Validating a Compressive Stress Shot Peening Numerical Simulation by Comparison to Experimentally Found Values
Faculty Mentor
Alex Bae
Presentation Type
Oral Presentation
Start Date
4-14-2026 11:40 AM
End Date
4-14-2026 12:00 PM
Location
PUB 321
Primary Discipline of Presentation
Mechanical Engineering and Technology
Abstract
Shot peening is a process by which a ductile surface is hardened by residual compressive stress imparted by high velocity shot impacts. This compressive stress has been shown to improve the fatigue life of metals by increasing resistance to the initiation and propagation of surface cracks. Although the effectiveness of this method is well established, numerical modeling results have been difficult to obtain and are not widely available. This study is a continuation of previous study with the objective of validating a digital model that replicates the compressive stress generated in a shot-peened aluminum sample. The model was developed using LS-DYNA with a simulated sample of Aluminum 7050-T7451. The model was analyzed using multiple shot impacts with varying velocity and surface coverage on the sample. The compressive stress within each element along unique impact lines would be collected then averaged. The resulting compressive stress field was compared with the experimental results from shot-peened aluminum samples. As the surface coverage increased, a reduction in the range of compressive stress values on the model surface was observed, with the 100% coverage sample model showing the smallest range. A shot velocity of 20 m/s produced the closest match to the compressive stress experimentally measured from the 100% coverage shot-peened sample. The results demonstrate that the model can closely replicate the compressive stress values generated in experimental shot peening.
Recommended Citation
Goodloe, Carter, "Validating a Compressive Stress Shot Peening Numerical Simulation by Comparison to Experimentally Found Values" (2026). 2026 Symposium. 8.
https://dc.ewu.edu/srcw_2026/op_2026/o3_2026/8
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Validating a Compressive Stress Shot Peening Numerical Simulation by Comparison to Experimentally Found Values
PUB 321
Shot peening is a process by which a ductile surface is hardened by residual compressive stress imparted by high velocity shot impacts. This compressive stress has been shown to improve the fatigue life of metals by increasing resistance to the initiation and propagation of surface cracks. Although the effectiveness of this method is well established, numerical modeling results have been difficult to obtain and are not widely available. This study is a continuation of previous study with the objective of validating a digital model that replicates the compressive stress generated in a shot-peened aluminum sample. The model was developed using LS-DYNA with a simulated sample of Aluminum 7050-T7451. The model was analyzed using multiple shot impacts with varying velocity and surface coverage on the sample. The compressive stress within each element along unique impact lines would be collected then averaged. The resulting compressive stress field was compared with the experimental results from shot-peened aluminum samples. As the surface coverage increased, a reduction in the range of compressive stress values on the model surface was observed, with the 100% coverage sample model showing the smallest range. A shot velocity of 20 m/s produced the closest match to the compressive stress experimentally measured from the 100% coverage shot-peened sample. The results demonstrate that the model can closely replicate the compressive stress values generated in experimental shot peening.
