A lightweight design method for infinite life of structure

Abstract

The invention provides a lightweight design method under the infinite life of the structure. In the design process, the static strength and fatigue strength of the dangerous position of the structureare higher than the value of the structural stress, which is just the ideal design margin, so as to ensure the lightweight of the structure. The stress in the dangerous position of the structure is less than the fatigue limit, which ensures the infinite life of the structure. Through the stress field and static strength field and the lightweight matching design between stress field and fatigue strength field, based on the quantitative matching of static strength field and fatigue strength field, the design and the manufacture are coupled to realize the lightweight design under the infinite life of the structure, which ensures the maximum utilization of structural materials and strength potential under the infinite life of structure.

Description

technical field [0001] The invention relates to the field of infinite life design in mechanical structure design, in particular to a lightweight design method under infinite life of the structure. Background technique [0002] In the prior art, when designing for infinite life, the design method generally adopts reverse design or imitation design, and the shape and size of the designed mechanical structure are relatively large. Stress field and strength are considered in structural design. Stress considers that the stress field is a variable value, but the strength does not consider the strength field. The strength is regarded as the average strength and is a fixed value, resulting in a mismatch between strength and stress field. The lack of coupling in anti-fatigue design and anti-fatigue manufacturing, and the mismatch between anti-fatigue design and anti-fatigue manufacturing have resulted in quantitative matching technology, hardness and residual stress distribution quan...

AI Technical Summary

Problems solved by technology

Stress field and strength are considered in structural design. Stress considers that the stress field is a changing value, but the strength does not consider the strength field. The strength is regarded as the average strength and is a fixed value, resulting in a mismatch between strength and stress field

The lack of coupling in anti-fatigue design and anti-fatigue manufacturing, and the mismatch between anti-fatigue design and anti-fatigue manufacturing have resulted in quantitative matching technology, hardness and residual stress distribution quantitative matching technology, etc. that have not been required for strengthening processes so far, resulting in local excess strength in the structure

Although lightweight design technology can transition from traditional structural weight reduction to new material replacement, the cost is high

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