A novel short-time concept for fatigue life estimation of carbon (CFRP) and metal/carbon fiber reinforced polymer (MCFRP)
A novel short-time concept for fatigue life estimation of carbon (CFRP) and metal/carbon fiber reinforced polymer (MCFRP)
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DOI：
10.1016/j.ijfatigue.2018.06.044
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发表时间：
2018-11-01
影响因子：
6
通讯作者：
Balle, F.
中科院分区：
文献类型：
--
作者：
Backe, S.;Balle, F.
对于汽车和飞机工业的结构应用，碳纤维增强聚合物 (CFRP) 因其出色的强度密度比而变得越来越重要。与整体金属概念相比，脆性失效行为、损伤容限差和导电性水平不足是缺点，导致复合材料的轻量化潜力有限。薄金属纤维和碳纤维 (MCFRP) 的集成是一种很有前景的新方法，可提高传统 CFRP 结构的机械性能。结构部件在其使用寿命期间承受循环载荷。 Backe 等人对层压板 MCFRP 和 CFRP 的疲劳行为本身进行了深入研究。 [1]。本研究的目的和新颖之处在于提出一种节省时间和资源的概念来分析复合材料的疲劳行为。因此，重点是基于每个层压板的多次循环载荷增加测试的复合材料疲劳寿命计算的新短时程序。对于 MCFRP 和 CFRP 层压板，不同频率的各种恒幅测试的实验数据与计算的 S-N 曲线之间存在明显的相关性。
For structural applications in the automotive and aircraft industries carbon fiber reinforced polymers (CFRP) have become increasingly important because of their outstanding strength-to-density ratio. A brittle failure behavior, poor damage tolerance and an insufficient level of electrical conductivity are drawbacks compared to monolithic metallic concepts which lead to a limited lightweight potential of composites. The integration of thin metal fibers as well as carbon fibers (MCFRP) is a promising new approach to advance the mechanical properties of conventional CFRP-structures. Structural components are subjected to cyclic loads during their lifetime. The fatigue behavior itself of both laminates MCFRP and CFRP - was intensively investigated in Backe et al. [1]. The aim and novelty of the present study is a time - and resource-saving concept to analyze the fatigue behavior of composites. Therefore, the focus is on a new short-time procedure for fatigue life calculation of composites based on several cyclic load increase tests of each laminate. A clear correlation between experimental data of various constant amplitude tests with varied frequencies and calculated S-N curves is shown for MCFRP and CFRP laminates.