Modeling of contact interface between two material layers in hybrid structures

  • Nguyen Thi Thu Nga

    Le Quy Don Technical University, No. 236 Hoang Quoc Viet Street, Hanoi, Vietnam
  • Tran Nam Hung

    Le Quy Don Technical University, No. 236 Hoang Quoc Viet Street, Hanoi, Vietnam
Email: nguyennga@lqdtu.edu.vn
Từ khóa: Hybrid structures, interface stiffnesses, homogenization, asymptotic algorithm

Tóm tắt

In hybrid structures, material layers of different mechanical properties are integrated to increase bearing capacity. When the difference in mechanical properties or thickness of the material layers is very large, debonding usually occurs along the interface between the two layers. This study uses a homogenization procedure combined with asymptotic algorithm applied on weaker/thinner materials to determine the interface stiffnesses for such structures. All the material layers and the interface are assumed to be linear elastic. Comprising with the available methods and numerical simulation results showed that the proposed model is more suitable with the work of the structures in reality. Furthermore, in this method the interface stiffnesses can be easily determined through the number and length of cracks and the dry or saturated state of the medium are also considered.

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