Postbuckling Response of Piece-Wise Uniform Tailored Composite Plates in Compression

Author:

Biggers Sherrill B.1,Srinivasan Sundar1

Affiliation:

1. Department of Mechanical Engineering Clemson University Clemson, SC 29634-0921

Abstract

Tailoring, or precisely specifying, the types, amounts, orientations and locations of composite materials in a structure to satisfy specific performance require ments is inherent to the design of efficient composite structures. A simple piece-wise uni form stiffness tailoring concept has previously been shown to increase compressive buck ling loads of plates by as much as 138 % to 195% , depending on the baseline uniform laminate. The question arises as to what benefits, it any, exist for plates tailored in this way when loaded in the postbuckling regime. This paper presents predictions for global measures of the postbuckling response of plates loaded in compression which have been tailored to maximize the initial buckling load. The analysis shows that postbuckling loads at failure can be increased by 130% to 150% by tailoring. The edge strain at first-ply fail ure is not significantly affected by tailoring. Postbuckling membrane secant and tangent stiffnesses are much higher for tailored plates than for uniform plates. Out-of-plane postbuckling deflections are shown to be much smaller at a given load level when tailoring is employed. The initial buckling mode shape and the manner in which postbuckling mode changes take place are strongly affected by tailoring. Thus, with this design approach, op timization for initial buckling can provide concurrent benefits in postbuckling response. This improved performance suggests that the skin plate of stiffened composite panels could be tailored using the current approach to significantly improve the postbuckling perform ance of stiffened panels.

Publisher

SAGE Publications

Subject

Materials Chemistry,Polymers and Plastics,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites

Cited by 18 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3