通过考虑界面处的全应力和位移兼容性,改进具有双线性弹塑性核心的夹层梁的高阶弯曲分析

IF 2.3 3区 工程技术 Q2 MECHANICS
Sattar Jedari Salami
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引用次数: 0

摘要

通过考虑双线性弹塑性核心,首次研究了界面处的全应力/位移相容性条件。论文使用了改进的高阶夹芯板理论(IHSAPT)的概念,并根据几何和材料非线性的独特机制对该方法进行了扩展,以考虑弯曲响应。模型的分析结果与实验结果进行了比较。重点放在满足界面处的剪应力相容性条件以及夹芯塑性模量的影响上,从而为夹芯板的弯曲响应提供了一个独特的视角。就荷载-位移(包括柔性夹芯的局部效应)而言,本方法的结果与实验结果十分吻合。研究还表明,本模型可以识别并量化界面处剪应力连续性的局部效应,而文献中的传统高阶夹芯板模型则无法做到这一点。研究结果有助于了解夹芯的剪切和法向塑性模块对顶部和底部界面的横向法向和剪切应力分布、贯穿夹芯厚度的应力和位移分量、力和力矩结果、面片的横向位移的影响,这些结果可作为未来研究的基准结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Improved high-order bending analysis of sandwich beams with bilinear elasto-plastic core by considering full stress and displacement compatibility at interfaces

Improved high-order bending analysis of sandwich beams with bilinear elasto-plastic core by considering full stress and displacement compatibility at interfaces

Improved high-order bending analysis of sandwich beams with bilinear elasto-plastic core by considering full stress and displacement compatibility at interfaces

Full stress/displacement compatibility conditions at interfaces by considering the bilinear elasto-plastic core are investigated for the first time. The paper uses the concepts of the improved high-order sandwich panel theory (IHSAPT) and generalizes the approach to account for the bending response based on the unique mechanism of geometrical and material nonlinearity. The analytical results of the model are presented and compared with the experimental results. Emphasis is placed on satisfying shear stress compatibility conditions at the interface along with the effects of the plastic modulus of the core to provide a unique perspective on the bending response of sandwich panels. The results of the present approach are in good agreement with experimental results in terms of load–displacement, including the localized effects attributed to the flexible core. It is also shown that the present model can identify and quantify the localized effects of shear stress continuity at interfaces while conventional high-order sandwich panel models available in the literature fail to do so. The results of the study contribute to the effects of shear and normal plastic modules of the core on transverse normal and shear stress distributions at top and bottom interfaces, stress and displacement components through the thickness of the core as well as the force and moment resultants, and transverse displacements in the face sheets, which may be used as benchmark results for future studies.

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来源期刊
Acta Mechanica
Acta Mechanica 物理-力学
CiteScore
4.30
自引率
14.80%
发文量
292
审稿时长
6.9 months
期刊介绍: Since 1965, the international journal Acta Mechanica has been among the leading journals in the field of theoretical and applied mechanics. In addition to the classical fields such as elasticity, plasticity, vibrations, rigid body dynamics, hydrodynamics, and gasdynamics, it also gives special attention to recently developed areas such as non-Newtonian fluid dynamics, micro/nano mechanics, smart materials and structures, and issues at the interface of mechanics and materials. The journal further publishes papers in such related fields as rheology, thermodynamics, and electromagnetic interactions with fluids and solids. In addition, articles in applied mathematics dealing with significant mechanics problems are also welcome.
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