在SUS304不钢中进行断裂标准校准和有限元模拟
Menglong Xing1, Yangchao Liu1, Jianwei Lu2
1College of Mechanical Engineering, North China University of Science and Technology, Tangshan 063210, China.
Materials (Basel, Switzerland)
|December 17, 2024
概括
本研究通过有限元分析和拉伸性试验对SUS304不钢的柔性断裂标准进行校准. HYPELA2子程序增强了标准的普遍性,特定的标准显示出不同样本类型的更好的预测准确性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算力学 计算力学 计算力学
背景情况:
- 校准柔性断裂标准对于预测工程应用中的材料故障至关重要.
- SUS304不钢是一种广泛使用的材料,需要精确的断裂建模.
- 现有的有限元软件在解决各种柔性断裂标准方面存在局限性.
研究的目的:
- 为了校准SUS304不钢的柔性断裂标准.
- 使用自定义子程序开发一个通用的柔性骨折标准.
- 通过模拟和实验测试来验证开发的标准.
主要方法:
- 设计和四个拉力样本的有限元建模.
- 对SUS304不钢样品进行单轴拉伸测试.
- 开发和验证HYPELA2子程序的柔性骨折标准.
- 三点曲模拟用于程序验证.
主要成果:
- 有限元模型与实验测试结果有很好的一致性,验证了模型的可行性.
- 使用OH标准和三点曲模拟,确认了HYPELA2子程序开发的正确性.
- 弗洛伊登达尔,C-L和LeRoy标准显示了SH样本的优越预测能力.
- 所有测试的标准都显示出NT20和CH05样本的强大预测能力.
结论:
- 开发的有限元模型和HYPELA2子程序对于校准SUS304不钢的柔性断裂标准是有效的.
- 断裂标准的选择显著影响预测的准确性,这取决于样品几何和负载条件.
- 这项研究提供了一种经过验证的方法,以提高柔性骨折预测的普遍性和准确性.
更多相关视频
07:37Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method
Published on: January 16, 2019
9.6K
08:04Proximal Cadaveric Femur Preparation for Fracture Strength Testing and Quantitative CT-based Finite Element Analysis
Published on: March 11, 2017
9.3K
相关概念视频
01:25Yield Criteria for Ductile Materials under Plane Stress
147
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...
147
01:18Mechanical Characteristics of Steel
393
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
393
01:21Fatigue
174
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
174
01:24Stress-Strain Diagram - Brittle Materials
2.2K
Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
2.2K
01:12Temperature Dependent Deformation
139
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
139
01:24Stress-Strain Diagram - Ductile Materials
619
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...
619