【摘要】 研究不同排列方式的纤维金属3维复合材料在不同方向上的力学性能和失效模式,对复合材料试样进行拉伸试验、三点弯曲试验及静态压入试验.拉伸试验表明[0°/0°]排列的复合材料在纤维方向上具有最高的拉伸模量、屈服强度及拉伸强度,而在垂直于纤维方向上具有很低的力学性能.[0°/90°]排列的复合材料由于其仅一侧纤维受拉,其力学性能相对较弱,且变形模式表现为试样的弯曲变形.[0°/0°]和[0°/90°]两种方式排列的复合材料的拉伸剪切性能差别较小.弯曲试验表明[0°/0°]排列方式的复合材料在纤维方向上的抗弯能力最高.静态压入试验表明,[0°/0°]和[0°/90°]的复合板具有近似的抗压入破坏能力.试样破坏模式显示,纤维金属3维复合材料未出现界面失效等结构性破坏,具有优良的界面强度.更多还原

【Abstract】 Mechanical properties and failure modes of fiber metal three-dimensional composites different layouts in different directions were analyzed. Tensile test, three-point flexural test and static indentation test were conducted composites. Tensile test showed that [0°/0°] layout composites have the optimal tensile modulus, yield strength and tensile strength along the fiber direction, and have extremely weak mechanical properties in the perpendicular direction of fiber. [0°/90°] layout composites have relatively weak mechanical properties because only one side of fiber is stretched, and deformation modes show bending deformation of sample. [0°/0°] layout and [0°/90°] layout composites have small differences in tensile shear properties. Flexural test showed that [0°/0°] layout composites have the highest flexural resistance in the fiber direction. Static indentation tests show that [0°/0°] layout and [0°/90°] layout composites have similar damage resistance. The failure modes show that the fiber metal three-dimensional composites don’t structural damage such as interface failure, and have excellent interfacial strength.更多还原