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利用复合材料层合板理论对碳纤维增强聚氨酯(PU)密封胶在海水压力下的受力状况进行了简要的数学分析,并结合耐压试验结果,对碳纤维增强PU密封胶的老化及渗漏性能进行了分析。结果表明:应用层合板理论计算得到的复合材料环体的轴向压缩强度、环向拉伸强度、径向压缩强度及受力情况均满足设计要求;但是,上述计算均以碳纤维增强PU胶粘剂材料的静态力学性能为依据的,而复合材料环体在工作时呈动态力学状态,故应用层合板理论进行相关性能的计算还存在着一定的误差;目前采用碳纤维增强PU缠绕工艺、辅以表面处理剂和净水隔离剂后所制备的电缆密封胶,在7MPa压力作用下,环型管节没有泄漏,与计算结果预测一致。
The mechanical behavior of carbon fiber reinforced polyurethane (PU) sealant under seawater pressure was analyzed by using composite laminates theory. The aging and leakage of carbon fiber reinforced PU sealant Analysis. The results show that the axial compressive strength, circumferential tensile strength, radial compressive strength and stress conditions of the composite ring body calculated by the theory of laminates all meet the design requirements; however, the above calculations are based on the carbon fiber reinforced PU adhesive material Of the static mechanical properties of the basis, and the composite ring in the work of dynamic mechanical state, so the application of the theoretical calculation of the relevant properties of the laminate there are still some errors; the current carbon fiber reinforced PU winding process, supplemented by surface treatment The cable sealant prepared after the agent and the water purifying release agent did not leak in the ring pipe joints under the pressure of 7MPa, which is in good agreement with the calculation result.