Abstract: [Objective] This paper investigated the mechanical properties of neck collar made of micron wood fiber and stimulated the numerical values of the neck collar under the load by external force, and analyzed the numerical values to determine if the neck collar can meet the strength requirement when it applied on human body.[Method] The Pinus koraiensis wood fiber with the diameter of 16 μm was used to prepare the test specimen in this paper. The three-point bending mechanical tests were applied on this micron wood fiberboard, its microstructure was characterized by scanning electron microscopy (SEM). ABAQUS program was used to simulate the compression and impact property of micron wood fiber neck collar and analyzed the simulation result.[Result] The results showed that micron wood fiber neck collar from inside to the outside along the curved surface corresponding to the upper neck length, and bearing capacity of back neck collar was slightly higher than that of front neck collar. Anti-pressure capacity of the micron wood fiber neck collar's compression from outside to the inside along side curved surface was higher than that of compression from inside to the outside along the curved surface corresponding to the upper neck length. Damage degree of micron wood fiber neck collar under low velocity impact was studied by applying different impact energies to the sample, the results revealed that the impact damage increased with the increasing of impact energy.[Conclusion] The value of mechanical properties in neck collar determined by finite element stimulation was similar to that by three-point bending test, indicating the rationality of the experiment. The maximum bear stress of the neck collar was 30 MPa and met the requirements on human body.

Key words: micron wood fiber, neck collar, finite element, mechanics property