Lattice Screening and Relative Strength Lattice Filling Method Considering Energy Absorbing Stiffness

Abstract

The present invention provides a lattice screening and relative strength lattice filling method considering energy absorption stiffness. In this method, through comprehensive quantitative evaluation of lattice structure stiffness and energy absorption capacity, different lattice types can be selected intuitively and accurately. Screen out the lattice configuration with the best balance between energy absorption capacity and stiffness; in the method, the relative strength of the lattice is obtained through the finite element analysis of the lattice structure and the entity to obtain the stress distribution information, and the relative strength is easy to obtain. The stress distribution is linked with the lattice filling rate, which provides a guiding standard for the filling of variable density lattices.

Description

technical field [0001] The invention belongs to the technical field of structural lightweight design, and specifically relates to a lattice screening and relative strength lattice filling method considering energy-absorbing stiffness. Background technique [0002] Lightweight is a goal that has been pursued in the aerospace field. Every reduction in the weight of the parts on the aircraft will save the aircraft a lot of fuel consumption and improve the performance of the aircraft. Statistics show that every 1% reduction in aircraft weight can improve aircraft performance by 3%-5%, so weight has become one of the important indicators to measure the advanced nature of aircraft. At present, the ways to achieve lightweight mainly include materials, structural design and structural manufacturing. However, the research on new lightweight materials is often difficult to achieve significant results in a short period of time, and structural design and lightweight manufacturing have...

AI Technical Summary

Problems solved by technology

In order to overcome the shortcomings of long processing cycle and waste of materials when printing dense metal parts, it can be designed to be hollow and filled with dot matrix materials according to the mechanical performance requirements of the parts

However, if the filling rate of the lattice replacement entity is too high, the material utilization will be insufficient and the lightweight effect will be poor; if the filling rate of the lattice replacement entity is too low, the structural strength after filling will be too low, which will affect the normal structure Work

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