Strength Prediction in Open Hole Composite Laminates by Using Discrete Damage Modeling

被引:64
作者
Swindeman, Michael J. [1 ]
Iarve, Endel V. [1 ]
Brockman, Robert A. [1 ]
Mollenhauer, David H. [2 ]
Hallett, Stephen R. [3 ]
机构
[1] Univ Dayton, Res Inst, Dayton, OH 45469 USA
[2] USAF, Res Lab, Composites & Hybrids Branch, Wright Patterson AFB, OH 45433 USA
[3] Univ Bristol, Adv Composites Ctr Innovat & Sci, Bristol BS8 1TR, Avon, England
基金
美国国家航空航天局;
关键词
TRANSVERSE CRACKING; MATRIX-CRACKING; FAILURE; DELAMINATION; ELEMENT; MECHANISMS;
D O I
10.2514/1.J051773
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
The present paper addresses the issue of direct simulation of complex local failure patterns in laminated composites. A model capable of the discrete modeling of matrix cracking, delamination, and the interaction of these two damage modes is proposed. The analytical technique develops the regularized extended finite element method for the simulation of matrix crack initiation and propagation at initially unknown locations, as well as a cohesive interface model for delamination. The regularized extended finite element method preserves the Gaussian integration schema in each element regardless of the enrichment required to model cracking and is capable of representing the complex kinematics of crack networks in composite laminates. The technique uses independently measured standard ply-level mechanical properties of the unidirectional composite (stiffness, strength, fracture toughness). Failure simulations of composites containing open holes are presented. Although the process of crack initiation is impossible to capture precisely due to local material variations the proposed method exhibits excellent agreement with experimental data for matrix and delamination crack growth in quasi-isotropic open hole graphite-epoxy composites with thick plies, where the composite fails in the delamination failure mode.
引用
收藏
页码:936 / 945
页数:10
相关论文
共 36 条
[1]   Finite element interface models for the delamination analysis of laminated composites: Mechanical and computational issues [J].
Alfano, G ;
Crisfield, MA .
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, 2001, 50 (07) :1701-1736
[2]   Prediction of the stiffness degradation in cross-ply laminates due to transverse matrix-cracking: an energy method approach [J].
Anderssen, R ;
Gradin, PA ;
Gustafson, CG .
ADVANCED COMPOSITE MATERIALS, 1998, 7 (04) :325-346
[3]   A regularized XFEM model for the transition from continuous to discontinuous displacements [J].
Benvenuti, E. ;
Tralli, A. ;
Ventura, G. .
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, 2008, 74 (06) :911-944
[4]   Transverse cracking of cross-ply laminates .1. Analysis [J].
Berthelot, JM ;
Leblond, P ;
ElMahi, A ;
LeCorre, JF .
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 1996, 27 (10) :989-1001
[5]   Failure criteria for FRP laminates [J].
Dávila, CG ;
Camanho, PP ;
Rose, CA .
JOURNAL OF COMPOSITE MATERIALS, 2005, 39 (04) :323-345
[6]   An augmented cohesive zone element for arbitrary crack coalescence and bifurcation in heterogeneous materials [J].
Fang, X. J. ;
Yang, Q. D. ;
Cox, B. N. ;
Zhou, Z. Q. .
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, 2011, 88 (09) :841-861
[7]   High-fidelity simulations of multiple fracture processes in a laminated composite in tension [J].
Fang, X. J. ;
Zhou, Z. Q. ;
Cox, B. N. ;
Yang, Q. D. .
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 2011, 59 (07) :1355-1373
[8]   An experimental investigation into the tensile strength scaling of notched composites [J].
Green, B. G. ;
Wisnom, M. R. ;
Hallett, S. R. .
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2007, 38 (03) :867-878
[9]   An experimental and numerical investigation into the damage mechanisms in notched composites [J].
Hallett, S. R. ;
Green, B. G. ;
Jiang, W. G. ;
Wisnom, M. R. .
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2009, 40 (05) :613-624
[10]   A finite element method for the simulation of strong and weak discontinuities in solid mechanics [J].
Hansbo, A ;
Hansbo, P .
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 2004, 193 (33-35) :3523-3540