相关实验视频
Updated: May 20, 2025
07:36
Experimental Procedure for Warm Spinning of Cast Aluminum Components
Published on: February 1, 2017
9.4K
材料流量控制和工艺设计在约束环滚动的薄壁形圆柱体与三个环肋
Duanyang Tian1,2, Xinghui Han1,2, Zhuwei Lu1,2
1Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China.
Materials (Basel, Switzerland)
|March 27, 2025
概括
一个新的双通制约环 (CRR) 工艺有效地防止了三环肋 (TWCCTRR) 的薄壁形圆柱体中不合理的材料流动. 这种方法提高了变形均性,并减少了高性能航空航天部件的形成力.
科学领域:
- 制造业 工程 制造工程
- 材料科学 材料科学 材料科学
- 航空航天工程 航空航天工程
背景情况:
- 带有三环肋的薄壁形圆柱体 (TWCCTRR) 是航空航天领域的重要承载部件.
- 高性能制造TWCCTRR面临挑战,特别是不合理的材料流 (UMF).
- 约束环滚动 (CRR) 是TWCCTRR的一个有前途的技术,但易受UMF的影响.
研究的目的:
- 在TWCCTRR的CRR中调查UMF的原因.
- 提出一个改进的CRR流程来缓解UMF.
- 评估提议过程在增强TWCCTRR制造方面的有效性.
主要方法:
- 使用有限元 (FE) 模拟来分析CRR期间的材料流.
- 模拟了一个单通式CRR流程来识别UMF的发生.
- 开发并模拟了一种新的双通式CRR流程,以解决UMF.
主要成果:
- FE模拟显示,由于中间肋骨的过早填充,单通式CRR中的UMF.
- 拟议的双通CRR过程确保同时填充所有三条肋骨,防止UMF.
- 与单通式的CRR相比,双通式CRR显示出改进的变形均性和最大辐射形成力的15%降低.
结论:
- 双通CRR过程在TWCCTRR制造过程中有效地消除UMF.
- 这种优化的流程提高了TWCCTRR的质量和性能.
- 这些发现为RCR在航空航天制造业的工业应用提供了理论指导.
相关概念视频
01:15Thin-Walled Hollow Shafts
159
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...
159
01:18Stress Concentrations in Circular Shafts
154
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...
154
01:10Deformation in a Circular Shaft
254
One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
254
01:09Bending of Material: Problem Solving
168
In this lesson, determine the ratio of the maximum bending moments applied to two metal pipes, given that both pipes can withstand a maximum stress of 100 MPa. Both pipes have an outer radius of 1.8 cm. Pipe A has an inner radius of 1.5 cm, and Pipe B has an inner radius of 1 cm. The ratio of the maximum bending moment applied to two metallic pipes, each with a different inner and outer radius, is determined by considering their dimensions. The inner radius of the first pipe is 1.5 cm, and for...
168
01:10Residual Stresses in Circular Shafts
149
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
149
01:20Plastic Deformation in Circular Shafts
175
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
175