非线性梯度弹性薄板的中表面弹性模型

IF 5.7 1区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY International Journal of Engineering Science Pub Date : 2024-02-08 DOI:10.1016/j.ijengsci.2024.104026
C. Rodriguez
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引用次数: 0

摘要

本文为厚度为 h 的三维、均质、各向同性、非线性梯度弹性薄板的二维中表面推导了一个动态表面弹性模型。该模型由五种可以测量的薄板物理特性参数化,在奇异极限情况下,存储的表面能可还原为 Koiter 板能。该模型纠正了薄板中波传播的一个理论问题,并与作者关于拥有梯度弹性材料边界面的绿色弹性体理论相结合,消除了传统/经典模型中断裂的奇异性。我们的方法有别于以往对薄壳和薄板的研究,后者主要集中于从经典三维格林弹性中推导出材料表面的弹性理论。这项研究首次在母体非线性梯度弹性理论的基础上严格开发了表面弹性模型。
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A midsurface elasticity model for a thin, nonlinear, gradient elastic plate

In this paper, we derive a dynamic surface elasticity model for the two-dimensional midsurface of a thin, three-dimensional, homogeneous, isotropic, nonlinear gradient elastic plate of thickness h. The resulting model is parameterized by five, conceivably measurable, physical properties of the plate, and the stored surface energy reduces to Koiter’s plate energy in a singular limiting case. The model corrects a theoretical issue found in wave propagation in thin sheets and, when combined with the author’s theory of Green elastic bodies possessing gradient elastic material boundary surfaces, removes the singularities present in fracture within traditional/classical models. Our approach diverges from previous research on thin shells and plates, which primarily concentrated on deriving elasticity theories for material surfaces from classical three-dimensional Green elasticity. This work is the first in rigorously developing a surface elasticity model based on a parent nonlinear gradient elasticity theory.

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来源期刊
International Journal of Engineering Science
International Journal of Engineering Science 工程技术-工程:综合
CiteScore
11.80
自引率
16.70%
发文量
86
审稿时长
45 days
期刊介绍: The International Journal of Engineering Science is not limited to a specific aspect of science and engineering but is instead devoted to a wide range of subfields in the engineering sciences. While it encourages a broad spectrum of contribution in the engineering sciences, its core interest lies in issues concerning material modeling and response. Articles of interdisciplinary nature are particularly welcome. The primary goal of the new editors is to maintain high quality of publications. There will be a commitment to expediting the time taken for the publication of the papers. The articles that are sent for reviews will have names of the authors deleted with a view towards enhancing the objectivity and fairness of the review process. Articles that are devoted to the purely mathematical aspects without a discussion of the physical implications of the results or the consideration of specific examples are discouraged. Articles concerning material science should not be limited merely to a description and recording of observations but should contain theoretical or quantitative discussion of the results.
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