摘要：This paper reports a new algorithm that provides analytic solution to the equilibrium equation in A-FEM. It utilizes a consistency check between trial cohesive stiffness and resulting displacements to differentiate crack displacements from nodal displacements. Benchmark numerical tests demonstrate that the algorithm yields superior numerical accuracy, efficiency, and robustness to other methods. The overall improvement in numerical efficiency is similar to 50 times that of the phantom-node based A-FEM in modeling a 4-point shear beam test. For mixed-mode composite delamination problems, the A-FEM with the algorithm is 20-30% faster than standard CZM despite that in the CZM delamination paths are predefined. (C) 2015 Elsevier Ltd. All rights reserved.

关键字：Fracture Augmented finite element method Cohesive zone models

ISSN号：0013-7944

卷、期、页：卷: 139 页: 78-97

发表日期：2015-05-01

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,ESI（基本科学指标数据库）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：ENGINEERING FRACTURE MECHANICS

参与作者：Schesser, D.,Yang, Q. D.,凌道盛

第一作者：刘伟

论文类型：期刊论文

论文概要：刘伟,Schesser, D.,Yang, Q. D.,凌道盛，A consistency-check based algorithm for element condensation in augmented finite element methods for fracture analysis，ENGINEERING FRACTURE MECHANICS，2015，卷: 139 页: 78-97

论文题目：A consistency-check based algorithm for element condensation in augmented finite element methods for fracture analysis