Abstract
The fracture theory of fiber-reinforced polymer (FRP) composites is complicated compared to that of homogeneous materials. Textile FRPs need to consider crimp, fiber off-axis and various weaving parameters in a two-dimensional scale, which makes research of failure and fracture difficult. The objective and main contribution of the present research lie in taking textile bamboo FRP as an example and using tools such as toughness, load and deflection curves analysis, energy analysis, and first-order derivative signals to establish the preliminary information needed for fracture theory. This is followed by observing the fracture characteristics of the material under bending. The identification of fracture modes, corresponding energy, and energy dissipation are all prerequisites for developing fracture models in the future. Differences in the direction of force, weaving method, and number of laminates will cause the amount and direction of fibers to vary, which makes the type and progression of fracture different. Combining signal analysis, fracture images and energy dissipation curves, there are different modes of fracture between various groups due to different energy storage forms and crack types, which ultimately lead to different energy dissipation behaviors.
Highlights
IntroductionFRP (fiber-reinforced polymer) composites have been widely used in many fields of life
fiber-reinforced polymer (FRP) composites have been widely used in many fields of life
The total energy is the sum of the area under the complete curve. These properties are affected by variable factors and have similar trends to most woven FRPs, including the amount of fiber in the load direction, the number of laminas, and the weaving method [17,18]
Summary
FRP (fiber-reinforced polymer) composites have been widely used in many fields of life. In addition to the high cost of these fibers, other factors such as difficulty in recycling, energy consumption, irreversible waste, consumption of large amounts of chemicals, and high biological toxicity have caused many environmental impacts. Production disadvantages such as high energy consumption, difficult processing, and even various eco-regulations have posed resistance to conventional fibers. Woven preforms can provide better mechanical properties, impact resistance, damping and damage characteristics than those without weaving [6]. Natural FRPs have become a popular research topic, especially in the fields of aerospace and engineering materials
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