Meso-Scale Damage Simulation of 3D Braided Composites under Quasi-Static Axial Tension
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Meso-Scale Damage Simulation of 3D Braided Composites under Quasi-Static Axial Tension Chao Zhang 1 & Chunjian Mao 2 & Yexin Zhou 3
Received: 28 September 2016 / Accepted: 3 October 2016 # Springer Science+Business Media Dordrecht 2017
Abstract The microstructure of 3D braided composites is composed of three phases: braiding yarn, matrix and interface. In this paper, a representative unit-cell (RUC) model including these three phases is established. Coupling with the periodical boundary condition, the damage behavior of 3D braided composites under quasi-static axial tension is simulated by using finite element method based on this RUC model. An anisotropic damage model based on Murakami damage theory is proposed to predict the damage evolution of yarns and matrix; a damagefriction combination interface constitutive model is adopted to predict the interface debonding behavior. A user material subroutine (VUMAT) involving these damage models is developed and implemented in the finite element software ABAQUS/Explicit. The whole process of damage evolution of 3D braided composites under quasi-static axial tension with typical braiding angles is simulated, and the damage mechanisms are revealed in detail in the simulation process. The tensile strength properties of the braided composites are predicted from the calculated stress-strain curves. Numerical results agree with the available experiment data and thus validates the proposed damage analysis model. The effects of certain material parameters on the predicted stress-strain responses are also discussed by numerical parameter study.
* Chao Zhang [email protected] * Chunjian Mao [email protected] Yexin Zhou [email protected]
1
School of Mechanical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013, China
2
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, China
3
Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, China
Appl Compos Mater
Keywords 3D braided composites . Representative unit-cell . Damage modeling . Strength prediction . Finite element analysis
1 Introduction Laminated composites are being widely used in many industries because of their high performance-weight ratio. However, poor out-of-plane properties, low damage tolerance and high production costs have limited their application in primary loading-bearing structures. In the past two decades, 3D braided composites have received much attention due to their abundant advantages over the laminated composites. The distinct feature of 3D braided composites is the integrated near-net-shape structures, which can provide outstanding through-thickness mechanical properties. Due to these merits, 3D braided composites are believed to have broad potential application as the primary loading-bearing structures in the aeronautics and astronautics industries. Before the application of 3D braided composites, a rational characterization of their m
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