Design And Experimental Research On Tensile Module Of In-Situ Mechanical Testing Machine Of Materials

It has been widely used in the fields of emiconductor, aerospace, defense,automotive manufacturing, weapons, sensors, large equipment manufacturing andnew energy industry about studying on the properties of the materials.There is notenough research about changes on morphology of specimen in the process of thetraditional mechanics of materials testing,but in-situ testing can obtain the detailedimage of it,which is advantaged obviously in the research of the material damagemechanism.In the actual working conditions, the material can`t be stressed by the single loadat room temperature,more often,it may be stressed by the effect of multiple physicsfield or multiple loads.Functional materials is a special material that has physical,chemical and biological effects specially,and always work in environment of multiplephysical field in more cases.Visible,whether structural materials or functionalmaterials,it’s influence on the physical environment and complex load in the actualconditions.So it has very important significance for production,life and academicresearch,that studying the mechanical properties in the multiple physics and multipleload conditions for it.At present,research on in-situ testing mechanics has developed rapidly,but is stillconfined to the single load testing of common structural materials.There`s not muchexperimental study in the fields of multiple physics or multiple loads.On this basis,ain-situ mechanical testing machine of multiple load and multiple physics for thefunctional materials and part of the structural materials was developed in thispaper.The theory of algorithm that is used to correct the parameters was alsoproposed.The experimental of tensile-torsion loading and multiple physical was alsoconducted.In this paper,the tensile module of in-situ mechanical testing machine of the functional materials was developed,and the study of the structure design,the finiteelement analysis and the check was made.A new test machine cooling system wasdeveloped that used annular groove structure,and it insulated heat from the testingmachine by the method of water cooling.Its safety and reliability was verified by theheat insulation test.The causes of test parameters error were proposed from the factors of thespecimen clamping deformation, the machine stress deformation and spindleconcentricity for the accuracy of the tensile test parameters in this paper,and thetheory of their correcting the parameters were proposed in turn.The impact of thetensile test parameter were also researched in this paper.The effect of the specimenclamping deformation and the machine stress deformation were obvious in the tensiletest from the research results,so the overall parameter correction formula wasestablished on the base of their amendment algorithm.In this paper, in-situ tensile test was carried out for the functional material andconventional structural material with self-made testing machine,and microscopicimage of N6nickel was obtained,so that the tensile fracture process of N6nickel wasunderstood.The relationship of the material mechanical property parameters about theeffect of tensile rate and torsion rate was researched through the experiment oftension-torsion loading for5052aluminum.And the relationship of the materialmechanical property parameters about thermal field and magnetic field was alsoanalysed and researched through the experiment for Q235steel and N6nickel in thesimulate physical field which is full of heat or magnetic.