收益率位指数对在商业纯的深度提取过程中提取预测的影响
Lukas Gassler1,2, Andreas Hirsch3, Mohamadreza Afrasiabi3
1Advanced Manufacturing Lab, ETH Zurich, 8005, Zurich, Switzerland. gasslerl@ethz.ch.
Scientific reports
|November 11, 2025
概括
Yld2000-2D模型指数显著影响板成型模拟. 较高的指数值,如10,提高了准确性,强调了六角密封合金的特定材料校准.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算力学 计算力学 计算力学
背景情况:
- Yld2000-2D收益率位置对于模拟金属板成型中的异型塑性至关重要.
- 在Yld2000-2D模型中,指数"a"决定了产率表面的形状,固定值通常用于BCC和FCC材料.
- 六角密封 (HCP) 金属,如,由于明显的异构和复杂的硬化,缺乏普遍的"a"值,因此存在挑战.
研究的目的:
- 研究Yld2000-2D指数'a'对商业纯板的成型行为建模的影响.
- 将有限元 (FE) 模拟与实验抽取数据进行比较,以评估不同"a"值的准确性.
- 为了评估增强Yld2000-2D模型的有效性,以增强变异性变化的应变依赖系数.
主要方法:
- 使用Yld2000-2D收益率位置模型进行了有限元 (FE) 模拟.
- 在商用纯板上进行的杯拉试验中的实验性吸入配置文件被用于验证.
- Yld2000-2D模型得到了应变依赖系数的增强,以捕捉变形过程中不断演变的异构性.
主要成果:
- 模拟表明,在Yld2000-2D模型中,人们明显偏好更大的指数值.
- 与实验数据相比,'a' = 10 的指数值产生了最准确的预测.
- 通过增加应变依赖系数来增强模型,改善了对异型态行为的模拟.
结论:
- 对Yld2000-2D指数"a"的特定材料校准对于准确模拟等HCP合金至关重要.
- 建议使用更大的指数值来提高板成型模拟的预测准确度.
- 该研究提供了可操作的见解,用于增强对异性质材料的金属板成型的计算模型.
更多相关视频
08:42Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes
Published on: April 10, 2017
20.5K
07:40A Novel Biaxial Testing Apparatus for the Determination of Forming Limit under Hot Stamping Conditions
Published on: April 4, 2017
7.9K
相关概念视频
01:25Yield Criteria for Ductile Materials under Plane Stress
459
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
The Maximum Shearing Stress Criterion, also known as...
459
01:24Stress-Strain Diagram - Ductile Materials
1.9K
The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
1.9K
01:15Thin-Walled Hollow Shafts
522
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution of...
522
01:18Stress Concentrations in Circular Shafts
524
Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
524
01:21Plastic Behavior
509
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
509
01:24Circular Shafts - Elastoplastic Materials
440
The study of solid circular shafts under stress shows that within the elastic limit, stress increases directly to the distance from the shaft's center. This relationship holds until the shaft reaches a critical point of stress, beyond which it begins to yield, marking the transition from elastic to plastic deformation. At this crucial juncture, the maximum torque the shaft can endure without permanent deformation is determined, signifying the limit of its elastic behavior.
As torque on the...
As torque on the...
440