinds of the nettin? cords in common use.

Date of correction: February 29, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

The change in radius r and length 1 of a netting cord, either caused by absorption of water or by loading, was known to obey the relation : Δl/l=-kΔr/r. It follows, thence, (r+Δr)/(l+Δ1)=Kr/l, where K=1-(1+k)Δl/kl.
With 3-ply cotton cord, of which each thread consists of twenty 20' ^s yarns, the following facts were found experimentally:- (1) K is constantly I•22 irrespective of the number and the sense of twists, when the cord is immersed in water for 48 hours at 3 to 9°C. (2) K is also constant, when the dried or wetted cord is loaded to break. (3) At the breaking Δ/l of a dried cord bears a constant ratio to that of a wetted cord. Similar results were also obtain-ed with various kinds of the nettin? cords in common use.

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