| 励争*,周洁,李冰,刘咏泉,苏先樾.轻质点阵夹芯板热屈曲的实验研究[J].实验力学,2018,33(2):167~174 |
| 轻质点阵夹芯板热屈曲的实验研究 |
| Experimental study of thermal buckling of lightweight lattice sandwich panel |
| 投稿时间：2017-03-28 修订日期：2017-05-15 |
| DOI：10.7520/1001-4888-17-078 |
| 中文关键词: 点阵夹芯板 热稳定性 屈曲模式 |
| 英文关键词:lattice sandwich panel thermal stability buckling pattern |
| 基金项目:国家自然科学基金(11672004， 11521202) |
|
| 摘要点击次数: 1186 |
| 全文下载次数: 511 |
| 中文摘要: |
| 轻质点阵结构在高温工作环境下易产生失稳破坏，因此，研究其在热载荷条件下的稳定性是极为重要的。本文采用有限元数值计算和实验方法研究了轻质点阵夹芯板在热载荷作用下的稳定性问题。通过与点阵夹芯板的单向压力失稳形式相比较发现：点阵夹芯板的单向压力失稳和热载荷作用失稳的形式并不完全一致；而且，面板厚度及其与夹芯杆件的粘接程度对点阵夹芯板的稳定性有着重要的影响。此外，本文针对将温度变化等效为热应力这一等效模型的适用性进行了讨论，发现等效均匀化理论只适用于面板较厚且产生整体失稳的情况。 |
| 英文摘要: |
| The lightweight lattice structure is prone to instability failure in high temperature environment, so it is a crucial issue to study its stability under thermal loading. In this paper, the thermal stability of lightweight lattice sandwich panel under thermal loading is studied by using finite element (FE) numerical calculation and experimental method. It is found by comparing with the unidirectional pressure instability form of the lattice sandwich panel, that its thermal load instability is not completely consistent with former. Moreover, the panel thickness and the bonding degree with sandwich bar have important influence on the stability of lattice sandwich panel. In addition, the applicability of equivalent model, in which, the temperature change is equivalent to thermal stress is discussed. It is found that the equivalent homogenization theory is only applicable to the case where the panel is thick and the overall instability occurs. |
| 查看全文 下载PDF阅读器 |
| 关闭 |
