Micromechanical analysis of damage mechanisms under tension of 0°–90° thin-ply composite laminates

2020 ◽  
Vol 234 ◽  
pp. 111659 ◽  
Author(s):  
M. Naderi ◽  
N. Iyyer
Keyword(s):  
Composite Laminates ◽  
Damage Mechanisms ◽  
Micromechanical Analysis

A multidirectional damage model for fiber-reinforced plastic laminates under static load

2019 ◽  
Vol 54 (2) ◽  
pp. 153-166
Author(s):  
Wenxuan Qi ◽  
Weixing Yao ◽  
Haojie Shen
Keyword(s):  
Composite Laminates ◽  
Damage Mechanics ◽  
Damage Model ◽  
Continuum Damage Mechanics ◽  
Matrix Cracking ◽  
Fiber Reinforced ◽  
Damage Mechanisms ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Plastic Laminates

A multidirectional damage model based on continuum damage mechanics for fiber-reinforced composite laminates is proposed in this paper. The influence of three main damage mechanisms, including transverse matrix cracking, local delamination, and fiber breakage, on the multidirectional stiffness properties of composite laminates is analyzed by introducing macro phenomenological damage variables. Then the mechanical behavior of elementary ply in laminates is modeled based on these damage variables. Besides, relations between micro-level damage variables and macro-level damage variables are established. Damage evolution laws of the three damage mechanisms are proposed to predict the degradation of multidirectional stiffness and failure strength of composite laminates under quasi-static loading. The experiment of cross-ply glass fiber-reinforced plastic laminates is carried out, and the prediction results show good agreement with the experimental results.

scholarly journals Modelling Aeronautical Composite Laminates Behaviour under Impact Using a Saturation Damage and Delamination Continuous Material Model

2010 ◽  
Vol 452-453 ◽  
pp. 369-372 ◽  
Author(s):  
Muhammad Ilyas ◽  
Christine Espinosa ◽  
Frédéric Lachaud ◽  
Laurent Michel ◽  
Michel Salaün
Keyword(s):  
Composite Material ◽  
Composite Laminates ◽  
Material Model ◽  
Woven Composites ◽  
Strain Rates ◽  
Dynamic Characterization ◽  
Damage Mechanisms ◽  
Numerical Predictions ◽  
Local Shear ◽  
Continuous Material

We show that the behavior of T700/M21s and T800/M21s composite panels are affected by the influence of strain rates together with local shear and crush punch or global flexural strengths of the structure. A deterministic continuous composite material model has been developed as a LS-DYNA user defined material model for unidirectional composites on the basis of the Matzenmiller model widely used for woven composites. Initiation and evolution up to saturation and fracture are implemented for various and coupled damage mechanisms including delamination. Quasi-static and dynamic characterization tests laminates have been carried out on balanced angle ply [±θ] and used for calibration of numerical values. Impact induced damage from experiment’s measures and numerical predictions are compared for T800/M21S aeronautical samples impacted at 15J.

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