Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 103924 |
| Seitenumfang | 15 |
| Fachzeitschrift | Advances in engineering software |
| Jahrgang | 206 |
| Frühes Online-Datum | 13 Apr. 2025 |
| Publikationsstatus | Veröffentlicht - Aug. 2025 |
Abstract
The variational damage model (VDM), formulated within a variational framework, provides an effective and computationally efficient approach to fracture modeling. However, existing implementations primarily rely on custom-developed codes, which limits their accessibility and broader adoption in engineering applications. To address this limitation, this study integrates newly developed variational damage models into the commercial finite element software LS-DYNA, enabling their practical use in large-scale simulations. Building upon the VDM and the novel variational damage model (NVDM) proposed by Ren et al. (2024), this work develops user-defined material subroutines (UMATs) for LS-DYNA: (i) UMAT-VDM: A variational damage model. (ii) UMAT-NVDM: An enhanced variational damage model incorporating a threshold parameter. The effectiveness of these implementations is assessed through a series of quasi-static and dynamic fracture simulations. The results demonstrate that both UMAT-VDM and UMAT-NVDM accurately capture sharp crack interfaces while maintaining computational efficiency due to the absence of gradient terms. Additionally, UMAT-NVDM produces finer crack patterns and exhibits improved capability in modeling complex fracture processes compared to UMAT-VDM. To facilitate further research and application, the open-source implementation of these subroutines, written in free-format FORTRAN90 syntax, is publicly available on GitHub at https://github.com/yaduann/vdm-and-nvdm.
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in: Advances in engineering software, Jahrgang 206, 103924, 08.2025.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - An open-source LS-DYNA implementation of the variational damage model
AU - Duan, Ya
AU - Zhuang, Xiaoying
AU - Ren, Huilong
AU - Rabczuk, Timon
N1 - Publisher Copyright: © 2025
PY - 2025/8
Y1 - 2025/8
N2 - The variational damage model (VDM), formulated within a variational framework, provides an effective and computationally efficient approach to fracture modeling. However, existing implementations primarily rely on custom-developed codes, which limits their accessibility and broader adoption in engineering applications. To address this limitation, this study integrates newly developed variational damage models into the commercial finite element software LS-DYNA, enabling their practical use in large-scale simulations. Building upon the VDM and the novel variational damage model (NVDM) proposed by Ren et al. (2024), this work develops user-defined material subroutines (UMATs) for LS-DYNA: (i) UMAT-VDM: A variational damage model. (ii) UMAT-NVDM: An enhanced variational damage model incorporating a threshold parameter. The effectiveness of these implementations is assessed through a series of quasi-static and dynamic fracture simulations. The results demonstrate that both UMAT-VDM and UMAT-NVDM accurately capture sharp crack interfaces while maintaining computational efficiency due to the absence of gradient terms. Additionally, UMAT-NVDM produces finer crack patterns and exhibits improved capability in modeling complex fracture processes compared to UMAT-VDM. To facilitate further research and application, the open-source implementation of these subroutines, written in free-format FORTRAN90 syntax, is publicly available on GitHub at https://github.com/yaduann/vdm-and-nvdm.
AB - The variational damage model (VDM), formulated within a variational framework, provides an effective and computationally efficient approach to fracture modeling. However, existing implementations primarily rely on custom-developed codes, which limits their accessibility and broader adoption in engineering applications. To address this limitation, this study integrates newly developed variational damage models into the commercial finite element software LS-DYNA, enabling their practical use in large-scale simulations. Building upon the VDM and the novel variational damage model (NVDM) proposed by Ren et al. (2024), this work develops user-defined material subroutines (UMATs) for LS-DYNA: (i) UMAT-VDM: A variational damage model. (ii) UMAT-NVDM: An enhanced variational damage model incorporating a threshold parameter. The effectiveness of these implementations is assessed through a series of quasi-static and dynamic fracture simulations. The results demonstrate that both UMAT-VDM and UMAT-NVDM accurately capture sharp crack interfaces while maintaining computational efficiency due to the absence of gradient terms. Additionally, UMAT-NVDM produces finer crack patterns and exhibits improved capability in modeling complex fracture processes compared to UMAT-VDM. To facilitate further research and application, the open-source implementation of these subroutines, written in free-format FORTRAN90 syntax, is publicly available on GitHub at https://github.com/yaduann/vdm-and-nvdm.
KW - Crack propagation
KW - Damage mechanics
KW - Dynamic fracture
KW - Fracture
KW - LS-DYNA
KW - Variational principle
UR - http://www.scopus.com/inward/record.url?scp=105002311447&partnerID=8YFLogxK
U2 - 10.1016/j.advengsoft.2025.103924
DO - 10.1016/j.advengsoft.2025.103924
M3 - Article
AN - SCOPUS:105002311447
VL - 206
JO - Advances in engineering software
JF - Advances in engineering software
SN - 0965-9978
M1 - 103924
ER -