A parametric functional gradient cubic lattice structure design method and material
A functional gradient and cubic lattice technology, applied in design optimization/simulation, electrical digital data processing, instruments, etc., can solve problems affecting the accuracy and reliability of parts, material surface or deep deformation, crushing, etc., to reduce Effects of stress concentration, reasonable distribution of materials, improvement of cushioning effect and energy absorption characteristics
Active Publication Date: 2020-05-08
NAT UNIV OF DEFENSE TECH
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The technical problem to be solved by the present invention is to solve the problems of deformation, crushing and fracture on the surface or deep layer of the material under the action of dynamic loads such as vibration and impact on the existing lattice structure material, which seriously affects the accuracy and reliability of the parts. A parameterized functional gradient cubic lattice structure design method and material are proposed to reduce stress concentration, make structural deformation and energy dissipation tend to be uniform, and improve material anti-vibration and impact resistance.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0036] Figure 1 to Figure 6 A specific embodiment of a method for designing a parameterized functionally graded cubic lattice structure of the present invention is shown, as figure 1 with figure 2 As shown, the design method includes the following steps:
[0037] Step 1: Obtain the load parameters of the working conditions that the geometric structure of the continuum needs to bear, as well as the lattice cell type of the geometric structure of the continuum, and the main design parameters of a single cell , Indicates the side length dimension of the cell enveloping cube, Indicates the dimension of the side length of the section of the cell member; for example Figure 5 As shown in (a), the bottom end of the regular cuboid structure is fixed, and the upper end bears the impact load ( , ), the design domain length ,width ,high , the material is aluminum, the elastic modulus E=70GPa, and the weight reduction requirement of the given structure is about 60%. Th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a design method and material for a parameterized functional gradient cubic lattice structure, comprising: 1. obtaining working condition load parameters required by the continuum geometric structure; 2. performing impact performance simulation analysis on the continuum geometric structure, Obtain the stress distribution law, and establish a density gradient distribution function according to the stress distribution law; 3. Layer the continuum geometric structure, and perform gradient penalty calculation on the lattice cell member size of each layer according to the density gradient distribution function, 4. According to the size of each layer of lattice cell rods, the lattice cells are generated and cyclically assembled, and the functional gradient lattice structure material model is obtained. The present invention makes the lattice cell size and relative density change continuously along the height direction in a gradient through the density function, the material distribution tends to be in the area with large stress, the structural deformation and stress distribution tend to be uniform, and compared with the uniform lattice structure, Material distribution is more reasonable.
Description
technical field [0001] The invention belongs to the technical field of structural lightweight and lightweight functional materials, and in particular relates to a design method and material for a parameterized functional gradient cubic lattice structure. Background technique [0002] In the field of military unmanned equipment and aerospace, lightweight structure is an important technical way to reduce the weight of equipment, improve mobility and reduce costs. Due to its structural characteristics such as high porosity, low relative density, and periodic arrangement, lattice structure materials have performance advantages such as light weight, high specific stiffness, and high specific strength, and have important applications in the lightweight design of product equipment structures value. Among many lattice structure materials, the cubic lattice structure has good designability and adaptability because its envelope space is a standard cube and the shape of the cell struc...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/23G06F119/14
Inventor 李国喜赵存张萌罗伟蓬
Owner NAT UNIV OF DEFENSE TECH