Research On Fracture Behavior Of Fiber Metal Laminates Seams Under The Force Coupling Load-hot

Fiber metal laminates is a kind of bonded composite material which made of metal andreinforcing fiber material, more excellent than single on metal mechanical properties,especially in the case of anti-fatigue performance. However, fiber metal laminates existsthermal residual stress in the production, and concentrated in joints laminates. So fiber metallaminate joints are the most vulnerable part of the laminates. Improve the safety andreliability from the perspective of the need to destroy the fiber metal laminates combined withthe failure of the Ministry of detailed study in order to understand and master the destructionlayer failure mechanisms. In this paper, experimental and finite element analysis method ofcombining, mainly from the production of fiber metal laminates, experimental, theoreticalfracture failure, software simulation and other aspects of the research and analysis of fibermetal laminates. Optional symmetrical adhesive joints and the interfacial region as the mainobject of study, research and junction temperature and high-temperature fiber metal laminatesjoint width of fracture failure load effects, explore the destruction layer failure mechanisms,mainly to do the following aspects of the work:1) Preparation of sample First, different samples are grouped according to the width ofthe seam, and then at room temperature and high temperature respectively, two states of thetensile test specimen, they produce a load-displacement diagram, and damage observedprocess. According to the experimental load displacement map, summed laminates combinedwidth, the specimen temperature and high-temperature tensile failure load impact.2) Describes the relevant research methods of laminated composite materials, and fibermetal laminates fracture failure theories and guidelines. Focuses on the glued connectionfailure theory and traction-the basic criterion for separation standards to provide a theoreticalbasis for the software simulation.3) According to the sample boundary conditions and loading, establishing a finiteelement model of fiber metal laminate specimen. Using direct coupling method, finite elementanalysis software to simulate the fracture damage situation of different joint width specimensat room temperature and high temperature conditions. From the stiffness degradation andtensile stress cloud after loading angles to analyze the effect of temperature on the stiffnessand fracture cases resulting sample, and compare with the experimental photographs.4) To study effect on the glue joint stress distribution under thermal-mechanicalcoupling at room temperature and high temperature. By contrast, the analysis of thermalresidual stress effects on joint strength. When adhesive joints thermal residual stresses andexternal loads additive effect, it will have a greater impact on the fracture load of fiber metal laminates damage.5) According to the experimental results, Mainly is the destruction of the rubber,according to the relevant layer failure criterion to judge the failure of the sample, to explorethe mechanism of fiber metal laminates fracture failure.