Explanation and Function:

Continuous fibers form the primary load-bearing framework of CFRT, providing high-strength paths under extreme loads. Unlike short-cut fibers or non-woven fabrics, continuous fibers can uniformly transmit stress along the main load direction, avoiding local overload and material failure.

Engineering Example:

In rail transit vehicle floors or aerospace cabin walls, longitudinal fibers bear weight, and transverse fibers resist bending or torsion, forming a multi-dimensional load-bearing network that maintains the overall structural stability under extreme impact or vibration conditions.

Explanation and Function:

In CFRT, thermoplastic resins not only fix fiber positions, but also absorb impact energy through plastic deformation to delay crack propagation. Compared with brittle thermosetting composites, thermoplastic resins give CFRT a "buffer zone" under extreme impact, reducing the risk of instantaneous structural fracture.

Application Value:

In high-speed train collision energy-absorbing bulkheads or new energy vehicle floors, thermoplastic resins absorb part of the energy, ensuring the integrity of key load-bearing parts and reducing the transmission of impact to passengers or equipment.

Explanation and Function:

The bonding force of the fiber-resin interface determines the fatigue life and impact toughness of the material under extreme loads. Poor interface bonding will lead to interlayer delamination or fiber slip, reducing overall strength.

Engineering Practice:

Through fiber surface modification, nano-reinforcement, or interface modifiers, the interface bonding force can be significantly improved, realizing uniform stress transmission and efficient energy absorption, which is particularly suitable for high-cycle fatigue working conditions.

Explanation and Function:

CFRT performance optimization can be carried out at three scales: micro-scale (fiber-resin-interface), meso-scale (layup thickness, layup direction), and macro-scale (overall structural shape), achieving systematic optimization under extreme working conditions.

Engineering Significance:

In high-speed vehicles or aerospace cabin walls, different parts bear significantly different loads. Through multi-scale optimization, fibers can be reinforced or layup directions adjusted in high-stress areas, while materials can be thinned in low-stress areas, achieving a balance between lightweight design and high performance.

Explanation and Function:

Under impact conditions, CFRT exhibits interlayer fiber pull-out, resin plastic deformation, and progressive crack propagation, which can absorb a large amount of energy.

Application Example:

In autonomous vehicle collision bulkheads or rail transit vehicle collision protection plates, by increasing the layup thickness of key parts, CFRT can effectively absorb energy under high-speed collision, protecting the structure and passenger safety.

Explanation and Function:

Under high-fatigue working conditions such as rail transit vehicles or aerospace wings, CFRT achieves extended fatigue life through continuous fiber load-bearing and thermoplastic toughness plastic dissipation.

Engineering Practice:

Through layup angle optimization and local reinforcement, CFRT can maintain structural integrity under millions of cyclic loads, far exceeding the service life of traditional steel or thermosetting composites.

Explanation and Function:

Thermoplastic resins can withstand high temperatures while maintaining toughness; fiber reinforcement ensures that strength does not decrease at high temperatures. Humid and hot environments will not significantly reduce the interface bonding force.

Engineering Application:

In aerospace cabin walls or rail transit vehicle operating environments in tropical regions, CFRT maintains strength and toughness, preventing material aging and interlayer delamination.

Explanation and Function:

CFRT exhibits progressive failure, including fiber pull-out, resin plastic flow, and interlayer crack propagation. Compared with instantaneous metal fracture or brittle thermosetting material fracture, progressive failure provides safety redundancy.

Engineering Case:

The floor of high-speed rail transit vehicles will not fracture instantaneously under collision or rollover conditions, but absorb energy layer by layer, enabling the structure to retain partial load-bearing capacity and providing a time window for passenger safety.

Explanation and Function:

The number of fiber layers can be increased or layup directions adjusted in key stress-bearing areas, and sensors, conductive circuits, and heat dissipation channels can be embedded at the same time to achieve functional integration.

Application Practice:

The local thickening of CFRT on the battery compartment wall of new energy vehicles, combined with the integration of temperature sensors and heat conduction channels, realizes high-strength load-bearing and intelligent thermal management.

Explanation and Function:

CFRT absorbs vibration energy through resin plastic energy consumption and layup design, reducing structural fatigue and enabling energy recovery.

Engineering Example:

The floor of urban rail transit vehicles absorbs vibration, improving ride comfort, and reducing the accumulation of structural fatigue, extending service life.

Explanation and Function:

CFRT thermoplastic laminates adopt continuous forming processes, achieving high-efficiency, low-defect-rate, and large-scale production.

Engineering Significance:

In rail transit vehicles and new energy vehicles, automated continuous forming ensures consistent performance of each laminate, reducing scrap rates and improving production efficiency.

Explanation and Function:

Integrated molding of multiple components reduces the number of connection points, decreases stress concentration, and enables the embedding of sensors or functional modules.

Application Example:

The integrated molding of the floor of autonomous vehicles integrates supports, sensors, and vibration damping layers, reducing the number of parts and improving production efficiency.

Explanation and Function:

Thermoplastic CFRT can be repaired by local heating, extending service life, and waste materials can be recycled and reprocessed.

Engineering Case:

Damaged floors of rail transit vehicles or new energy vehicles can restore performance through local heating repair, saving costs and conforming to the concept of green manufacturing.