Method for quickly selecting CFRP three-dimensional mesoscopic cutting simulation mass scaling coefficient

Abstract

The invention discloses a method for selecting a CFRP three-dimensional mesoscopic cutting simulation mass scaling coefficient, belongs to the field of composite material cutting simulation, and relates to a method for selecting a CFRP three-dimensional mesoscopic cutting simulation mass scaling coefficient based on finite element simulation. The method comprises the steps that firstly, a composite material mesoscopic geometric model is established, grids are divided, corresponding material attributes are given to all grid components respectively, and the material direction is defined; in theassembly module, each grid component is imported, and the relative positions of the components are set through translation, rotation and other operations and constraints; contact and boundary conditions are set by adopting a dynamic explicit analysis step; finally, an analysis is submitted. The method is suitable for different cutting speeds; by means of the method, efficient selection of the massscaling coefficient in CFRP three-dimensional mesoscopic cutting at different cutting speeds can be achieved, the calculation efficiency is improved on the premise that the calculation precision is guaranteed, and development perfection of a CFRP three-dimensional mesoscopic cutting model and research of a CFRP cutting mechanism are facilitated.

Description

technical field [0001] The invention belongs to the field of cutting simulation of composite materials, and relates to a method for quickly selecting a quality scaling factor of CFRP three-dimensional mesoscopic cutting simulation based on finite element simulation. Background technique [0002] Carbon fiber reinforced resin matrix composites (CFRP) are widely used in aerospace and other high-end equipment fields due to their excellent mechanical properties. However, due to its heterogeneity and anisotropy, CFRP is frequently damaged during processing, which seriously affects the performance and reliability of parts. Therefore, in order to suppress processing damage from the root, it is necessary to study the processing mechanism of CFRP in depth and analyze the formation mechanism of processing damage. Finite element simulation, especially three-dimensional mesoscopic cutting simulation is the most effective method to study the machining mechanism of composite materials. ...

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Problems solved by technology

However, the cutting speeds used in these literatures are very low, much lower than the milling and drilling speeds commonly used in actual machining

With the further improvement of the model, higher cutting speed needs to be simulated, and more complex factors must be considered. The dynamic effect in the simulation analysis becomes more and more obvious, and it is difficult to satisfy the quasi-static premise.

At this time, it is necessary to re-determine the appropriate mass scaling factor, and the appropriate mass scaling factor can only be selected by calculating a set of models with different mass scaling factors, which requires a lot of calculations and seriously affects the development of the CFRP 3D mesoscopic model and perfection

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