液压油开口闪点测定的是按照GB/T3536石油产品闪点燃点的测定 克利夫兰开口杯法来测定的。液压油闪点测定的方法概要将试样装人试验杯至规定的刻度线。先迅速升高试样的温度,当接近闪点时再缓慢地以恒定的速率升温。在规定的温度间隔,用一个小的试验火焰扫过试验杯,使试验火焰引起试样液面上部蒸气闪火的最低温度即为闪点。如需测定燃点,应继续进行试验,直到试验火焰引起试样液面的蒸气着火并至少维持燃烧5 s 的最低温即为燃点。在环境大压下得的点和点用式正到大气下的闪点和燃点
Recent advances in composite manufacturing have occurredpredominantly in the aerospace, marine, automotive and relatedindustries. Whilst, formerly, naval vessels were constructed fromsteel, composites provide a significant weight reduction andincrease in stealth properties whilst maintaining high strengthproperties. However composite sandwich materials have yet to bewidely adopted in the construction of naval vessels despite theirexcellent strength to weight ratio and low radar return. One barrierto their wider use is our limited understanding of their performancewhen subject to air blast.