Study On Mechanical Properties Of Super Elastic Shape Memory Alloy Metal Rubber

Rubber is commonly used in vibration damping materials, but there are poor corrosion resistance, easy aging and other issues. The metal rubber which is made of fine metal wire can not only retain the basic mechanical properties of metal, but also has the rubber like elasticity and damping, which can be used to replace the traditional rubber for vibration isolation design. Considering that the super elastic shape memory alloy has strong energy dissipation capacity, this paper uses the shape memory alloy wire to make the metal rubber vibration isolator. Through experiments, focuses on the various factors affecting the mechanical performance of metal rubber, such as molding process, geometric parameter, strain amplitude, loading frequency etc. Based on the test data, the constitutive relation model of metal rubber is established. The metal rubber vibration isolator used in flexible isolation system, consider based flexible and isolator nonlinear, coupling system is established the kinetic model and solution, system of vibration transfer rules and provide theoretical basis and technical support for the vibration control.The results show that the mechanical properties of the shape memory alloy wires are gradually increasing with the increase of the number of cycles. The damping performance of shape memory alloy wire can be improved by increasing strain amplitude and loading rate. The processing technology of shape memory alloy metal rubber and common metal rubber is basically consistent. There is a difference in the processing of stainless steel metal rubber and shape memory alloy metal rubber. Due to the influence of the processing technology of metal rubber can not form a regular shape. Irregular metal rubber can lead to unstable mechanical properties of the small strain amplitude. The equivalent damping ratio of the shape memory alloy metal rubber is greater than stainless steel when they have the same porosity. Strain hardening of metal rubber with increasing strain amplitude. The single cycle energy dissipation increases exponentially with the increase of strain amplitude. The equivalent damping ratio can be obtained at a specific location. The transverse resonance of the basic structure is the main reason for the increase of the transmission rate. More bending modes are excited when the vibration isolation device is not symmetrically installed with respect to the foundation structure. Therefore, in practice, we should try to use the symmetrical arrangement.