Initial residual stress measurement based on piecewise calculation methods for predicting machining deformation of aeronautical monolithic components

Release and rebalance of initial residual stress of pre-stretched aluminum alloy plates in processing is the main factor affecting the machining deformation of aeronautic monolithic components. Precision measurement of the initial residual stress is of great significance for predicting and controlli...

Full description

Saved in:
Bibliographic Details
Published in:International journal of advanced manufacturing technology 2020-06, Vol.108 (7-8), p.2063-2078
Main Authors: Fu, Shuailei, Feng, Pingfa, Ma, Yuan, Wang, Liping
Format: Article
Language:English
Subjects:
Aeronautics
Aluminum
Aluminum base alloys
CAE) and Design
Computer-Aided Engineering (CAD
Elastic deformation
Engineering
Finite element method
Industrial and Production Engineering
Interpolation
Machining
Mathematical analysis
Mechanical Engineering
Media Management
Metal plates
Methods
Modulus of elasticity
Original Article
Polynomials
Predictive control
Residual stress
Strain
Stress measurement
Superposition (mathematics)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Release and rebalance of initial residual stress of pre-stretched aluminum alloy plates in processing is the main factor affecting the machining deformation of aeronautic monolithic components. Precision measurement of the initial residual stress is of great significance for predicting and controlling the machining deformation. In this paper, two piecewise calculation methods for calculating the initial residual stress were presented. A test method based on superposition principle of elastic deformation was proposed to calculate the residual stress in the outer layer. Another method to calculate residual stress in the outer layer was crack compliance method using frontal strain instead of back strain. Then, the residual stress in the inner layer was calculated by the crack compliance method, and the influence of the order of interpolation polynomials on the results was studied. The accuracy of the two new methods were verified by finite element simulation and machining experiments. Considering only the initial residual stress, a relatively higher prediction accuracy of machining deformation can be obtained.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-020-05493-6