Experimental Analysis Of Basic Mechanical Properties Of Porous Metal—Concrete

Porous metal material is a new type of material which is developing rapidly in recent years.It is also called foam metal material.Because of its multi hole characteristics and excellent properties,porous metal materials show good application prospects in many aspects.However,due to the characteristics of porous materials,its bearing capacity is weak,and its application scope is limited.In recent years,there are many composite forms of porous metals and other materials,that is,porous metals form new materials by combining with other materials.At present,there are many composite forms,which can be roughly divided into two types: porous metal sandwich structure and porous metal void filled composite.At the same time,porous metal composite materials have many advantages in many fields,such as light weight,heat resistance,corrosion resistance,excellent mechanical properties and so on.In this paper,a new type of composite is designed,in which porous metal and concrete are used to composite,and the specimens of the material are prepared.The corresponding experimental research and finite element simulation of the mechanical properties of the foundation are carried out.The main contents are as follows:(1)The monotonic tensile and compression tests of porous nickel materials were carried out,and the samples with different relative density were compared and analyzed.The influence of relative density on the tensile and compression mechanical properties of porous nickel was discussed.(2)The composite specimens of porous nickel and concrete were prepared and tested in monotonic tension,compression and shear.(3)In this paper,the fracture properties of the composite specimens of porous nickel and UHPC(ultra-high performance concrete)were tested,and compared with the concrete specimens of the same size.(4)Using the finite element software to simulate the composite fracture energy test specimen,the load displacement curve,the stress-strain curve and the test results are compared and analyzed.Through experimental research and finite element analysis,the following conclusions are obtained: the ultimate bearing capacity and ductility of porous metal concrete composite specimens are improved when compared with concrete specimens,and the ultimate bearing capacity of composite specimens is lower than that of concrete specimens in monotonic compression test,but the ductility is far greater than that of concrete specimens.Through the numerical simulation of the finite elementsoftware,the results of the fracture performance test of the composite specimens are well reduced,which proves that the composite materials have excellent mechanical properties and energy dissipation properties.