Stress-constant continuous fiber composite structure prestress application device and method
By combining a temperature-controlled heating lifting platform, a clamp positioning assembly, and a load application assembly, the problem of prestressing devices in existing technologies being unable to maintain constant stress and adaptability is solved. This enables efficient and precise application of prestress in composite materials, improving the molding quality of composite materials and the versatility of the machine.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUJIAN UNIV OF TECH
- Filing Date
- 2026-05-12
- Publication Date
- 2026-07-17
AI Technical Summary
Existing prestressing devices mostly apply stress based on constant strain, which leads to stress relaxation in composite materials and makes it impossible to maintain constant stress. The fixture fixing layout is difficult to adapt to structures with different fiber layup types. The separation of heating and prestressing application results in low molding efficiency and poor accuracy. The high friction of the transmission mechanism affects the accuracy of prestressing, resulting in uneven prestressing of composite curved parts, inability to estimate internal stress after curing, low dimensional accuracy, and large dispersion of mechanical properties.
The device employs a combination of a temperature-controlled heating lifting platform, a clamp positioning assembly, a fiber stretching assembly, and a load application assembly. It applies loads by combining a heavy object with a weighing instrument to achieve constant stress application. The clamp positioning assembly uses a slide rail combined with a slider to adapt to different arc-shaped structures. The load application assembly and the fiber stretching assembly are detachably connected to adapt to different composite material structures. A displacement sensor monitors stress changes in real time.
It achieves constant application of prestress in composite materials, improves the applicability and accuracy of the device, adapts to different fiber layup types, enhances molding efficiency and precision, reduces stress distribution unevenness, and ensures high-quality production of composite materials.
Smart Images
Figure CN122401943A_ABST