Internal source via (ISV) and outside source via (OSV) are two common structures of GaN HEMTs. This letter investigates and models the scalability differences in ISV and OSV gallium nitride high electron mobility transistors (GaN HEMTs). This letter provides detailed model parameters for ISV and OSV devices.

本文开发了一个统一的内部状态变量 (ISV) 模型，用于预测 AZ80 镁合金热加工过程中的组织演变。 所提出模型的一个新方面是，通过将粘塑性流动、位错活动、DRX 成核和边界迁移的演化规律结合到耦合中，考虑了材料硬化、恢复和动态再结晶 (DRX) 对特征变形行为的交互影响。 方式。 基于实验数据分析和基于遗传算法（GA）的目标优化校准模型参数。 预测的流变应力、DRX 分数和平均晶粒尺寸与实验结果吻合良好。 所提出的模型通过用户定义的子程序嵌入到有限元 …

2019年1月1日 · An ISV-based model for recrystallization and grain size evolution is formulated. The model unifies static and dynamic recrystallization with average grain size. The model is successfully validated for polycrystalline metals and minerals. The model captures history sensitive sequential boundary value problems.

2010年9月1日 · Internal state variable (ISV) theory has been growing in its influence over the past 20–30 years. The confluence of increased computing power, finite element method developments, and experimental validation methods have positioned ISV theory to have great impact in the design of thermomechanical structural components and failure analysis.

摘要 提出了一种历史相关和物理驱动的内部状态变量 (isv) 本构模型，该模型同时考虑了静态再结晶、动态再结晶和晶粒尺寸对不同应变率、温度和压力下机械行为的影响。

2024年8月24日 · Internal state variables (ISV) model establishes a relationship between the formability and the microstructural variables, which can effectively describe the deformation characteristics of materials under different micro-physical mechanisms [21].

2024年5月17日 · We present a macroscale constitutive model that couples magnetism with thermal, elastic, plastic, and damage effects in an Internal State Variable (ISV) theory. Previous constitutive models did not include an interdependence between the internal magnetic (magnetostriction and magnetic flux) and mechanical fields.

We describe how the Bammann internal state variable (ISV) constitutive approach, which has proven highly successful in modelling deformation processes in metals

2023年7月17日 · An internal state variable (ISV)-based constitutive model has been used within a Lagrangian finite element analysis (FEA) framework to simulate ballistic impact of monolithic rolled homogenous armor (RHA) steel plates by RHA steel spheres and cylinders.

2024年8月11日 · We present a corrosion internal state variable (ISV) damage model based upon the integrated computational materials engineering (ICME) hierarchical multiscale paradigm. Structure–property experiments for magnesium alloys were used where the only inputs were the volume fractions of each element of the periodic table.