Flexural impact response of textile reinforced inorganic phosphate cement composites (TRC)

This work presents the characterisation of the local low velocity impact behaviour of a high-performance fibre reinforced cementitious composite (HPFRCC) made of phosphate cement and different types of E-glass textile reinforcements. The so called "energy profiling method" that was used for quantitative characterisation is adopted from Liu et al. (2004) who introduced this methodology on polymer matrix composites (PMC). A series of plates reinforced with chopped strand E-glass fibre mats (fibre volume fraction of 24%) was impacted during drop weight tests, showing that this methodology is as well applicable to textile reinforced cementitious composites. Further, the effects of impactor size and plate thickness were investigated experimentally, and finally the obtained results were compared to literature data for polymer matrix composites. (C) 2017 Elsevier Ltd. All rights reserved

Comparison of the crushing performance of hollow and foam-filled small-scale composite tubes with different geometrical shapes for use in sacrificial cladding structures

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Numerical energy absorption study of composite tubes for axial impact loadings

This paper focuses on the numerical energy absorption behaviour of pultruded composite tubes under an axial impact loading case. The circular and square cross sectional glass-polyester composite tubes are considered for the study. In order to capture the typical failure modes such as delaminations, lamina bending, axial cracks and fibre fracturing, a new innovative approach was used using multiple shell elements, cohesive elements and pre-defined seams. To predict the correct peak crush load and the corresponding energy absorption, the importance of the numerical modelling of multiple delaminations and triggering are discussed. Two types of triggering were chosen for the study (45⁰ deg chamfering around the edges and a tulip pattern with an included angle between the edges of 60⁰). Finally, the results of this numerical investigation are compared with experimental data. The commercially available finite element code ABAQUS V6.7-3 Explicit was used for this study

Applicability of composite Charpy impact method for strain hardening textile reinforced cementitious composites

Since most test methods, used for strain hardening cementitious composites, are adopted from polymer composites test standards, this paper investigates the applicability of a standard impact test (ISO 179-1:2000), which is used in the polymer composites world, on a specific textile reinforced cementitious composite using an inorganic phosphate cement (IPC) as a matrix material. The aim is to provide a test method to investigate the local impact behaviour of textile reinforced cementitious composites. It was found within this work that this method is applicable to cementitious composites provided some adaptations to the specimens' dimensions. The Charpy impact strength of an IPC matrix reinforced with different kinds of fibre types is successfully investigated. This test method can be used to qualitatively rank different cementitious composite materials