Details
| Original language | English |
|---|---|
| Pages (from-to) | 2287-2299 |
| Number of pages | 13 |
| Journal | International Journal of Advanced Manufacturing Technology |
| Volume | 104 |
| Issue number | 5-8 |
| Early online date | 2 Jul 2019 |
| Publication status | Published - Oct 2019 |
Abstract
The application of high-frequency vibration on the incremental forming process could cause changes in the plasticity of material which may contribute to the reduction of forming force, the increase of formability, and the improvement of surface finish. The present work aims to deepen the understanding of the softening effect to facilitate the accurate prediction of the ultrasonic-assisted forming process. First, a theoretical model describing the relationship between the stress and strain during the ultrasonic-assisted incremental sheet forming (UISF) was established based on the theory of crystal plasticity. In particular, the acoustic softening effect was reflected by adjusting the thermal activation process and the dislocation density evolution process. Then, the constitutive model parameters were identified through the back propagation (BP) neural network based on the experimental results. In addition, the developed model was used to simulate the UISF process by ANSYS/LS-DYNA software, and the effect of ultrasonic vibration on the deformation behavior was revealed. The results show that the FE model with the modified constitutive model considering the softening effect can improve the prediction accuracy.
Keywords
- Acoustic softening, Constitutive model, Finite element simulation, Incremental sheet forming, Ultrasonic-assisted forming
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Computer Science(all)
- Software
- Engineering(all)
- Mechanical Engineering
- Computer Science(all)
- Computer Science Applications
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: International Journal of Advanced Manufacturing Technology, Vol. 104, No. 5-8, 10.2019, p. 2287-2299.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Constitutive modeling and deformation analysis for the ultrasonic-assisted incremental forming process
AU - Li, Yanle
AU - Cheng, Zinan
AU - Chen, Xiaoxiao
AU - Long, Yangyang
AU - Li, Xiaoqiang
AU - Li, Fangyi
AU - Li, Jianfeng
AU - Twiefel, Jens
N1 - Funding Information: This work is financially supported by National Natural Science Foundation of China (51605258), Postdoctoral Innovation Project of Shandong Province (201701011), Young Scholars Program of Shandong University (2018WLJH55), and State Key Laboratory of High Performance Complex Manufacturing, Central South University (Kfkt2017-04).
PY - 2019/10
Y1 - 2019/10
N2 - The application of high-frequency vibration on the incremental forming process could cause changes in the plasticity of material which may contribute to the reduction of forming force, the increase of formability, and the improvement of surface finish. The present work aims to deepen the understanding of the softening effect to facilitate the accurate prediction of the ultrasonic-assisted forming process. First, a theoretical model describing the relationship between the stress and strain during the ultrasonic-assisted incremental sheet forming (UISF) was established based on the theory of crystal plasticity. In particular, the acoustic softening effect was reflected by adjusting the thermal activation process and the dislocation density evolution process. Then, the constitutive model parameters were identified through the back propagation (BP) neural network based on the experimental results. In addition, the developed model was used to simulate the UISF process by ANSYS/LS-DYNA software, and the effect of ultrasonic vibration on the deformation behavior was revealed. The results show that the FE model with the modified constitutive model considering the softening effect can improve the prediction accuracy.
AB - The application of high-frequency vibration on the incremental forming process could cause changes in the plasticity of material which may contribute to the reduction of forming force, the increase of formability, and the improvement of surface finish. The present work aims to deepen the understanding of the softening effect to facilitate the accurate prediction of the ultrasonic-assisted forming process. First, a theoretical model describing the relationship between the stress and strain during the ultrasonic-assisted incremental sheet forming (UISF) was established based on the theory of crystal plasticity. In particular, the acoustic softening effect was reflected by adjusting the thermal activation process and the dislocation density evolution process. Then, the constitutive model parameters were identified through the back propagation (BP) neural network based on the experimental results. In addition, the developed model was used to simulate the UISF process by ANSYS/LS-DYNA software, and the effect of ultrasonic vibration on the deformation behavior was revealed. The results show that the FE model with the modified constitutive model considering the softening effect can improve the prediction accuracy.
KW - Acoustic softening
KW - Constitutive model
KW - Finite element simulation
KW - Incremental sheet forming
KW - Ultrasonic-assisted forming
UR - http://www.scopus.com/inward/record.url?scp=85068779260&partnerID=8YFLogxK
U2 - 10.1007/s00170-019-04031-3
DO - 10.1007/s00170-019-04031-3
M3 - Article
AN - SCOPUS:85068779260
VL - 104
SP - 2287
EP - 2299
JO - International Journal of Advanced Manufacturing Technology
JF - International Journal of Advanced Manufacturing Technology
SN - 0268-3768
IS - 5-8
ER -