在不同的方向 (CHAL-AMB2022-04-MaTTO) 和预测总结上,AM Bench 2022宏观拉伸挑战
Newell Moser1, Jake Benzing1, Orion L Kafka1
1Material Measurement Laboratory, National Institute of Standards and Technology, 325 Broadway St, Boulder, 80305, CO, USA.
Integrating materials and manufacturing innovation
|March 14, 2024
概括
这项研究对来自激光粉床融合的IN625合金机械性能进行了基准预测. XY扫描策略产生了比X-only更强的零件,并且属性随着方向而变化非线性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 由于工艺变化,IN625合金的增材制造 (AM) 在预测机械性能方面存在挑战.
- 激光粉床融合 (LPBF) 是一种关键的AM技术,但扫描策略会影响材料异构性.
- 了解和预测压力-应变行为对于可靠的AM元件设计至关重要.
研究的目的:
- 为了对IN625合金的机械性能进行计算模型的预测准确度进行基准测试.
- 为了研究不同激光扫描策略 (X-only vs. XY raster) 对材料异性质的影响.
- 评估拉伸样本与构造方向相对的方向对测量属性的影响.
主要方法:
- 建立了一个基准测试挑战,涉及预测平均应力-应变特性.
- 参与者使用了提供的粒度结构和基线机械数据 (X-only vs. XY扫描策略).
- 模型被评估了它们预测各种方向的最终抗拉强度和其他属性的能力.
主要成果:
- 机械性能显示与拉伸方向的非线性变化.
- XY扫描策略标本显示出较高的产量强度与X-only标本相比,无论方向.
- 没有一个单一的建模方法在所有预测任务中表现出色,只有X的策略预测证明特别具有挑战性.
结论:
- 激光扫描策略显著影响LPBF IN625.2的机械异构性.
- 准确预测AM材料的行为需要复杂的建模,特别是复杂的扫描模式.
- 基准数据集是公开可用的,以促进AM材料建模的进一步研究.
相关概念视频
01:15Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
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Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
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01:29Three-Dimensional Analysis of Strain
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Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
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01:22Generalized Hooke's Law
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The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
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01:15Stress: General Loading Conditions
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To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
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01:26Hooke's Law
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Hooke's law, a pivotal principle in material science, establishes that the strain a material undergoes is directly proportional to the applied stress, defined by a factor called the modulus of elasticity or Young's modulus.
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01:18Transformation of Plane Stress
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Studying stress transformation is essential in understanding how stress components within a material, like a cube under plane stress, change with rotation. This change is analyzed by considering a prismatic element within the cube. As the element rotates, the stress components acting on it—both normal and shearing stresses—change in magnitude and orientation. This change is quantified using trigonometric functions of the rotation angle, relating the forces acting on the rotated element's...
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