Through-thickness resolution, stress oscillations and residual stress in cold rolling

Flanagan F., O'Connor A. N., Erfanian M., Music O., Brambley E. J., O'Kiely D.

European Journal of Mechanics, A/Solids, cilt.114, 2025 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 114
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.euromechsol.2025.105761
  • Dergi Adı: European Journal of Mechanics, A/Solids
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Compendex, INSPEC, Metadex, zbMATH, Civil Engineering Abstracts
  • Anahtar Kelimeler: Cold rolling, Elasticity, Finite element, Plasticity, Residual stress
  • TED Üniversitesi Adresli: Hayır

Özet

Metal rolling is a widespread and well-studied process, and many finite-element (FE) rolling simulations can be found in the scientific literature. However, these FE simulations are typically limited in their resolution of through-thickness variations. In this paper, we carefully assess the accuracy of a number of FE approaches, and find that at least 60 elements through-thickness are needed to properly resolve through-thickness variation; this is significantly more than is used elsewhere in the metal rolling literature. In doing so, we reveal an oscillatory stress pattern, which is not usually observed in simulations but which we can validate by comparison with recent analytical work, and which is completely deterministic, not arising from numerical noise or error. We discuss the physical basis of these oscillations and their implications for outcomes such as curvature in asymmetric rolled sheets. Accurate through-thickness variation of stress and strain will also have implications for modelling of microstructure evolution and damage.