微尺度纤维/金属混杂层板的低约束拉伸变形性能

Low constraint tensile deformation properties on micro scale fiber/metal hybrid laminates

为了研究微尺度下纤维金属层板的变形规律,以TA1钛合金板和碳纤维增强预浸料为原材料,制备了不同类型的微尺度TiGr层板,并通过单向拉伸试验研究了TiGr层板的变形性能。通过改变制备工艺、层板结构、金属层厚度以及设置不同的加载速度,得到应力-应变曲线。对各种情况下的抗拉强度和伸长率进行对比分析,得到了试验变量对TiGr层板变形过程的影响规律,并分析了层板的断裂失效形式和断口宏观形貌。最终得出:采用低约束工艺制备,加载速度为3 mm·min^(-1)、金属层厚度为0.04 mm情况下,TiGr层板的变形性能最好,其抗拉强度为229.45 MPa、伸长率为27.8%。

In order to study the deformation law of fiber metal laminates at micro scale,for TA1 titanium alloy plate and carbon fiber reinforced prepreg,the different types of microscale TiGr laminates were prepared,and the deformation properties of TiGr laminates were studied by uniaxial tensile test.Then,the stress-strain curves were obtained by changing the preparation process,laminate structure and metal layer thickness and setting different loading speeds.Furthermore,the tensile strength and elongation under various conditions were compared and analyzed,and the influence law of test variables on the deformation process of microscales TiGr laminates was obtained to analyze the fracture failure forms of laminates and the macro morphology of fracture.Finally,it is concluded that the deformation performance of TiGr laminates prepared by low constraint process is the best when the loading speed is 3 mm·min^(-1) and the metal layer thickness is 0.04 mm,and its tensile strength is 229.45 MPa and the elongation is 27.8%.