复合材料叠层面板蜂窝夹芯的变厚平面结构有限元分析

一、引言与基本关系式 1950年前后所建三个经典夹层板理论,自然均可被推广到面板为复合材料叠层板中,本文基于推广的Hoff理论,其基本假设为: （1）上、下面板为叠层板,且叠层板厚度很薄,但不同铺向角各铺层的偏轴刚度差别较大,所以考虑面板本身的抗弯刚度;

FINITE ELEMENT ANALYSIS OF COMBINED SANDWICH PLANK AIRCRAFT STRUCTURE OF ADVANCED COMPOSITE MATERIAL USING MICROCOMPUTERS

Along with the improvement of the aircraft control surface of the modified type x-x, a general program for isoparametric element analysis is carried out for the surfaces,which are constructed with sandwich structures of Nomex honeycomb core and carbon fiber plank, solid carbon fiber beam, and front cored part. The principle and theoretical basis of the computation are analyzed, and a computational model as will as its programing is also recommended.The program is implemented on the IBM-PC microcomputer or thier compatible computers, thus the expenses of computation can be saved greatly. It can also be applied to wings, floors, hatches etc. Cdmparision of the calculated with existing experimental results for x trimmer shows that the calculated strain, stress and displacement distributions are reasonable and are satisfactory for aviation engineering applications.