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Experimental Study on the Temperature Dependency of Full Scale Low Hardness Lead Rubber Bearing

Full-scale 저경도 납면진받침의 온도의존성에 대한 실험적 연구

  • Received : 2012.11.09
  • Accepted : 2012.11.28
  • Published : 2012.12.31

Abstract

Rubber laminated bearings with lead core are highly affected by changes in temperature because key materials which are rubber and lead have temperature dependencies. In this study, two full scale LRB(D800, S=5) are manufactured and temperature dependency tests on shear properties are accomplished. The shear properties at the 3rd cycle are used at $-10^{\circ}C$, $0^{\circ}C$, $10^{\circ}C$, $20^{\circ}C$, $30^{\circ}C$, $40^{\circ}C$ respectively. The double shear configuration, simultaneously testing two pieces, is applied for compression shear test in order to minimize the friction effects due to the test machine, described in ISO 22762-1:2010. Characteristic strength, post-yield stiffness, effective stiffness, equivalent damping ratio are estimated and presented coefficient due to the temperature changes.

Keywords

lead rubber bearing;temperature dependency;low hardness rubber;nuclear power plants

References

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Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)