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论文类型：期刊论文

发表时间：2020-01-01

发表刊物：COMPUTATIONAL MECHANICS

收录刊物：EI、SCIE

卷号：65

期号：1

页面范围：119-134

ISSN号：0178-7675

关键字：Pneumatic membranes; Wrinkling model; The co-rotational FEM; Complementarity

摘要：The paper proposes a complementarity computational framework for the wrinkling analysis of pneumatic membranes under follower loads. Geometric and material nonlinearities are separated by using the co-rotational finite element method. A reasonable wrinkling model is proposed based on the constitutive law of bi-modulus materials in the principal stress space. To improve the convergence, a linear complementarity framework is constructed in the local frame and embedded into the global Newton-Raphson iteration. The proposed method requires no extra solution techniques to ensure convergence, compared with other solution strategies, such as a pseudo-dynamic method and a penalty stabilization method. Three benchmark tests are employed to verify the proposed model and method. The numerical results have a good agreement with the existing numerical and experimental data. Importantly, the proposed computational method can even make a more accurate prediction on the displacement response and wrinkling regions than the post-buckling analysis of thin shells in some situation.