Theoretical and experimental analysis of carbon epoxy asymmetric dcb specimens to characterize mixed mode fracture toughness

被引：40

作者：

Mollon, V. ^{[2
]}

Bonhomme, J. ^{[1
]}

Vina, J. ^{[2
]}

Arguelles, A. ^{[1
]}

机构：

[1] Univ Oviedo, Dept Construct & Mfg Engn, Gijon 33203, Spain

[2] Univ Oviedo, Dept Met Engn & Mat Sci, Gijon 33203, Spain

来源：

POLYMER TESTING | 2010年 / 29卷 / 06期

关键词：

Delamination; Fracture; Mixed mode; ADCB; ENERGY-RELEASE RATES; CRITERION; FAILURE;

D O I：

10.1016/j.polymertesting.2010.04.001

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The Asymmetric DCB test (ADCB) is an alternative configuration to the MMB test (Mixed Mode Bending) to produce a mixed mode load state at the crack tip. In this test, the crack plane is out of the laminate midplane. This test configuration is as simple as pure mode I tests. Nevertheless, the mixed mode load state at the crack tip cannot be controlled by means of the test fixtures and so G(I) and G(II) are not easily calculated. In this test configuration, the position of the crack plane controls the percentage of mode I and mode II load at the crack tip. In this paper, unidirectional carbon epoxy ADCB samples have been used to study the mixed mode load state at the crack tip from different points of view: experimental, numerical and analytical procedures. The MBT method has been adapted to allow the calculation of G in ADCB samples. Also, an empirical procedure has been proposed in order to calculate G(I) and G(II). (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：766 / 770

页数：5

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