Study on Impeller Fracture Model Based on Vibration Characteristics and Fractal Theory

Table 1

Impeller material properties (density: 7850 kg/m³).

Temperature; (°C)	Elastic module; ×10^5 MPa	Poisson ratio	Yield strength; MPa	Expansion coefficient; ×10^−6/°C
20	2.10	0.276	850	13