Design optimization of composite plates: Part II - Structural optimization by plydrop tapering

被引:21
作者
Manne, PM [1 ]
Tsai, SW [1 ]
机构
[1] Stanford Univ, Dept Aeronaut & Astronaut, Stanford, CA 94305 USA
关键词
D O I
10.1177/002199839803200604
中图分类号
TB33 [复合材料];
学科分类号
摘要
A preliminary design tool was developed to optimize structures such as beams and plates, with optional cutouts, subject to multiple loadsets and any boundary conditions. SUNSPOT provides with simple, tapered and manufacturable layups. Sublaminates, made of multiple plies at various orientations, combining one or more materials, are repeated or dropped in different zones of the structure, yielding the plydrops taper while ensuring physical continuity of the fibers in all composite layers. The orientation and thickness of each ply group in this reference sublaminate as well as its number of repetitions in the zones across the structure, are optimized using the Nelder-Mead algorithm in conjunction with parametric SAMCEF Finite Element Analyses, all integrated within SUNSPOT. The optimization objective is minimum weight for first ply failure strength. Maximum displacement constraints and economical manufacturing can be enforced additionally. Therefore, extended Tsai-Wu strength failure criteria were derived; new stiffness control criteria and a manufacturing complexity index were developed [1,2].
引用
收藏
页码:572 / 598
页数:27
相关论文
共 20 条
[1]  
BOTTING A, 1992, C P, V1, P40
[2]   EFFECT OF STEP SPACING ON DELAMINATION OF TAPERED LAMINATES [J].
CUI, WC ;
WISNOM, MR ;
JONES, M .
COMPOSITES SCIENCE AND TECHNOLOGY, 1994, 52 (01) :39-46
[3]   EFFECT OF DROPPED PLIES ON THE STRENGTH OF GRAPHITE-EPOXY LAMINATES [J].
CURRY, JM ;
JOHNSON, ER ;
STARNES, JH .
AIAA JOURNAL, 1992, 30 (02) :449-456
[4]  
FINE AS, UNPUB J COMPOSITE MA
[5]  
GRENESTEDT JL, 1992, THESIS ROYAL I TECHN
[6]  
Hughes TJR., 1987, The Finite Element Method: Linear Static and Dynamic Finite Element Analysis
[7]  
KURLAND JA, 1994, THESIS STANFORD
[8]   Design optimization of composite plates: Part I - Design criteria for strength, stiffness, and manufacturing complexity of composite laminates [J].
Manne, PM ;
Tsai, SW .
JOURNAL OF COMPOSITE MATERIALS, 1998, 32 (06) :544-571
[9]  
Manne PM, 1996, THESIS STANFORD U ST
[10]  
MANNE PM, IN PRESS J MECH COMP