ISO 14085-5:2015规定了一种方法，用于确定滤芯对过滤器污染物加载过程中不同阶段通过过滤器的流量变化引起的流动疲劳的阻力。过滤器在规定的循环次数和预定的压差下承受均匀变化的流量。 尽管ISO 14085本部分中使用的循环次数和压差条件旨在模拟可能的使用条件，但ISO 14085本部分并不旨在在重复使用条件下对滤芯进行鉴定；这只能通过为此目的制定的特定测试协议来实现，包括实际使用条件，例如工作流体、污染和精确的循环流动条件。 ISO 14085-5:2015建立了一种方法，用于验证滤芯承受由可变流量引起的循环压差引起的应力的能力。 应用ISO 14085本部分得出的试验数据可用于比较航空航天液压滤芯的性能。

ISO 14085-5:2015 specifies a method for determining the resistance of a filter element to flow fatigue caused by varying flow through the filter in various stages of the filter contaminant loading process. The filter is subjected to a uniform varying flow rate for a specified number of cycles, at a number of predetermined differential pressures. Although the number of cycles and differential pressure conditions used in this part of ISO 14085 is meant to simulate possible service conditions, this part of ISO 14085 is not intended to qualify a filter element under replicate conditions of service; this can only be done by a specific test protocol developed for the purpose, including actual conditions of use, for example the operating fluid, contamination, and exact cyclic flow conditions. ISO 14085-5:2015 establishes a method for verifying the ability of a filter element to withstand the stress caused by cyclic differential pressures induced by a variable flow rate. The test data resulting from application of this part of ISO 14085 can be used to compare the performance of aerospace hydraulic filter elements.