相关实验视频
Updated: Jul 27, 2025

07:18
Generating Lap Joints Via Friction Stir Spot Welding on DP780 Steel
Published on: August 13, 2019
7.0K
由于其不同配置而暴露于屈曲负荷的步行关节的损伤特征
Murat Demiral1, Ferhat Kadioglu2,3
1College of Engineering and Technology, American University of the Middle East, Egaila 54200, Kuwait.
Polymers
|June 10, 2023
概括
这项研究研究了在曲负载下进行阶梯膝关节的研究,发现三级配置提供了最佳的曲性能. 增加这些关节的重叠长度显著提高了能量吸收能力.
科学领域:
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
- 结构分析 结构分析
背景情况:
- 步行膝关节的设计是为了减轻单膝关节中常见的剥皮应力.
- 关节在服务过程中经常遇到曲负荷.
- 在现有的文献中,步行膝关节的曲性能仍然没有得到充分的研究.
研究的目的:
- 为了研究脚步膝关节的曲性能.
- 分析关节配置对曲负载能力和能量吸收的影响.
- 建立一个验证的数值模型,用于步行环节关节分析.
主要方法:
- 使用ABAQUS-标准开发3D高级有限元素 (FE) 模型.
- 对DP 460 (粘合剂) 和A2024-T3合金 (粘合剂) 的建模.
- 用于粘合层的凝聚区元素,并通过实验数据验证.
主要成果:
- 一个三阶段的膝关节配置展示了卓越的曲性能.
- 上层和下层阶段的重叠长度增加显著增加了能量吸收.
- FE模型与实验结果对准确性进行了验证.
结论:
- 三阶段的膝关节配置是最适合曲应用的.
- 设计修改,特别是增加重叠长度,可以增强阶梯膝关节的能量吸收.
- 经过验证的FE模型提供了一种可靠的工具,用于分析在曲负荷下脚步膝关节的行为.
相关概念视频
Flexural Stress
330
When analyzing bending in symmetric members, it's crucial to understand how stresses distribute when subjected to bending moments. This stress distribution is effectively described by applying fundamental mechanics and material science principles, particularly Hooke's Law for elastic materials.
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to...
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to...
330
Deformation of Member under Multiple Loadings
193
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
193
Eccentric Axial Loading in a Plane of Symmetry
236
Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
236
Stresses under Combined Loadings
179
When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
179
Bending of Members Made of Several Materials
231
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
231
Internal Loadings in Structural Members: Problem Solving
1.3K
When designing or analyzing a structural member, it is important to consider the internal loadings developed within the member. These internal loadings include normal force, shear force, and bending moment. Engineers can ensure that the structural member can support the applied external forces by calculating these internal loadings.
To illustrate this, let's consider a beam OC of 5 kN, inclined at an angle of 53.13° with the horizontal and supported at both ends. Determine the internal...
To illustrate this, let's consider a beam OC of 5 kN, inclined at an angle of 53.13° with the horizontal and supported at both ends. Determine the internal...
1.3K

