An elastoplastic mechanical-thermal model for temperature rise simulation of two-dimensional triaxially braided composites under quasi-static loads

Article Nanoscience & Nanotechnology

Understanding the critical role of boundary conditions in meso-scale finite element simulation of braided composites

Zhenqiang Zhao et al.

Summary: Reasonable boundary conditions can improve calculation efficiency, while symmetric boundary conditions may cause undesired strain concentration and premature damage.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

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Article Materials Science, Composites

Visualization and interpretation of the impact failure behavior of textile composites using a highly efficient Meso-FE model

Peng Liu et al.

Summary: A highly efficient mesoscale finite element model was developed to predict the damage and failure of a triaxially braided composite panel under impact loading. By integrating proper meshing verification and parameter correlation, the model significantly reduced computational time while accurately capturing the impact damage distribution and main failure behavior of the composite panel.

COMPOSITES COMMUNICATIONS (2022)

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Article Materials Science, Composites

Size-dependency of the transverse-tensile failure behavior for triaxially braided composites

Yinglong Cai et al.

Summary: The study investigates the size-dependent failure behavior of single-layer triaxially braided composites under transverse tension load. Experimental and numerical results show a transition in the failure mechanism from fiber bundle pull-out dominated to fiber bundle shear dominated as specimen width increases. Numerical simulation results reveal the correlation of free-edge effect with progressive failure behavior.

COMPOSITES SCIENCE AND TECHNOLOGY (2021)

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Article Mechanics

Effect of fiber architecture on the impact resistance of composite panels subjected to metallic projectile

Zhenqiang Zhao et al.

Summary: Experiments using a single-stage gas gun evaluated the resistance of three types of composite panels to high-velocity impacts, examined critical penetration velocity, deformation, and failure morphologies using various technologies, and introduced a normalized quantity to assess energy absorption capacity. The results provide insights into impact failure behavior of composite panels and can be helpful in material selection for aeroengine casings.

COMPOSITE STRUCTURES (2021)

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Article Engineering, Mechanical

Effects of loading rate and loading direction on the compressive failure behavior of a 2D triaxially braided composite

Zhenqiang Zhao et al.

Summary: The study investigated the effects of loading rate and loading direction on the compression failure behavior of a typical 0 degrees/+/- 60 degrees 2DTBC. It was found that both axial and transverse compression strength significantly increased under dynamic loading conditions, with different failure mechanisms observed for the two loading directions. Additionally, the influence of loading rate on the compressive failure behavior of the 2DTBC was systematically examined.

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING (2021)

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Article Engineering, Mechanical

Theoretical prediction for effective properties and progressive failure of textile composites: a generalized multi-scale approach

Haoyuan Dang et al.

Summary: The developed analytical model can predict the progressive failure behavior of various types of textile composites by reconstructing the unit cell into a refined lamina structure and establishing two-way coupled stress-strain responses. The model's efficiency and versatility are demonstrated through validation results, allowing for the study of the effects of global fiber volume fraction, braided angle, and selected failure criteria on mechanical properties.

ACTA MECHANICA SINICA (2021)

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Article Engineering, Multidisciplinary

Microstructure modeling multiple transverse impact damages of 3-D braided composite based on thermo-mechanical coupling approach

Meiqi Hu et al.

Summary: A microstructure model based on fully thermo-mechanical coupling behavior of 3-D braided composites has been proposed for characterizing multiple transverse impact damage. The model incorporates interfacial contact and cohesive debonding, as well as ductile and shear damage, along with thermo-mechanical coupling constitutive equations. Adiabatic temperature rise and interfacial damage are concentrated on the impact surface with local plastic deformation, caused by the heat energy generated in impact interaction leading to thermal expansion of epoxy resin and extra internal stress. Comparisons between braided preforms with and without axial yarns show that axial yarns improve heat energy absorption and impact damage tolerances, while impeding impact damage growth.

COMPOSITES PART B-ENGINEERING (2021)

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Review Construction & Building Technology

A review on the tensile behavior of fiber-reinforced polymer composites under varying strain rates and temperatures

Azzam Ahmed et al.

Summary: This study comprehensively reviews the tensile performance of FRP composites under different strain rates and temperatures, and finds that the tensile strength depends on strain rates, temperatures, and coupling effects, with different failure patterns at various strain rates and temperatures.

CONSTRUCTION AND BUILDING MATERIALS (2021)

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Article Materials Science, Composites