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管状纺织复合材料作内衬管修复受损管道,是通过气压或水压翻转衬于管道中的,在翻衬过程中,由于翻衬压强的作用,管状纺织复合材料要承受复杂的应力与应变。本文中通过有限元方法对管状纺织复合材料翻衬时的应力和应变情况进行了分析,而且有限元模拟值分别与理论值和试验值进行了比较。结果表明:管状纺织复合材料在翻转时,翻转的头端,应力和应变不稳定,有应力集中的情况,因此在翻转头端最容易发生管状纺织复合材料的破裂;在管状纺织复合材料几何参数与组分材料一定的情况下,可通过有限元方法,给出不同翻衬压强值下其可修复管道的管径范围。
Tubular textile composites as linings to repair damaged tubes are lined with tubing by pneumatic or hydraulic overturning. In the process of lining, due to the effect of backing pressure, tubular textile composites are subject to complex stresses and strains . In this paper, the stress and strain of the tubular textile composite lining are analyzed by the finite element method, and the finite element simulation values are compared with the theoretical value and the experimental value respectively. The results show that when the tubular textile composite material is overturned, the tip, the stress and the strain of the overturning are unstable and the stress concentrates. Therefore, the tubular textile composite material is most likely to rupture at the flipping head. When the tubular textile composite geometric parameter In the case of a certain material composition, the diameter range of the repairable pipe can be given by the finite element method under different flap pressure values.