Creep-plasticity interaction in high-temperature reactor materials

时间无关(塑性)和时间相关(蠕变)变形是复杂的过程，已被证明是相互作用的。这些过程发生在核反应堆中，它们的相互作用导致复杂的热机械加载。我的研究是探索这种相互作用，以提高对它的理解。这种更好的理解可以用于计算方法，特别是热力有限元模拟。我目前的工作是探索一种新的方法，利用宏观(Mm)模拟来驱动微尺度的晶体塑性模拟。这种微观几何可以位于宏观几何中的任何位置，因此提供了在宏观几何中的任何位置探索微观机械的能力。通过用这种方法实现蠕变模型，可以在微观尺度上探索蠕变和塑性变形。

Time-independent (Plastic) and time-dependent (Creep) deformation are complex processes thathave been shown to interact with one another. These processes occur in nuclear reactors and theirinteraction leads to complex thermomechanical loading. My research is exploring this interactionin order to improve understanding of it. This improved understanding can be utilised incomputational methodologies, specifically thermomechanical finite element simulations. Mycurrent work is exploring a novel methodology which utilises macro-scale (mm) simulations todrive microscale crystal plasticity simulations. This micro-scale geometry can be locatedanywhere in the macro-scale geometry, hence providing the ability to explore the micromechanicsat any location in the macro-scale geometry. By implementing creep models with thismethodology, creep and plastic deformation can be explored at the microscale.