公开(公告)号：US11168380B2

公开(公告)日：2021-11-09

申请号：US17058644

申请日：2020-07-09

申请人： UNIVERSITY OF SHANGHAI FOR SCIENCE AND TECHNOLOGY

发明人： Xi Lu ,  Hanguang Liu ,  Lei Tian ,  Hong Wang ,  Jiawei Huang

IPC分类号： G06F30/20 ,  G06F30/17 ,  C21D11/00 ,  G06F119/14

摘要： To solve the technical problem of the incapacity to perform a quantitative matching design of residual compressive stress in the process of prior structural cold working-residual compressive stress design, the invention provides a method of structural cold working-residual compressive stress distribution quantitative matching design, characterized by treating the fatigue strength of a mechanical structure and parts as a field, and matching a structural stress field and a fatigue strength field organically, to quantitatively match the residual compressive stress in conjunction with characteristics of the cold working process. The method specifically includes determination of the maximum stress amplitude and a gradient distribution thereof at a dangerous position of the structure, determination of an ideal fatigue strength distribution of the dangerous cross-section of the structure, determination of a fatigue strength field according to curves of end quenching tests for material and a requirement for heat treatment, determination of the limit of the residual compressive stress according to characteristics of the structural cold working process, and determination of an actual residual compressive stress distribution of the dangerous cross-section in conjunction with cold working and the fatigue strength distribution.

公开(公告)号：US11270045B2

公开(公告)日：2022-03-08

申请号：US16964622

申请日：2020-03-13

申请人： UNIVERSITY OF SHANGHAI FOR SCIENCE AND TECHNOLOGY

发明人： Xi Lu

IPC分类号： G06F30/20 ,  G06F30/17 ,  G06F30/13 ,  G06F119/14

摘要： Aiming at a hardness mismatch phenomenon in the existing structure hardness design process according to an integral intensity viewpoint, the invention provides a quantitative matching design method for structure heat treatment-hardness distribution. The specific method comprises determining an ideal static intensity field distribution of the dangerous section of the structure according to a limit static stress distribution of a dangerous section of the structure; determining an ideal hardness distribution of the dangerous section of the structure by utilizing an intensity-hardness conversion relation; determining heat treatment requirements such as surface hardness, core hardness and the like by combining material and heat treatment mode; determining an actual hardness distribution of the dangerous section of the structure according to a material end quenching curve and the heat treatment requirement.