Fiber-Reinforced Porous Body Structure for Impact and Rigidity
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Solution Overview
Problem
Existing fiber-reinforced plastic structures with voids lack sufficient impact strength due to insufficient fixation of reinforcing fibers, leading to inadequate rigidity and strength.
Innovation Solution
A porous body composed of carbon fibers (50-99% by weight) and organic fibers (1-50% by weight) with specific tensile elongation, fixed by a resin, forming a structure with 10-95% porosity and bonded intersections, where voids are present without reinforcing fibers or resin, achieving uniform dispersion and controlled orientation angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If voids are formed in fiber-reinforced plastic structures, then lightweightness is improved, but impact strength becomes insufficient
Solution Approach 1:
The invention uses a composite structure combining carbon fibers (providing rigidity and strength) with rubber elastic resins (providing impact strength and flexibility). This composite material approach allows the porous body to achieve both lightweightness through voids and sufficient impact strength through the rubber elastic component, resolving the contradiction between weight reduction and impact resistance.
2Strength
If resin showing rubber elasticity is used to improve impact strength, then impact strength is improved, but reinforcing fibers cannot be effectively fixed, leading to insufficient rigidity
Solution Approach 1:
The invention combines rubber elastic resin with carbon fibers in a composite structure where the carbon fibers provide rigidity and strength while the rubber elastic resin provides impact strength. The synergistic effect of this composite material allows both rigidity and impact strength to be achieved simultaneously, overcoming the limitation of using rubber elastic resin alone.
Solution Approach 2:
The invention creates local quality differentiation within the porous body by having carbon fibers concentrated in specific regions to provide rigidity and strength, while rubber elastic resin is distributed throughout to provide impact strength and flexibility. This local quality approach allows different regions to perform different functions, resolving the contradiction between rigidity and impact strength.
3Stress or pressure
If reinforcing fibers are used to improve rigidity and strength, then rigidity and strength are improved, but fiber fixation becomes insufficient in rubber elastic resin structures
Solution Approach 1:
The invention uses a composite material system where carbon fibers are embedded in rubber elastic resin, creating strong interfacial bonding that ensures reliable fiber fixation. The carbon fibers provide rigidity and strength while the rubber elastic resin matrix ensures proper fiber fixation and stress distribution, resolving the issue of insufficient fiber fixation in rubber elastic structures.
Data Source
AI summary
A porous body including: carbon fibers (A) at more than 50% by weight and not more than 99% by weight, and organic fibers (B) having a tensile elongation at break of 2.5 to 100% at not less than T % by weight and less than 50% by weight, as reinforcing fibers; and a resin (C); the reinforcing fibers being fixed by the resin (C), the porous body having a porosity of 10 to 95% by volume. A porous body of a fiber-reinforced plastic with excellent lightweightness, impact strength, and rigidity is provided.