Study On Shear Properties Of Epoxy Resin-Based Carbon Fiber Composites Modified By Inorganic Particles

Since the beginning of the 21st century,composite materials have advantages over traditional materials due to their disclosed properties in terms of stiffness,specific strength,and modulus,making their applications more and more widespread.Among them,epoxy-based carbon fiber composite materials have attracted much attention due to their good rigidity,high specific strength,and excellent specific modulus,and are used in space,transportation,aircraft,machinery,energy,military,medicine,and sports.In various fields.However,carbon fiber materials suffer from the characteristics of smooth surface,high inertia,and poor resin wettability,resulting in epoxy-based carbon fiber composite materials molded with epoxy resins,which have the disadvantages of poor impact resistance and high brittleness.To a certain extent,it limits the development and application of this kind of composite material.Researchers aiming to break through this yoke began to focus on adding inorganic particles to composite materials.It can be seen that the modification effect of inorganic particles on composite materials is of great significance to many fields.This paper mainly conducts the study of in-plane shearing of epoxy resin-based carbon fiber composites modified by inorganic micro/nanoparticles.The specific research projects are as follows:First of all,in order to achieve homogeneous dispersion of inorganic micro/nano particles in epoxy resin,we adopted two dispersion methods:high-speed shearing instrument mechanical shearing and dual-frequency numerical control ultrasonic vibration;Then through the vacuum assisted resin transfer molding process(VARTM),a sample of a laminated inorganic micro/nanoparticle modified epoxy resin-based carbon fiber composite material was prepared with a lay angle of[±45°]_ns.Subsequently,in order to study the in-plane shear performance of epoxy resin-based carbon fiber composites,axial tensile test using[±45°]_nslaminated specimen,use the MTS Landmark electro-hydraulic servo system to axially stretch different contents of micro/nano alumina,silica,nano-scale single-layer graphene oxide and nano-scale multi-wall carbon nanotube modified epoxy-based carbon fiber composites test and destructive section of sample through scanning electron microscope.The results show that when the content of micro/nano alumina and silica are both at 1wt%,the in-plane shear performance of each composite material reaches the best;while when the nano-single-layer graphene oxide and multi-walled carbon nanotubes When the content is 0.3wt%,the in-plane shearing performance of the two composite materials is the best.Then the in-plane shearing performance results and the fracture scan image are comprehensively analyzed,and the micro/nano-level inorganic particles modified epoxy resin matrix are analyzed.The mechanism of carbon fiber composite materials.