玄武岩二维编织结构复合材料力学性能研究

STUDY ON MECHANICAL PROPERTIES OF BASALT TWO-DIMENSIONAL BRAIDED STRUCTURE COMPOSITES

以采用不同编织节距编织绳作为绳芯的双编绳与无捻粗纱作为绳芯的编织平行纤维绳为增强体,与环氧树脂CYD-128复合固化后制成具有一定形状及性能的复合材料,测试绳芯形式对复合材料力学性能的影响。结果表明:增强体绳芯节距对增强体的拉伸性能以及复合材料的拉伸性能、弯曲性能、压缩性能影响显著。在本试验范围内,绳芯节距为60 mm的增强体断裂强力最高,比最低值高出56%;增强体绳芯节距为60 mm的复合材料拉伸强度、压缩强度最高,比最低值分别高出77%、238%;增强体为编织平行纤维绳的复合材料弯曲强度最高,比最低值高出59%。

Basalt fiber mesh material is a new type of fiber reinforced polymer composites,which is made of basalt braided rope as raw material.But the testing process of grid material performance is more complex.So the research on the mechanical properties of raw material can simplify the research process of grid material mechanical properties.The braided parallel fiber rope with different braided pitch rope such as 20 mm,30 mm,40 mm,50 mm and 60 mm as rope core and basalt fiber roving as rope core were used as reinforcements.Composite materials with certain shape and properties were prepared by composite curing with epoxy resin CYD-128.The effect of rope core form on the mechanical properties such as tensile properties,bending properties and compression properties of the composites were tested.The results of one factor variance analysis show that the reinforcement rope core pitch has a significant effect on the tensile properties,bending properties and compression properties of the composites.The results of visual analysis show that in this experiment range,the fracture strength of the reinforcements with rope core pitch of 60 mm is the highest,which is 56%higher than the lowest value with rope core pitch of 20 mm.The tensile strength and compressive strength of the composite with reinforcement rope core pitch of 60 mm are the highest,which are 77%and 238%higher than the lowest value with reinforcement rope core pitch of 20 mm,and the bending strength of the composite with braided parallel fiber rope is the highest,which is 59%higher than the lowest value with reinforcement rope core pitch of 20 mm.