摘要
中空夹芯复合材料具有优异的综合性能和可设计性,本文将其应用在轨道交通领域,设计一种双夹层中空夹芯结构用于研制地板。通过有限元分析方法对双夹层结构设计方案的合理性进行验证,研究了集中荷载和均布荷载作用下各层受应力情况;开展了研制地板的板芯剥离强度、抗拉强度、抗压强度、四点弯曲强度、隔音性能、防火性能的测试,并与铝蜂窝夹芯结构的性能进行对比。结果表明双夹层结构中空复合地板具有更好的承载和抗分层性能,力学性能优于铝蜂窝地板;其燃烧等级达到了SF3级,毒性指数FED≤1,故防火性能与铝蜂窝地板一样安全;且中空复合地板的隔音性能优于铝蜂窝地板,能满足更高的舒适性和安全需求。
Because of its outstanding comprehensive properties and design freedom, the hollow sandwich composites were used in rail transit field. A double hollow sandwiches structure was designed and used to prepare a new floor. The double sandwich composite floor structure was analyzed using finite element method to verify the retionality of the de- sign and study the stresses of each sandwich under concentrated load and uniformly distributed load. The mechanical properties,accoustic insulation and fire resistance were tested and compared with the honeycomb sandwich composite floor. The results have showed that the tensile strength, compression strength, core peeling strength and four-point ben- ding strength of the hollow composite floor are greater than those of honeycomb composite floor, resulting in higher load-bearing and anti-delamination performance ;the fire safety of the hollow composite floor（with fire rating up to SF3 and toxicity index 〈~ 1 ） is same as the honeycomb composite floor; and the sound insulating property of hollow compos- ite floor is also superior so that it can meet the higher requirements of comfortability and safety.
出处
《玻璃纤维》
CAS
2017年第5期7-12,共6页
Fiber Glass
