TY - JOUR

T1 - Combined experimental–numerical study on residual stresses induced by a single impact as elementary process of mechanical peening

AU - Sandmann, Paul

AU - Nielsen, Marc André

AU - Keller, Sören

AU - Maawad, Emad

AU - Staron, Peter

AU - Klusemann, Benjamin

N1 - Funding Information: We acknowledge Deutsches Elektronen-Synchroton (DESY), Germany, for the provision of the synchrotron radiation facilities at beamline P07B of Helmholtz-Zentrum Geesthacht. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. Publisher Copyright: © 2020 The Authors. Strain published by John Wiley & Sons, Ltd

PY - 2020/8/1

Y1 - 2020/8/1

N2 - Peening processes can be used as a fatigue enhancement treatment for metallic structures by locally introducing compressive residual stresses. A combined experimental–numerical study on a single-impact process with a drop tower on the aluminium alloy AA5754, representing the elementary process of mechanical peening, has been performed to investigate different impact parameters on the residual stress profile. Residual stresses have been measured using high-energy X-Ray diffraction. A three-dimensional finite element model is used to predict the residual stresses numerically. The elastic strain components from the numerical results are used to calculate residual stresses by assuming either a plane stress or a plane strain state for different specimen thickness to assess the validity of respective assumption. The validity of the numerical simulation is evaluated based on comparisons of the elastic strain profiles and the percentage loss in kinetic energy of the steel ball due to the impact for four different energies, showing overall a good agreement in the experimental–numerical comparisons.

AB - Peening processes can be used as a fatigue enhancement treatment for metallic structures by locally introducing compressive residual stresses. A combined experimental–numerical study on a single-impact process with a drop tower on the aluminium alloy AA5754, representing the elementary process of mechanical peening, has been performed to investigate different impact parameters on the residual stress profile. Residual stresses have been measured using high-energy X-Ray diffraction. A three-dimensional finite element model is used to predict the residual stresses numerically. The elastic strain components from the numerical results are used to calculate residual stresses by assuming either a plane stress or a plane strain state for different specimen thickness to assess the validity of respective assumption. The validity of the numerical simulation is evaluated based on comparisons of the elastic strain profiles and the percentage loss in kinetic energy of the steel ball due to the impact for four different energies, showing overall a good agreement in the experimental–numerical comparisons.

KW - Engineering

KW - aluminium alloys

KW - elementary peening process

KW - finite element analysis

KW - residual stress

KW - single mechanical impact

KW - X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=85084508819&partnerID=8YFLogxK

U2 - 10.1111/str.12338

DO - 10.1111/str.12338

M3 - Journal articles

AN - SCOPUS:85084508819

VL - 56

JO - Strain

JF - Strain

SN - 0039-2103

IS - 4

M1 - e12338

ER -