Analysis Of The Influence Of Temperature On The Crushing Strength And Connection Structrue Of Glare Laminates

GLARE(Glass Laminate Aluminum Reinforced Epoxy)laminate is a fiber metal laminate made of aluminum alloy and epoxy resin-based glass fiber cured at high temperature and high pressure.It not only has the advantages of aluminum alloy material with good impact resistance and ductility,Moreover,it has many advantages such as designability,high specific rigidity and high specific strength of polymer fiber composite materials.Now it has been widely used in the fields of aerospace,robotics and automobile industry.Due to the difference in thermal expansion of the resin matrix,fiber and metal in the fiber metal laminate at different temperatures,thermal strain and complex thermal residual stress will occur,which will have a serious impact on the extrusion strength and load-bearing capacity of the fiber metal laminate.This paper will study the influence of temperature on the crushing strength and connection structure of Glare laminates through a combination of experiment and finite element method.This paper summarizes the damage mechanism of each component of the laminate,so as to provide theoretical support for the subsequent finite element simulation.Afterwards,in order to obtain the influence of temperature,pore size,fiber layup form and other factors on the crushing strength of Glare laminates,the crushing strength of Glare laminates was tested and analyzed through experiments,and the aperture diameter and fiber layup angle of the laminates were analyzed.The influence of factors such as temperature,temperature and other factors on the extrusion strength and failure mode of the laminate,and the damage and damage of the Glare laminate were observed with an optical microscope,and the failure mode of the laminate was obtained.In order to obtain the laws that affect the crushing strength of Glare laminates in a wider range,this paper establishes extrusion based on the 3D-Hashin failure criterion considering the temperature effect,the ductile fracture theory of metals,and the bilinear constitutive theory of viscoelastic bodies.The finite element model of Glare laminate under load has studied and analyzed the influence of fiber layer direction and temperature on the load-bearing capacity of Glare laminate,and analyzed the damage evolution law of each component of the laminate.The load-displacement response curve obtained by finite element simulation and the progressive damage morphology of each component of the laminate are compared and analyzed with the test results,which verifies the reliability of the finite element simulation model.In order to further popularize the application analysis of the obtained crushing strength,based on the above calculation results of the basic compression strength analysis of the laminate,a finite element model of the tension finite element model of the Glare laminate single-lap double-bolt connection structure is established through the finite element method.,Simulation and analysis of the relationship between row pitch ratio P/D and temperature on the bearing capacity and damage evolution of the connection structure.The finite element simulation model proposed in this paper effectively simulates the influence of temperature on the extrusion strength and connection structure of Glare laminates,which can provide references for the design of composite mechanical connection structures in the future.