纵向腹板增强泡沫夹芯梁的疲劳性能

发布时间：2018-09-12 15:47

【摘要】：纤维增强复合材料(FRP)结构因其轻质高强的特性正逐渐被应用于工程中,其中FRP夹层结构又因其特性优于一般FRP结构,具有更广的工程前景,其在疲劳方面的性能也具有更强的工程意义,而FRP夹层结构在疲劳方面的表现至今很少有相关的研究。真空导入玻璃纤维增强树脂基复合材料(GFRP)腹板增强夹芯梁作为本次试验对象,试验梁的设计参照ASTM-C393,试验梁分为无腹板、纵向腹板两种。采用MTS-370型电液伺服疲劳试验机进行四点弯循环加载的疲劳性能试验,加载采用了正弦波的加载方式,加载频率取2 Hz,根据试验结果评价并分析腹板增强夹芯梁的疲劳性能。试验结果表明:纵向腹板增强夹芯梁在疲劳周期荷载作用下的疲劳性能优于无腹板加强的夹芯梁,其良好的疲劳性能使其展现出宽广的工程前景。
[Abstract]:Fiber reinforced composite (FRP) structure is gradually applied in engineering because of its characteristics of light weight and high strength. Among them, FRP sandwich structure is better than general FRP structure because of its characteristics, so it has a wider engineering prospect. The performance of FRP sandwich structures in fatigue is also of more engineering significance. So far, there has been little research on the fatigue performance of FRP sandwich structures. The (GFRP) web reinforced sandwich beam of glass fiber reinforced resin matrix composite is used as the test object. The design of the test beam is divided into two types according to the ASTM-C393, test beam: no web plate and longitudinal web plate. The fatigue performance test of four-point bending cyclic loading was carried out with MTS-370 type electro-hydraulic servo fatigue testing machine. The loading mode was sinusoidal wave and the loading frequency was 2 Hz,. The fatigue performance of web reinforced sandwich beam was evaluated and analyzed according to the test results. The test results show that the fatigue performance of longitudinal web reinforced sandwich beams is better than that of sandwich beams without web reinforcement under cyclic fatigue loads, and its good fatigue properties can make it show broad engineering prospects.
【作者单位】：南京工业大学土木工程学院;
【基金】：国家自然科学基金(51678297,51408305)
【分类号】：TB332

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