复合层结构疲劳分层损伤的审查和评估
Jinghui Deng1, Jie Zhou2, Tangzhen Wu1
1China Helicopter Research and Development Institute, Jingdezhen 333001, China.
Materials (Basel, Switzerland)
|December 23, 2023
概括
在复合材料中,疲劳分层损伤具有挑战性. 这篇评论对模型进行了分类,并建议使用XFEM和AI等先进的方法来更好地预测复杂结构.
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:
- 疲劳分层是分层复合材料的关键故障模式.
- 对于疲劳分层的现有理论框架,模型和数值模拟面临挑战.
- 需要对疲劳脱层方法和模型进行系统的分类.
研究的目的:
- 审查疲劳分层开始和传播的实验现象.
- 为了分类和分析有限元模型的疲劳分层损伤.
- 讨论四个理论框架:强度,断裂力学,损伤力学和混合模型.
主要方法:
- 对实验现象和现象学模型的审查.
- 对于疲劳分层损伤模型 (FDDM) 的有限元模型 (FEM) 的分类和分析.
- 详细讨论四个理论框架:强度理论模型 (SM),断裂力学模型 (FM),损伤力学模型 (DM) 和混合模型 (HM).
主要成果:
- 混合骨折和损伤力学模型,使用修改的巴黎法律,目前是最有效的FDDM.
- 传统的FDDM在复杂结构中与空间分层作斗争.
- 平衡模型采购成本和计算效率至关重要.
结论:
- 像扩展的有限元素方法 (XFEM),同位几何分析 (IGA),相场模型 (PFM),人工智能和更高阶变形理论 (HODT) 等先进的方法显示出有前途.
- 这些未来的研究方向可以克服对复杂复合结构疲劳分层预测的挑战.
- 这些先进方法的验证对于实际应用至关重要.
更多相关视频
07:53Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates
Published on: April 27, 2019
8.3K
07:15A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli
Published on: December 11, 2014
13.8K
相关概念视频
Fatigue
185
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...
185
Fatigue Strength of Concrete
192
Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
192
Unsymmetric Loading of Thin-Walled Members
113
Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...
The concept of the shear center is crucial in countering the...
113
Design Consideration
188
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
The factor of safety is another key...
188
Yield Criteria for Ductile Materials under Plane Stress
164
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...
164
Lumber Defects
123
Lumber defects, which can affect both the appearance and structural integrity of wood, include a variety of growth and manufacturing flaws. Growth defects such as knots and knotholes occur where branches were once attached to the tree trunk, with knotholes forming when these knots fall out. Other natural defects include decay and insect damage, which compromise the wood's strength and durability.
Shakes are minor fractures that run along or across the wood's annual rings, while wane is...
Shakes are minor fractures that run along or across the wood's annual rings, while wane is...
123
