A preparation method of a composite energy-absorbing box and a protective beam assembly
By fabricating composite material energy-absorbing boxes and protective beam assemblies, and utilizing the radial constraints of the load-bearing frame and structural skin, the problems of heavy weight and high maintenance costs of metal energy-absorbing boxes were solved, achieving lightweight and efficient energy management.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA MASCH PRECISION FORMING IND TECH RES INST (ANHUI) CO LTD
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-17
AI Technical Summary
In modern automotive rear protection systems, metal energy-absorbing boxes are heavy and have high maintenance costs. The failure mechanism of composite material beams and metal energy-absorbing boxes fails to fully utilize the large deformation elastic energy storage of composite materials, resulting in frequent replacements.
A composite material energy-absorbing box, including an energy-absorbing core, a load-bearing frame, and a structural skin, is formed into a single piece through heat curing. Combined with fiber prepreg and molding processes, a lightweight composite material protective beam assembly is prepared. The load-bearing frame and structural skin provide radial constraint to the energy-absorbing core, achieving elastic energy storage.
It reduces self-weight and improves protective performance. Through the dual radial restraint and progressive crushing deformation of composite materials, it efficiently manages collision energy and reduces maintenance costs.
Smart Images
Figure CN122402418A_ABST