亚麻-玻璃混合复合材料在汽车组件中的应用对低速度减重的影响:数值建模和实验分析
Tegginamath Akshat1, Michal Petru1, Rajesh Kumar Mishra2
1Department of Machine Parts and Mechanism, Faculty of Mechanical Engineering, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec, Czech Republic.
Materials (Basel, Switzerland)
|October 29, 2025
概括
使用玻璃和亚麻纤维的混合聚合物复合材料在低速冲击下表现良好. 添加扩展聚乙烯 (EPS) 泡显著改善了这些先进材料的抗冲击性和损伤评估.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 混合聚合物复合材料越来越多地用于航空航天,汽车和海洋工业.
- 了解低速度撞击的影响对于结构完整性和安全至关重要.
- 冲击损伤评估对于预测复合材料组件的使用寿命至关重要.
研究的目的:
- 为了研究混合聚合物复合材料在低速度下降重量冲击下的行为.
- 将实验结果与有限元模拟进行比较.
- 评估扩展聚钢 (EPS) 泡在提高冲击性能方面的有效性.
主要方法:
- 对混合复合材料 (玻璃纤维和亚麻织物) 进行了实验性冲击测试,使用符合ASTM标准的滴量冲击测试机.
- 使用显式有限元软件LS-DYNA进行模拟,以复制实验条件.
- 测试和比较了带有和没有EPS泡层的复合板材.
主要成果:
- 实验和模拟结果显示变形 (3.32%-8.93%) 和最大冲击力 (0.06%-17.14%) 的变化,可能是由于材料缺陷.
- 与没有泡的复合板材相比,包含一层EPS泡的复合板材表现出更好的冲击性能.
结论:
- 该研究验证了混合复合材料在易受冲击的应用中的使用.
- 有限元分析提供了一种可靠的方法,用于预测冲击下的复合材料的行为,并指出了轻微的差异.
- 集成EPS泡是一种可行的策略,可以提高混合聚合物复合材料的抗冲击性和耐损伤性.
相关概念视频
Fatigue
792
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...
792
Composite Bodies
1.4K
A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
Composite bodies have widespread applications in mechanical engineering, from automobiles to aircraft to rockets. For example, an automobile wheel comprises...
Composite bodies have widespread applications in mechanical engineering, from automobiles to aircraft to rockets. For example, an automobile wheel comprises...
1.4K
Design of Transmission Shafts - Stress Analysis
706
Designing a transmission shaft requires a thorough understanding of the stresses induced by bending moments and torques, especially in systems where power is transferred through gears. These forces create force-couple systems at the centers of the shaft's cross-sections, leading to both transverse and torsional loading. Although shearing stresses from transverse loads are typically smaller than those from torques and are often overlooked, the significant normal stresses from these loads...
706
Bending of Members Made of Several Materials
553
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 material's...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
553


