arXiv：cs.LG· Han Zhang, Mehrisadat Makki Alamdari, Babak Shahbodagh, Mohammad Vahab, Cosmin Anitescu, Timon Rabczuk, Elena Atroshchenko·· 4 小时前AI 评分35
扩展深度能量法实现热-力耦合裂纹扩展
An extended deep energy method for thermo-mechanical crack propagation
AI 导读
研究者提出一种扩展深度能量方法，用两个神经网络分别表示温度与位移场，通过跨裂纹不连续的标量嵌入函数让裂纹保持为尖锐折线，并在裂纹尖端用 Williams 展开对位移进行加料。两个场以交错方式最小化增量热传导泛函与热弹性势能得到，应力强度因子经交互积分提取。在静态热边缘裂纹上，提取的应力强度因子与已发表值吻合至 0.11%。
正文
Abstract:Thermo-mechanical fracture couples transient heat conduction on a cracked domain with a crack that grows as the temperature and the displacement evolve. Neural energy solvers have been proposed for phase-field fracture and later extended to represent a sharp crack through the network input, but heat conduction on the cracked domain and crack propagation under the resulting thermal stresses have not yet been treated together in these solvers. We present an extended deep energy method for thermo-mechanical crack propagation in which the crack remains a sharp polyline. Two networks represent the temperature and the displacement and receive the crack through a scalar embedding function, discontinuous across the crack and smooth elsewhere, so that both fields can jump across it without a regularization length, and the displacement is enriched near the tip by the Williams expansion with trainable amplitudes. The two fields are obtained by minimizing an incremental conduction functional and the thermoelastic potential energy in a staggered sequence, with Monte Carlo integration on points stratified over background elements, densified near the tip and redrawn during training. The stress intensity factors are extracted by the interaction integral with the area term of Wilson and Yu and checked by a sweep of the contour radius, and the crack advances at the maximum hoop stress angle when the energy release rate of the kink reaches the critical value at the crack-tip temperature. On a stationary thermal edge crack the extracted stress intensity factor agrees with the published value to 0.11%, in a functionally graded shear test initiation agrees with an independent sharp-crack finite element solution to within one load step, and on a notched cruciform specimen the crack paths follow the published solutions under mechanical, thermal and combined loading.
| Comments: | 48 pages, 20 figures, 10 tables |
| Subjects: | Machine Learning (cs.LG); Materials Science (cond-mat.mtrl-sci); Numerical Analysis (math.NA) |
| Cite as: | arXiv:2610.09433 [cs.LG] |
| (or arXiv:2610.09433v1 [cs.LG] for this version) | |
| https://doi.org/10.48550/arXiv.2610.09433 arXiv-issued DOI via DataCite (pending registration) |
Submission history
From: Elena Atroshchenko [view email]
[v1]
Wed, 7 Oct 2026 04:42:17 UTC (1,986 KB)
来源：arXiv：cs.LG · arxiv.org