报告题目：包含功能梯度材料核心和Pasternak基体的三明治结构力学行为（THE BEHAVIOR OF SANDWICH STRUCTURES CONTANING AN FGM CORE RESTING ON PASTERNAK FOUNDATION）
报告人：艾卡特.施纳克 教授（德国卡尔斯鲁厄理工学院）
报告时间：2017年7月3号（周一）10:00
报告地点：校本部HE207会议室
主办部门：37000cm威尼斯力学系
邀 请 人：张俊乾 教授
Abstract：
In this study, the stability of sandwich structures with the functionally graded material (FGM) core surrounded by Pasternak elastic foundation is investigated.
The main disadvantage of conventional sandwich structures is the presence of strong discontinuity stresses at the face sheet-core interface which may introduce serious delamination problems. Use FGM layers can lead to significant mitigating the intensity of interfacial stress, this increases the reliability and safety of the sandwich structures. FGMs are a relatively new class of advanced composites characterized by the gradual variation in composition, microstructure and material properties.
In this study the modeling of sandwich cylindrical shells with FGM core, modeling of the Pasternak elastic foundation, modeling of effective material properties, modeling of stresses and strains relations is presented first. Then the basic equations are derived by expressing the forces and moments with the deflection and stress function based on the classical shell theory (CST). The expression for the critical axial load for the sandwich cylindrical shell with an FGM core resting on the Pasternak elastic foundation is found. Finally, the influences of FGM core and elastic foundations on the critical axial load are investigated.
报告人介绍：
