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A Quick Selection Method of Quality Scaling Factor for CFRP 3D Mesoscopic Cutting Simulation

A scaling factor and quality technology, applied in design optimization/simulation, geometric CAD, constraint-based CAD, etc., can solve the problems of low cutting speed, difficult to meet quasi-static premise, affecting the development and improvement of CFRP 3D meso model, etc. To achieve the effect of efficient selection, reduction of experimental work calculation, and simple method

Active Publication Date: 2021-01-19
DALIAN UNIV OF TECH
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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

Method used

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  • A Quick Selection Method of Quality Scaling Factor for CFRP 3D Mesoscopic Cutting Simulation
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  • A Quick Selection Method of Quality Scaling Factor for CFRP 3D Mesoscopic Cutting Simulation

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Embodiment Construction

[0024] The specific implementation of the present invention will be described in detail below in conjunction with the technical scheme and accompanying drawings.

[0025] The present invention is based on ABAQUS finite element simulation calculation software, taking the cutting speed as 1m / s as an example, image 3 For the method flowchart, the concrete steps of the method are as follows:

[0026]Step 1: Establish the geometric model of the mesoscopic part of the composite material, including single fiber, resin, interface, equivalent homogeneous material and tool. Among them, the fiber diameter D is 5.6 μm, the interface thickness h is 0.2 μm, and its length L is 300 μm; the tool rake angle α is 25°, the relief angle β is 5°, and the edge circle radius r is 10 μm. All parts are set as three-dimensional deformable bodies and the hexahedron unit is divided by sweeping method, and the unit size of the cutting area is set to about 0.7 μm, so that the aspect ratio of the unit is ...

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Abstract

METHOD FOR QUICKLY SELECTING THREE-DIMENSIONAL (3D) MICRO-SCALE CUTTING SIMULATION OF CARBON FIBER REINFORCED POLYMER A method for selecting a mass scaling factor for three-dimensional (3D) micro-scale cutting simulation of carbon fiber reinforced polymer (CFRP) in the present invention relates to the field of composite material cutting simulation. In particular, the present invention relates to a method for selecting a mass scaling factor for 3D micro-scale cutting simulation of CFRP based on finite element simulation. The method includes: creating a micro geometric model of a composite material and meshing the model; assigning a corresponding material property to each mesh part, and defining a material direction; importing each mesh part into an assembly module, and setting a relative position between the parts through translation, rotation and other operations and constraints; using a dynamic explicit analysis step; setting contact and boundary conditions; and submitting for analysis. The method is applicable to different cutting velocities. With the method, a mass scaling factor can be efficiently selected in CFRP 3D micro-scale cutting at different cutting velocities, and calculation efficiency can be improved while calculation accuracy is ensured, thereby facilitating development and improvement of a CFRP 3D micro-scale cutting model and research of a CFRP cutting mechanism. ?54130 i

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. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/17G06F111/04
Inventor 王福吉赵翔贾振元王小楠谷天雨张博宇
Owner DALIAN UNIV OF TECH
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