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Parametric modeling of bolted joints between components made of particulate composite materials.

机译:由颗粒复合材料制成的组件之间的螺栓连接的参数化建模。

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摘要

Particulate metal matrix composites (MMC) exhibit higher stiffness, strength and wear resistance compared to metal alloys. They exhibit superior compressive and buckling strength because of their higher plastic modulus. MMC's can operate at very higher temperatures than fiber-reinforced polymer composites. Their isotropic behavior and forming ability by conventional methods makes them a better choice for low-cost applications. They have good thermal conductivity, high electrical conductivity and low thermal expansion.; The main objective of this study is to predict numerically the stress distributions around the hole in a bolted joint made of particulate metal matrix composite and to investigate the associated load transfer efficiencies both for a single and double lap bolted joints. A three dimensional Finite Element parametric model has been developed to study the effects of various design parameters on the structural performance of such joints.; Single lap bolted joints experience bending when tension load is applied to the joint because of the unsymmetrical configuration of the joint. This effect is reduced in double lap bolted joints due to their symmetry. This research quantifies the relationship between the stress around the hole in bolted joints and the washer diameter, bolt diameter, tightening pressure, and the clearance between the hole and the bolt. It has also been observed that variations in Young's Modulus have no insignificant effect on the stress concentration around the hole.
机译:与金属合金相比,颗粒金属基复合材料(MMC)具有更高的刚度,强度和耐磨性。它们具有较高的塑性模量,因此具有出色的压缩和屈曲强度。 MMC的温度可以比纤维增强的聚合物复合材料高得多。传统方法的各向同性行为和成形能力使它们成为低成本应用的更好选择。它们具有良好的导热性,高导电性和低热膨胀性。这项研究的主要目的是通过数值预测由颗粒状金属基复合材料制成的螺栓接头中孔周围的应力分布,并研究单圈和双圈螺栓接头的相关载荷传递效率。已经开发了三维有限元参数模型来研究各种设计参数对这种接头的结构性能的影响。由于接头的非对称结构,当对接头施加拉力载荷时,单圈螺栓连接的接头会发生弯曲。由于双搭接螺栓的对称性,这种效果会降低。这项研究量化了螺栓接头中孔周围的应力与垫圈直径,螺栓直径,紧固压力以及孔与螺栓之间的间隙之间的关系。还已经观察到,杨氏模量的变化对孔周围的应力集中没有显着影响。

著录项

  • 作者

    Goteti, Vasudha.;

  • 作者单位

    West Virginia University.;

  • 授予单位 West Virginia University.;
  • 学科 Engineering Mechanical.; Engineering Materials Science.
  • 学位 M.S.M.E.
  • 年度 2003
  • 页码 91 p.
  • 总页数 91
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;工程材料学;
  • 关键词

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