David Francesco, Moretti Patrizia, Tagliaferri Vincenzo, Trovalusci Federica
Dipartimento di Ingegneria dell'Impresa, Università degli Studi di Roma "Tor Vergata", via del Politecnico 1, 00133 Roma, Italy.
Materials (Basel). 2020 Mar 5;13(5):1154. doi: 10.3390/ma13051154.
This study focuses on the application of the FIMEC (flat-top cylinder indenter for mechanical characterization) indentation test to evaluate the effect of water uptake on the mechanical properties of high-performance materials, in particular CFRP (carbon fibre reinforced polymer) composites. Coated and uncoated samples were analyzed. Silicon-based and siloxane coatings were formulated and applied to CFRP to reduce the moisture absorption of the material. The FIMEC test was adopted to study the reduction of the stiffness of CFRP plates for different ageing in water. The evolution of mechanical properties is reported as a function of the water uptake. IR analyses and weight variation measures were used as supporting data. Experimental results show that the FIMEC test is suitable to assess the stiffness reduction due to the aging in water and to identify coatings able to minimize the water uptake.
本研究聚焦于FIMEC（用于力学表征的平顶圆柱压头）压痕试验的应用，以评估吸水对高性能材料，特别是碳纤维增强聚合物（CFRP）复合材料力学性能的影响。对涂覆和未涂覆的样品进行了分析。配制了硅基和硅氧烷涂层并应用于CFRP，以降低材料的吸湿性。采用FIMEC试验研究了不同水老化条件下CFRP板刚度的降低情况。将力学性能的演变报告为吸水量的函数。红外分析和重量变化测量用作辅助数据。实验结果表明，FIMEC试验适用于评估水老化导致的刚度降低，并识别能够使吸水量最小化的涂层。
