ShareTHERMAL CONTRACTION AND CRACKING OF EXTRUDED POLYETHYLENE ELECTRICAL INSULATION AT CRYOGENIC TEMPERATURES.
Author(s) : SHIMIZU N.
Type of article: Article
Summary
THERMAL CONTRACTION AND CRACKING OF EXTRUDED POLYETHYLENE INSULATED MODEL CABLE WERE INVESTIGATED AT CRYOGENIC TEMPERATURES. IT WAS POSSIBLE TO COOL DOWN SAMPLES TO 77 OR 4.2 K WITHOUT CRACKING BY GRADUAL COOLING. RAPID COOLING OR LOCALIZED COOLING CAUSED LONGITUDINAL CRACKING. THE EXPERIMENTS AND THEORETICAL ANALYSIS SHOWED THAT GRADUAL GAS COOLING TO AT LEAST 135 K IS ESSENTIAL TO PREVENT CRACK FORMATION. EFFECTS OF CABLE BENDING AND MECHANICAL DEFECTS IN THE POLYETHYLENE INSULATION LAYER WERE EXAMINED.
Details
- Original title: THERMAL CONTRACTION AND CRACKING OF EXTRUDED POLYETHYLENE ELECTRICAL INSULATION AT CRYOGENIC TEMPERATURES.
- Record ID : 1987-0838
- Languages: English
- Source: Cryogenics - vol. 26 - n. 8
- Publication date: 1986
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