聚四氟乙烯膨胀节内压爆破试验研究

Experimental research on polytetrafluoroethylene expansion joint rupture with internal pressure

推导了聚四氟乙烯波纹管和不锈钢加强圈的爆破应力与爆破压力算式，经算式计算和试件试验都表明，聚四氟乙烯波纹管的爆破系经向薄膜应力所致。

The rupture stress and rupture pressure formulae for the PTFE bellows and the stainless steel reinforcing collar are derived. Both the experiments and the obtained formulae calculation results show that the rupture of PTFE bellows is induced by the meridional membrane stress. The affecting factors for rupture pressure and the methods for increasing rupture pressure are also expounded.