Theoretical Analysis And Experimental Study Of The Dynamic Characteristics Of WPC Based On SHPB

WPC (Wood Plastic Composites, Acronym WPC) based on primary biomass materials wood fiber, wood shavings, wood flour, vegetable fiber, etc. with a certain percentage of thermoplastics by some special processing treatment. Widely used in automotive, gardening, transportation, military engineering and other industries, comparing with the traditional wood flooring and furniture wood-plastic composite material is not free of formaldehyde, benzene and other harmful to human health of toxic gas giant, it is a healthy and environmentally friendly home security material, wood-plastic composite has a wide range of sources of raw materials, and it also can be recycled for the second using. It is also an important consideration in the selection for the industy. So people also increased the wood-plastic composite materials research and development efforts, and has made substantial progress in many areas, its application has become the trend of accelerated development. Whether metal materials (alloys, steel, etc.) or non-metallic materials (ceramics, rocks, rubber, etc.), Dynamic mechanical properties of the material itself has been a hot research field, For example, in the aerospace field, experimental study on the dynamic mechanical properties of metal-like material can effectively simulate spacecraft outer space damaged state speed after impact, The WPC as a new type of environmentally friendly materials, its good physical properties of the material itself more and more used in furniture, decoration materials, urban greening, packaging, transportation, car seats and interiors industries, Study on WPC deeper level is particularly important.In this paper, with the impact Hopkinson bar (SHPB) depth exploration transient loading on WPC, and then study the impact damage behavior of wood-plastic composites and dynamic mechanical properties. So that such material can be better and more secure applications. Currently SHPB technology is the mechanical properties of the test material at high strain rates and other aspects of the most favorable experimental tools, measuring methods SHPB measure used in the experiment clever avoided The specimens were tested directly caused by the specimen shock and some other instability, the test system by monitoring both ends of the test piece clamp bar the stress waveform and propagation, then according to the time displacement of one-dimensional stress wave theory to determine the stress test piece, and then the dynamic equilibrium condition can be obtained under local time stress-strain relationship. By the results of crash tests conducted by different pressures of the gas emitted from the impact rod WPC and its corresponding data to explore the material itself will destroy the deformation and deformation process takes place under what conditions. Finite element analysis software ABAQUS simulation analysis of the impact of transient processes in impact dynamics module Explicit establish constitutive model of such material, analysis the evolution of the WPC deformation under shock loading destruction.