Gong Jingliang, Saeed Nouman, Huang Xigui, Tian Weiwei, Li Lixiao, Song Jian
College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China.
School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
Polymers (Basel). 2023 Dec 29;16(1):108. doi: 10.3390/polym16010108.
The influence of fiber volume content on the mechanical properties of two-dimensional (2D) plain carbon-fiber woven composites is a crucial concern that necessitates immediate attention for large-scale applications in wind turbine blades. In this study, various mechanical tests were conducted on 2D plain carbon-fiber woven composites with different fiber volume contents, and the influences of fiber volume content on the mechanical properties and failure mode of the composite material were analyzed. Using carbon fiber as reinforcement and epoxy resin as a matrix, three types of plates with fiber volume contents of 47%, 50% and 53% were fabricated by using autoclave technology. The tensile, compression and interlaminar shear tests of the two-dimensional woven composites were carried out using MTS series testing machines. The influences of fiber volume content on tensile strength and modulus, compressive strength and modulus, interlaminar shear strength and shear strain energy were investigated. Additionally, the progressive damage development of these two-dimensional woven composites under different stress states was studied using scanning electron microscopy (SEM). The results indicate that the tensile strength and compressive strength increase almost linearly with the increase in fiber volume content, while the interlaminar shear strength increases slowly at low fiber volume content and rapidly at high fiber volume content. The tensile modulus of elasticity slightly increases as the fiber volume content increases, whereas the compressive modulus remains stable at low fiber volume content but gradually decreases at high fiber volume content. With the increase in fiber volume content, the shear strain energy of the specimen increases significantly.
纤维体积含量对二维（2D）平纹碳纤维编织复合材料力学性能的影响是一个至关重要的问题，对于风力涡轮机叶片的大规模应用而言，这一问题亟待关注。在本研究中，对具有不同纤维体积含量的二维平纹碳纤维编织复合材料进行了各种力学测试，并分析了纤维体积含量对复合材料力学性能和失效模式的影响。以碳纤维为增强材料、环氧树脂为基体，采用热压罐技术制备了纤维体积含量分别为47%、50%和53%的三种板材。使用MTS系列试验机对二维编织复合材料进行拉伸、压缩和层间剪切试验。研究了纤维体积含量对拉伸强度和模量、压缩强度和模量、层间剪切强度和剪切应变能的影响。此外，利用扫描电子显微镜（SEM）研究了这些二维编织复合材料在不同应力状态下的渐进损伤发展情况。结果表明，拉伸强度和压缩强度几乎随纤维体积含量的增加呈线性增加，而层间剪切强度在低纤维体积含量时增加缓慢，在高纤维体积含量时迅速增加。拉伸弹性模量随纤维体积含量的增加略有增加，而压缩模量在低纤维体积含量时保持稳定，但在高纤维体积含量时逐渐降低。随着纤维体积含量的增加，试样的剪切应变能显著增加。
