A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
RESIN PIPE
PROBLEM TO BE SOLVED: To provide a resin pipe that resists shrinking due to residual stress.SOLUTION: A hard vinyl chloride resin pipe has residual stress σ of σ≤0 as calculated by the following formula (1): σ=[E/(1-R)] t/2 (1/r1-1/r0) (E: tensile elasticity, R: Poisson ratio, t: wall thickness, r0: inside radius before slit formation, and r1: inside radius after slit formation).SELECTED DRAWING: Figure 1
【課題】主に、残留応力による収縮のない樹脂管が得られるようにする。【解決手段】下記式（１）から算出され、残留応力σがσ≦０であることを特徴とする硬質塩化ビニル樹脂管。σ＝［Ｅ／（１−Ｒ２）］・ｔ／２・（１／ｒ１−１／ｒ０） ・・・（１）（Ｅ：引張弾性率、Ｒ：ポアソン比、ｔ：肉厚、ｒ０：スリット形成前内半径、ｒ１：スリット形成後内半径）【選択図】図１
RESIN PIPE
PROBLEM TO BE SOLVED: To provide a resin pipe that resists shrinking due to residual stress.SOLUTION: A hard vinyl chloride resin pipe has residual stress σ of σ≤0 as calculated by the following formula (1): σ=[E/(1-R)] t/2 (1/r1-1/r0) (E: tensile elasticity, R: Poisson ratio, t: wall thickness, r0: inside radius before slit formation, and r1: inside radius after slit formation).SELECTED DRAWING: Figure 1
【課題】主に、残留応力による収縮のない樹脂管が得られるようにする。【解決手段】下記式（１）から算出され、残留応力σがσ≦０であることを特徴とする硬質塩化ビニル樹脂管。σ＝［Ｅ／（１−Ｒ２）］・ｔ／２・（１／ｒ１−１／ｒ０） ・・・（１）（Ｅ：引張弾性率、Ｒ：ポアソン比、ｔ：肉厚、ｒ０：スリット形成前内半径、ｒ１：スリット形成後内半径）【選択図】図１
RESIN PIPE
樹脂管
KURISU TADAOMI (author) / ARAI KATSUMI (author) / HITOMI SEIICHI (author) / NAMIHANA NAOTO (author) / TAKEDA SHINICHI (author) / TAKEMURA SHIGEO (author)
2017-10-05
Patent
Electronic Resource
Japanese
British Library Online Contents | 1997
VINYL CHLORIDE RESIN PIPE AND METHOD FOR CONSTRUCTING VINYL CHLORIDE RESIN PIPE
| European Patent Office | 2021