Study On Dynamic Shock Response Behavior Of WE43 Magnesium Alloy

With the continuous development of economy and society,people pay more and more attention to the premise of ensuring security performance,the more resources can be saved,after all,the resources are not inexhaustible.Like most used car parts are aluminium alloy,in under the call of saving resource,however,the amount of aluminum alloy in the car can be slowly light metal or other new materials to replace,and other light metals,can think of is most magnesium,magnesium in industrial metals content in the earth's crust after aluminum,to show that the magnesium content in the earth's crust is also very rich,in addition to this,the quality of magnesium is lighter than aluminum,than the stiffness and strength is higher than aluminum alloy,and one hundred percent magnesium alloys can be recycled,which means that resources can be very good reuse,greatly save the waste of resources.With the continuous development of new energy vehicles,their endurance is a short board.One of the most effective ways to improve the endurance of electric vehicles is to reduce vehicle quality,which will greatly improve their endurance time.Growing with the development of the highway and car,it will greatly improve the possibility of car collision,and is touch is in collision with the highest probability,in the case of head-on collision,in addition to the bumper protection,next is the front longeron,so the effect of longitudinal beam is very important,before the front longeron the size of the kinetic energy absorbing capacity in the car crash becomes especially important.Because the strength performance of rare-earth magnesium alloy is better than that of general magnesium alloy,this paper mainly chooses WE43 rare-earth magnesium alloy as the research.The main research contents are as follows:Firstly,this paper conducts dynamic shock tests in the range of 700s-1?1400s-1 and quasi-static experiments on the electronic universal testing machine for WE43 magnesium alloy through the separated hopkinson pressure bar experimental device,and explores the mechanical properties of WE43 magnesium alloy through the obtained stress and strain data.Secondly,johnson-cook model was used to predict the dynamic mechanical properties of WE43 magnesium alloy.The parameters of JC model of dynamic deformation of WE43 magnesium alloy were obtained by fitting the experimental data,and then the constitutive equation was compared with the stress-strain curve obtained by the experiment.At the same time,Abaqus/explicit finite element software was used to simulate the experiment and compare with the experimental data to obtain the effective constitutive equation of WE43 magnesium alloy.Finally,the(?)cook model is applied to the car collisio the explicit finite element software Abaqus/explicit was used to explore the influence of the cross section shape and thickness of the front longitudinal beam on the energy absorption.