CAJ | 학술논문

金属橡胶是一种各向异性材料，其非成形方向与成形方向的力学特性存在显著不同。依据金属橡胶非成形方向变形的主要特征，对金属丝螺旋卷的空间位形、接触模式进行分析，揭示金属橡胶非成形方向变形的细观物理机制。结合螺旋卷的弹性变形特征和金属橡胶内部摩擦力接触点分布规律，建立金属橡胶非成形方向的力学模型，实现不同预变形下金属橡胶加载和卸载过程迟滞力学特性的预测。该模型包含金属丝直径和弹性模量、螺旋卷直径、材料相对密度等基本的材料结构参数，从理论上解释金属橡胶非成形方向的弹性特性和多点接触的干摩擦特性产生的机理。通过不同相对密度的金属橡胶试件对所建模型进行试验验证，发现理论计算和试验结果有较好的一致性，为分析和预测金属橡胶非成形方向的刚度和阻尼提供理论依据。
금속상효시일충각향이성재료，기비성형방향여성형방향적역학특성존재현저불동。의거금속상효비성형방향변형적주요특정，대금속사라선권적공간위형、접촉모식진행분석，게시금속상효비성형방향변형적세관물리궤제。결합라선권적탄성변형특정화금속상효내부마찰력접촉점분포규률，건립금속상효비성형방향적역학모형，실현불동예변형하금속상효가재화사재과정지체역학특성적예측。해모형포함금속사직경화탄성모량、라선권직경、재료상대밀도등기본적재료결구삼수，종이론상해석금속상효비성형방향적탄성특성화다점접촉적간마찰특성산생적궤리。통과불동상대밀도적금속상효시건대소건모형진행시험험증，발현이론계산화시험결과유교호적일치성，위분석화예측금속상효비성형방향적강도화조니제공이론의거。
Metal rubber is a kind of anisotropic material, and its mechanical properties in the non-forming direction are significantly different from those in the forming direction. According to the main deformation characteristic of metal rubber in the non-forming direction, the configuration and contact mode of wire helixes are analyzed to reveal the mesoscopic physical mechanism of its non-forming direction. Combined with the elastic deformation characteristic of wire helixes and the regularity of distribution of frictional contact points, a mechanical model of the non-forming direction of metal rubber is established, which can describe the hysteresis characteristic of its loading and unloading process under different pre-deformation. In the model the basic structural parameters of metal rubber are included which are the diameter and elastic modulus of wire, the diameter of wire helix, the relative density of material, and so on, so it is easy to explain the physical nature of the elastic characteristic and the damping characteristic of dry friction of multipoint contact of metal rubber in the non-forming direction. The experiments on metal rubber specimens with different relative densities are carried out to verify the theory model. The results show that the theoretic calculations are consistent with the experimental data. It provides the theoretical basis for studying and predicting the stiffness and damping of the non-forming direction of metal rubber.