This invention provides a modeling method for the
shear force of a crescent-shaped shear blade, comprising the following steps: 1) expanding and parameterizing the theoretical shear blade arc into a function based on its formation process; 2) calculating the slope of each point on the arc; 3) determining the
shear angle at each point on the arc based on the slope in step 2); 4) calculating the Nosari
shear force using the shear blade shear's Nosari formula; 5) calculating the
shear force at each point on the arc based on step 4); and 6) identifying the point with the maximum shear force within the range of the arc's values as the design basis for the crescent-shaped shear blade. The data used in this modeling process are readily available, thus avoiding the
impact of measurement errors on the shear force data, resulting in high calculation
accuracy and precision. This invention solves the modeling problem for calculating the shear force of a crescent-shaped shear blade, transforming a complex model into a simple one, saving time, and offering low cost and high flexibility.