Modeling of Delamination Initiation and Propagation in Composite Laminates Under Monotonie Tensile Loading Using the Progressive Damage Modeling Technique
Modeling of Delamination Initiation and Propagation in Composite Laminates Under Monotonie Tensile Loading Using the Progressive Damage Modeling Technique
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DOI：
10.1515/secm.2009.16.2.99
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发表时间：
2009
影响因子：
1.9
通讯作者：
P. Vachon;V. Brailovski;P. Terriault
中科院分区：
文献类型：
--
作者：
P. Vachon;V. Brailovski;P. Terriault
本文介绍了一个基于渐进损伤模型技术的三维数值模型的初步验证。类似的模型在最近的文献中也有报道，试图研究层间应力分布，静态失效载荷和层合板的疲劳寿命，以及在循环载荷下层合板的分层扩展。本模型的目的是预测单调复杂载荷下无应力集中层合板的分层起始和扩展。确认过程包括使用Ansys有限元（FE）软件对SOLID 46和SOLID 191单元的性能进行比较研究，以及对复合材料FE建模中使用对称条件进行研究。验证中涉及的主要问题是：a）模型捕获层合板自由边附近层间应力的能力，和B）渐进损伤定律在表示层合板在单调拉伸载荷下的分层扩展中的准确性。一个很好的相关性之间取得了数值结果和文献中的数据这两个问题。此外，使用对称条件的研究表明，在对称平面附近的层间应力分布的一些奇异性。因此，在进行实体造型时，应特别注意对称面附近区域的层间应力分布。
This paper introduces the preliminary validation of a 3-D numerical model based on the progressive damage modeling technique. Similar models have been reported in recent literature, attempting to study interlaminar stress distribution, static failure load and fatigue life of laminates, as well as delamination propagation in laminated plates under cyclic loading. The present model is intended to predict delamination initiation and propagation in laminates without stress raisers under monotonic complex loading. The validation process includes a comparative study on the performance of both SOLID46 and SOLID 191 elements using the Ansys Finite Element (FE) software, in addition to a study on the use of symmetry conditions in the FE modeling of composites. The main issues involved in the validation are: a) the ability of the model to capture interlaminar stresses near the free edge of the laminate, and b) the accuracy of progressive damage laws in representing delamination propagation in a laminate under monotonic tensile loading. A good correlation was achieved between numerical results and data in the literature for both issues. Also, the study on the use of symmetry conditions showed some singularities in interlaminar stress distribution, in the vicinity of the symmetry plane. Therefore, it was concluded that particular attention should be paid to the interlaminar stress distribution in the zone near the symmetry planes when using solid modeling.