Performance Analysis Of Basalt Fiber Composites Engine Hood Under Delamination

With the rapid development of the domestic automobile industry,it brings serious environmental pollution problems.Also it push so much pressure on the scarce resources.Under the pollution of environment and lack of resources,new energy vehicle arises at the historic moment.The overweight powertrain put forward higher requirement to lightweight body.Composites have been used more and more frequent because of its outstanding performance.Due to the different reinforcement the composites have many types.The paper aims to research the composite which reinforcement is Basalt Fiber applies to the Engine Hood of vehicle.The paper also studies the Performance Analysis of basalt fiber composites Engine Hood under delamination.Therefore,this paper has the following works to do.Firstly,obtain the simulation for basalt fiber composite material performance of the engine hood.Second,aim to find the location of delamination through the magnitude of interlaminar stress during the work condition.Third,compared Simulation to Experimental,paper chose the Cohesive Zone Model(CZM)which the interface is bilinear traction-separate law(T-S law)to simulation the delamination growth.Fourth,the delamination growth has been simulated.summarize the Engine Hood performance under the influence of delamination.To verify that Basalt Fiber composite can replace steel.The test specimen has been made to material performance test.Specimen has been simulated to verify the model of finite element analysis.Then the stiffness and modality of Engine Hood with Basalt Fiber composite were verified to satisfy the design requirement with FEA and comparison with the result of hood is made of steel,CFRP.Composite laminated plate,the layered failure has to be taken into account.Consider the layered stress is the main influence of delamination.In order to obtain the date in the simulation analysis,the continuum shell(SC8R)are used to analysis.Through data processing for each condition,it is concluded that the 6 kinds of possible defects.Because the interlaminar stress the role of the two directions is independent.There are three of the six kinds of conditions are single defect,the other three kinds of conditions are double defects.But because of the multilayer defects have different energy release rate.Only the first three cases of simulation process.The Cohesive Zone Model in finite element software ABAQUS has been studied.There are two models in Cohesive Zone Model.One is bilinear traction-separate law,the other is exponential traction-separate law.The use-define subroutine which can be applied for Cohesive Zone Model has also been analyzed.In this paper,bilinear traction-separate law has to applied to analysis.By comparison with experiment was carried out to validate its feasibility.The curvature of surface is simplified to plane.The plane is used to simulate the delamination propagation.Cohesive element is used between two layers.The size of delamination is 17mm?16mm at the center of plane.Due to the symmetry of the work condition,we can simplify the calculation.To conclusion,the whole structure performance under the different delamination location.