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An investigation of the self-heating phenomenon in viscoelastic materials subjected to cyclic loadings accounting for prestress

机译：考虑预应力的循环载荷下粘弹性材料自热现象的研究

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摘要

It has been demonstrated by many authors that the internal damping mechanism of the viscoelastic materials offers many possibilities for practical engineering applications. However, in traditional procedures of analysis and design of viscoelastic dampers subjected to cyclic loadings, uniform, constant temperature is generally assumed and do not take into account the self-heating phenomenon. Moreover, for viscoelastic materials subjected to dynamic loadings superimposed on static preloads, such as engine mounts, these procedures can lead to poor designs or even severe failures since the energy dissipated within the volume of the material leads to temperature rises. In this paper, a hybrid numerical-experimental investigation of effects of the static preloads on the self-heating phenomenon in viscoelastic dampers subjected to harmonic loadings is reported. After presenting the theoretical foundations, the numerical and experimental results obtained in terms of the temperature evolutions at different points within the volume of the viscoelastic material for various static preloads are compared, and the main features of the methodology are discussed.
机译：许多作者已经证明，粘弹性材料的内部阻尼机制为实际工程应用提供了许多可能性。但是，在传统的分析和设计粘弹性阻尼器承受循环载荷的过程中，通常假定温度均匀，恒定，并且不考虑自热现象。而且，对于粘弹性材料承受的动态载荷叠加在静态预载荷上，例如发动机支架，由于耗散在材料体积内的能量会导致温度升高，因此这些程序可能导致设计不良甚至严重失灵。本文报道了混合预应力对粘弹性阻尼器自谐现象的自热现象影响的数值试验研究。在介绍了理论基础之后，比较了在各种静态预载荷下粘弹性材料体积内不同点温度变化的数值和实验结果，并讨论了该方法的主要特点。

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  • 来源
    《Mechanical systems and signal processing》 |2015年第6期|115-127|共13页
  • 作者

    A.M.G. de Lima; D.A. Rade; H.B. Lacerda; C.A. Araujo;

  • 作者单位

    Federal University of Uberlandia, School of Mechanical Engineering, Campus Santa Monica, P. O. Box 593, CEP 38400-902 Uberlandia, MG, Brazil;

    Federal University of Uberlandia, School of Mechanical Engineering, Campus Santa Monica, P. O. Box 593, CEP 38400-902 Uberlandia, MG, Brazil;

    Federal University of Uberlandia, School of Mechanical Engineering, Campus Santa Monica, P. O. Box 593, CEP 38400-902 Uberlandia, MG, Brazil;

    Federal University of Uberlandia, School of Mechanical Engineering, Campus Santa Monica, P. O. Box 593, CEP 38400-902 Uberlandia, MG, Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Viscoelastic materials; Thermoviscoelasticity; Self-heating; Static preloads;

    机译：粘弹性材料;热粘弹性;自热;静态预载;

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