Enhancing the PVA fiber-matrix interface properties in ultra high performance concrete: An experimental and molecular dynamics study

2021 ◽  
Vol 285 ◽  
pp. 122862
Author(s):  
Yang Zhou ◽  
Jiale Huang ◽  
Xiao Yang ◽  
Yujia Dong ◽  
Taotao Feng ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
High Performance ◽  
High Performance Concrete ◽  
Interface Properties ◽  
Matrix Interface ◽  
Ultra High Performance Concrete ◽  
Fiber Matrix Interface ◽  
Fiber Matrix ◽  
Pva Fiber

The temperature effect on the inter-laminar shear properties and failure mechanism of 3D orthogonal woven composites

2020 ◽  
Vol 90 (23-24) ◽  
pp. 2806-2817
Author(s):  
Juanzi Li ◽  
Wei Fan ◽  
Tao Liu ◽  
Linjia Yuan ◽  
Lili Xue ◽  
...  
Keyword(s):  
High Temperature ◽  
Failure Mechanism ◽  
Failure Modes ◽  
Woven Composites ◽  
Interface Properties ◽  
Matrix Interface ◽  
Fiber Matrix Interface ◽  
Fiber Matrix ◽  
3D Orthogonal Woven ◽  
Laminar Shear

Recent increases in the use of carbon fiber reinforced plastics, especially for high-temperature applications, has induced new challenges in evaluating their mechanical properties. The effects of temperature on the shear performance of 3-dimensional orthogonal and 2-dimensional plain woven composites were compared in this study through double-notch shear tests. A scanning electron microscope was employed to investigate the fiber/matrix interface properties to reveal the failure characteristics. The results showed that temperature had a visible impact on the inter-laminar shear strength (ILSS), deformation modes, and failure mechanism. The ILSS decreased as temperature increased, which was caused by the degradation of the matrix properties and fiber/matrix interface properties at high temperature. A finite element model was established to analyze the transient deformation process and the damage mechanism of the 3D orthogonal woven composite. This indicated that Z-binder yarns could improve the delamination resistance of 3D orthogonal woven composites, especially under high temperatures. The changes in failure modes of the 3D orthogonal woven composites was put down to thermal softening of the epoxy resin caused by high temperature and the undulation of the yarns.

Strength and Interfacial Properties of Ceramic Composites

1986 ◽  
Vol 78 ◽  
Author(s):  
D. B. Narshall
Keyword(s):  
Interfacial Properties ◽  
Ceramic Composites ◽  
Interface Properties ◽  
Matrix Interface ◽  
Direct Measurements ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

ABSTRACTResults of recent micromechanics analyses of the reinforcing influence of frictionally bonded fibers in ceramic composites are summnarized. Direct measurements of the fiber/matrix interface properties are also discussed.

scholarly journals Effect of Interface Properties on Tensile and Fatigue Behavior of 2D Woven SiC/SiC Fiber-Reinforced Ceramic-Matrix Composites

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Longbiao Li
Keyword(s):  
Fatigue Behavior ◽  
Ceramic Matrix Composites ◽  
Matrix Cracking ◽  
Interface Debonding ◽  
Interface Properties ◽  
Matrix Interface ◽  
Fiber Matrix Interface ◽  
Fiber Matrix ◽  
Stress Matrix ◽  
Cracking Stress

In this paper, the effect of the fiber/matrix interface properties on the tensile and fatigue behavior of 2D woven SiC/SiC ceramic-matrix composites (CMCs) is investigated. The relationships between the interface parameters of the fiber/matrix interface debonding energy and interface frictional shear stress in the interface debonding region and the composite tensile and fatigue damage parameters of first matrix cracking stress, matrix cracking density, and fatigue hysteresis-based damage parameters are established. The effects of the fiber/matrix interface properties on the first matrix cracking stress, matrix cracking evolution, first and complete interface debonding stress, fatigue hysteresis dissipated energy, hysteresis modulus, and hysteresis width are analyzed. The experimental first matrix cracking stress, matrix cracking evolution, and fatigue hysteresis loops of SiC/SiC composites are predicted using different interface properties.

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