Study on Preparation and Progressive Damage Mode of Open-Hole Fiber Reinforced Magnesium Alloy Laminates During Tensile Process
The damage evolution and final damage mode of glass fiber/epoxy resin reinforced magnesium alloy laminates with different pore sizes were studied by experiments and numerical simulation,and the microscopic damage mode of fracture was analyzed by scanning electron microscopy.At the same time,the fabrication process of fiber-reinforced magnesium alloy laminates was improved.The results show that the surface treatment of AZ31 magnesium alloy can effectively reduce the delamination effect,and the specimen tensile strength is 347.62 MPa,compared with the untreated specimens which is improved by 11.33%,the interlayer microstructure morphology is more compact and uniform.With the increase of the pore size,the residual tensile strength decreases gradually.Fiber reinforced magnesium alloy laminates gradually expand from"X shape"to"funnel shape"in the progressive damage failure process.The failure modes of laminates are complicated mixed failure modes,which are mainly ductile brittle fracture of metal layer,tensile fracture of fiber layer and interlayer delamination.The experimental results are nearly consistent with the finite element numerical simulation results,which verifies the validity of the numerical simulation model and provides a reference for practical engineering applications.
Fiber metal laminatesFailure criterionNumerical simulationHole diameterResidual intensityProgressive damage mode
万方数据
维普
