In the past, the field of composite materials was basically a unified situation of structural composite materials. It has been gradually changed by functional composite materials, and functional composite materials are also developing in the direction of multifunctional composite materials, making materials not only a structure, but also With function or multiple comprehensive functions.
Smart composite materials are materials that can sense changes in the environment, draw conclusions through self-judgment, and execute corresponding instructions autonomously. It has the three elements of life intelligence: perception function (monitoring of stress, strain, pressure, temperature, injury), judgment and decision-making function (self-processing information, discerning the cause, drawing conclusions) and executive function (self-healing and self-healing of injuries) Change the stress and strain distribution, structural damping, natural frequency and other structural characteristics), which integrates sensing, control and driving functions, can sense and respond to changes in the external environment in a timely manner, make judgments, issue instructions, and execute and complete actions to make the material possess Self-detection, self-diagnosis, self-monitoring, self-healing and self-adaptive capabilities are important developments in composite material technology, and their development will comprehensively improve the design and application of composite materials.
Smart composite materials usually integrate sensor materials and actuation materials into composite materials such as prepreg, wet sheet, fiber placement, fiber winding, and resin transfer molding (RTM) during the molding process. At the same time, through the controller integrated with it, the composite material can be self-diagnosed, self-adapted, and self-healed while bearing the mechanical load, so as to realize the intelligentization of the composite material.
The structure monitoring technology can measure the strain, temperature, and cracks inside the composite material component in real time, and detect its fatigue and damage, so as to realize the monitoring of the structure and the prediction of the life. For example: monitoring the structural damage that may occur during the manufacturing, processing, transportation, and storage of the composite material structure, and timely detection of possible matrix and fiber fracture, delamination, debonding of the inner lining layer and the composite material layer, and impact Damage etc.
At present, some advanced countries use optical fiber smart materials and structures to perform state monitoring and damage estimation of composite materials, that is, to embed optical fiber sensors or arrays in key parts of materials or structures for real-time monitoring, damage assessment and life prediction throughout the life cycle.
Hebei Yuniu Fiberglass Manufacturing Company Limited is a fiberglass material manufacturer with over 10-year experience, 7- year exporting experience.
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Post time: Sep-15-2021