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Flexural properties and impact behaviour analysis of bamboo cellulosic fibers filled cement based composites
https://orcid.org/0000-0002-9711-0059
Highlights Bamboo cellulosic fibers increase remarkably fracture toughness of composites. Bamboo cellulosic fibers improve significantly impact resistance of composites. Impact resistance increases with the increase of fibers within certain content. There is a good correlation between impact energy and failure patterns. The values of the energy absorption can reflect the impact resistance of materials.
Abstract The flexural properties and impact resistance of the composites with bamboo cellulosic fiber (BF) weight fractions ranging from 4% to 16% was investigated using a universal testing machine and a full instrumented drop weight impact system, respectively. The effect of addition of BF on the flexural properties and impact resistance of the composites was estimated according to max flexural strength, fracture toughness, the contact force, failure pattern and absorbed energy. On the basis of the above results, the impact behaviour of the specimens with 12 wt% BF was examined from the point of view of the impact energy change, the deformation feedback and the absorbed energy. Additionally, impact damage morphology and extent were analyzed using the digital camera and an industrial microfocus computed tomography (CT) system. The results show that BF reinforced cement based composites have higher fracture toughness and impact energy absorbility, the fracture toughness and absorbed energy of the specimens with 4–16 wt% BF are higher by 2.7–45.9 times and 2–24 times than that of the control specimen, respectively. However, due to fibers agglomeration resulted from fibers addition beyond certain content, max flexural strength and impact resistant of the composites no further increase. Furthermore, the different impact energy leads to the different failure patterns and energy absorption modes: at low impact energy, the main energy absorption modes are the debonding between fiber and the matrix; with the increase of the impact energy, the main energy absorption modes are delamination and BF breakage.
Flexural properties and impact behaviour analysis of bamboo cellulosic fibers filled cement based composites
https://orcid.org/0000-0002-9711-0059
Highlights Bamboo cellulosic fibers increase remarkably fracture toughness of composites. Bamboo cellulosic fibers improve significantly impact resistance of composites. Impact resistance increases with the increase of fibers within certain content. There is a good correlation between impact energy and failure patterns. The values of the energy absorption can reflect the impact resistance of materials.
Abstract The flexural properties and impact resistance of the composites with bamboo cellulosic fiber (BF) weight fractions ranging from 4% to 16% was investigated using a universal testing machine and a full instrumented drop weight impact system, respectively. The effect of addition of BF on the flexural properties and impact resistance of the composites was estimated according to max flexural strength, fracture toughness, the contact force, failure pattern and absorbed energy. On the basis of the above results, the impact behaviour of the specimens with 12 wt% BF was examined from the point of view of the impact energy change, the deformation feedback and the absorbed energy. Additionally, impact damage morphology and extent were analyzed using the digital camera and an industrial microfocus computed tomography (CT) system. The results show that BF reinforced cement based composites have higher fracture toughness and impact energy absorbility, the fracture toughness and absorbed energy of the specimens with 4–16 wt% BF are higher by 2.7–45.9 times and 2–24 times than that of the control specimen, respectively. However, due to fibers agglomeration resulted from fibers addition beyond certain content, max flexural strength and impact resistant of the composites no further increase. Furthermore, the different impact energy leads to the different failure patterns and energy absorption modes: at low impact energy, the main energy absorption modes are the debonding between fiber and the matrix; with the increase of the impact energy, the main energy absorption modes are delamination and BF breakage.
Flexural properties and impact behaviour analysis of bamboo cellulosic fibers filled cement based composites
https://orcid.org/0000-0002-9711-0059
Highlights Bamboo cellulosic fibers increase remarkably fracture toughness of composites. Bamboo cellulosic fibers improve significantly impact resistance of composites. Impact resistance increases with the increase of fibers within certain content. There is a good correlation between impact energy and failure patterns. The values of the energy absorption can reflect the impact resistance of materials.
Abstract The flexural properties and impact resistance of the composites with bamboo cellulosic fiber (BF) weight fractions ranging from 4% to 16% was investigated using a universal testing machine and a full instrumented drop weight impact system, respectively. The effect of addition of BF on the flexural properties and impact resistance of the composites was estimated according to max flexural strength, fracture toughness, the contact force, failure pattern and absorbed energy. On the basis of the above results, the impact behaviour of the specimens with 12 wt% BF was examined from the point of view of the impact energy change, the deformation feedback and the absorbed energy. Additionally, impact damage morphology and extent were analyzed using the digital camera and an industrial microfocus computed tomography (CT) system. The results show that BF reinforced cement based composites have higher fracture toughness and impact energy absorbility, the fracture toughness and absorbed energy of the specimens with 4–16 wt% BF are higher by 2.7–45.9 times and 2–24 times than that of the control specimen, respectively. However, due to fibers agglomeration resulted from fibers addition beyond certain content, max flexural strength and impact resistant of the composites no further increase. Furthermore, the different impact energy leads to the different failure patterns and energy absorption modes: at low impact energy, the main energy absorption modes are the debonding between fiber and the matrix; with the increase of the impact energy, the main energy absorption modes are delamination and BF breakage.
Flexural properties and impact behaviour analysis of bamboo cellulosic fibers filled cement based composites
Xie, Xiaoli (author) / Zhou, Zuowan (author) / Yan, Yun (author)
Construction and Building Materials ; 220 ; 403-414
2019-06-03
12 pages
Article (Journal)
Electronic Resource
English
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