Kaan Inal

Microstructure-informed thermomechanical crystal plasticity damage modeling of dual-phase steels

Sandipkumar Dayani, Waqas Muhammad, Abhijit Brahme, Fatemeh Hekmat et autres

Deep learning based surrogate modeling for crystal-plasticity driven predictions of fracture in aluminum alloys

Johann B. Scheepers, Abhijit Brahme, Fatemeh Hekmat, Trevor Sabiston et autres

A key utility of micromechanical models is as calibration tools for more computationally efficient phenomenological counterparts. This paradigm is primarily driven by the high computational cost of running these micromechanical models. In this paper, a deep operator network was employed to act …

ca, us (code pays fourni par la source)

Coupled crystal plasticity finite element and cellular automata model for simulating dynamic recrystallization in AA3104 aluminium alloy during hot rolling

Jafar Ebadi Rajoli, Abhijit Brahme, Aaditya Lakshmanan, Sazol Das et autres

A three-dimensional coupled crystal plasticity finite element (CPFE)–cellular automata (CA) framework is developed to simulate dynamic recrystallization (DRX) in aluminium alloy AA3104 under hot deformation. The model explicitly accounts for spatial variations in misorientation and dislocation density and directly incorporates real microstructural …

ca, us (code pays fourni par la source)

Decoupling plasticity- and damage-induced property changes by an elasto-plasticity framework coupled with a data-driven damage evolution model

Jan Gerlach, W. Muhammad, A.P. Brahme, Marlon Hahn et autres

In one approach in damage mechanics, deterioration of mechanical properties with plastic deformation is attributed to ductile damage in the form of void nucleation and growth. However, the quantitative relationship between damage and these properties remains unclear, primarily due to the difficulty …

de, ca (code pays fourni par la source)

New fracture criterion for spot welds of advanced high-strength steels

Heng Feng, Christopher DiGiovanni, Cael Johnston, Jidong Kang et autres

Resistance spot welds of advanced high strength steel (AHSSs) are susceptible to various fracture modes associated with distinct fracture paths leading to different loading capacity. To better predict the potential fracture modes and loading capacity of AHSS welds, a new force-based fracture …

ca, us, pl (code pays fourni par la source)

U-PolyConformer: Spatiotemporal machine learning for microstructure engineering

Dylan Budnick, Benhour Amirian, Abhijit Brahme, Haitham El-Kadiri et autres

• A novel spatiotemporal CNN-Transformer machine learning framework is proposed. • The first framework that captures full-field stress and strain evolution under arbitrary loading conditions. • Exhibits strong generalization; accurately capturing loading conditions, microstructures, and hardening outside the training distributions. • A …

ca, us (code pays fourni par la source)

A generalizable machine learning-assisted fast Fourier transform algorithm to simulate the large strain phenomena in polycrystalline materials

Benhour Amirian, Abhijit Brahme, Ricardo A. Lebensohn, Kaan Inal

Machine learning methods have shown initial promise in constitutive modeling for single crystals or homogenized polycrystals , delivering notable computational efficiency. However, existing machine learning-based constitutive models often lack generalizability, limiting their application across diverse boundary value problems . This study introduces …

ca, us (code pays fourni par la source)

Effect of crystal orientation on recrystallization occurrence in CMSX-4

Emile Hazemann, Yancheng Zhang, Kaan Inal, Mujun Long et autres

An experimental study of recrystallized grains (RG) is carried out for the single crystal (SX) nickel-based superalloy CMSX-4 for both isothermal and non-isothermal tensile tests on specimens oriented alongh <100>, <110> and <111> crystallographic orientations. For the isothermal tensile tests coupled with …

fr (code pays fourni par la source)

Towards optimizing the thermal processes in aluminum alloys using a full-field CA based approach for static recrystallization modeling

Abhijit Brahme, Chal-Lan Park, Jeffrey Tschirhart, Aaditya Lakshmanan et autres

A combination of thermal and mechanical processing is used to produce flat rolled aluminum products. Typically, hot rolled sheets undergo significant time at elevated temperatures during coil cooling. This results in static recrystallization. It is important to understand the linkage between the …

ca, us (code pays fourni par la source)

Thermodynamically consistent damage evolution model coupled with rate-dependent crystal plasticity: Application to high-strength low alloy steel at various strain rates

Waqas Muhammad, Abhijit Brahme, Fatemah Hekmat, Trevor Sabiston et autres

• Experimental characterization of HSLA steel is conducted. • Rate sensitive damage evolution model is proposed. • Thermodynamic framework is developed to capture internal temperature rise. • Thermodynamically consistent rate-dependent crystal plasticity damage model is developed and validated. • Stress-strain response and …

ca, us (code pays fourni par la source)

An investigation of rapid surface melting in nanowires

Benhour Amirian, Kaan Inal

The investigation into virtual melting phenomena in nanowires holds significant relevance owing to its profound impact on material durability under extreme loading conditions. Thus, the exploration of this pivotal plastic deformation mechanism is undertaken utilizing the phase-field methodology. Employing a monolithic solver, …

ca (code pays fourni par la source)

Comparative assessment of Ti‐6Al‐4 V titanium alloy fatigue life improvement by vibratory peening, shot peening, and vibratory finishing

Maxime Paques, Apratim Chakraborty, Benoît Changeux, Hong Miao et autres

Abstract The effects of vibratory peening (VP), shot peening (SP), and SP followed by vibratory finishing (SPVF) on the surface and fatigue properties of Ti‐6Al‐4 V were compared to conventional low‐stress grinding (LSG). VP processing produced seven times smoother surface finish than …

ca, fr (code pays fourni par la source)