3D Deformed Concrete Fiber with Offset Anchor Segments
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Concrete is a brittle material with poor tensile strength, and existing fiber reinforcement methods do not effectively control crack nucleation and propagation, limiting its toughness and energy absorption capacity.
Innovation Solution
Concrete reinforcing members with elongated bodies and radially offset anchor segments, arranged at angles greater than 0 degrees and less than 90 degrees, are integrated into the concrete matrix to enhance anchoring and control crack propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional straight or coplanar-deformed fibers are used, then manufacturing is simple, but crack control effectiveness is poor
Solution Approach 1:
The fiber features asymmetric deformations where adjacent lateral extensions are rotated relative to each other by an angle greater than 0 degrees and less than 90 degrees about the fiber axis. This asymmetric configuration creates unequal stress distribution that more effectively impedes crack propagation compared to symmetric coplanar deformations, while remaining manufacturable through conventional deformation processes.
Solution Approach 2:
The invention transitions from coplanar deformations (all lateral extensions in one plane) to three-dimensional deformations where lateral extensions are distributed across multiple planes through rotation about the fiber axis. This adds a rotational dimension to the deformation geometry, enabling the fiber to interact with cracks propagating in multiple directions and improving overall crack control effectiveness.
2Strength
If fibers with lateral extensions are used to improve anchoring, then anchoring strength increases, but crack propagation control deteriorates
Solution Approach 1:
By rotating adjacent lateral extensions by an asymmetric angle (greater than 0 degrees and less than 90 degrees), the fiber creates non-uniform stress fields around the crack tip. This asymmetric stress distribution prevents cracks from easily propagating along the fiber interface while maintaining strong anchoring, as the crack must navigate through a more complex stress environment rather than following a predictable path.
Solution Approach 2:
The rotational arrangement of lateral extensions distributes anchoring forces across multiple planes rather than concentrating them in a single coplanar configuration. This three-dimensional arrangement enhances both anchoring strength through increased surface area engagement and crack control by preventing cracks from propagating in any single preferred direction.
3Ease of manufacture
If anchor segments are arranged coplanar, then manufacturing is easier, but toughness enhancement is limited
Solution Approach 1:
The asymmetric angular arrangement of anchor segments (rotated by greater than 0 degrees and less than 90 degrees) maintains manufacturing feasibility through conventional fiber deformation processes while significantly enhancing toughness. The asymmetric configuration creates more effective stress distribution and energy absorption mechanisms during crack propagation, leading to improved toughness compared to coplanar arrangements.
Solution Approach 2:
By rotating anchor segments about the fiber axis to create a three-dimensional arrangement, the invention enhances toughness by enabling the fiber to interact with cracks propagating in multiple directions. This dimensional change from coplanar to spatial arrangement increases the energy required for crack propagation while remaining compatible with standard manufacturing processes.
Data Source
AI summary
A concrete reinforcing member for admixture into a concrete composite. The concrete reinforcing member has a body extending in a longitudinal direction along an axis, the body having a lateral width. At least two anchor segments are axially spaced on the body, each anchor segment having at least one lateral extension projecting in a lateral direction along an associated plane that extends radially relative to the axis of the body. The associated plane of the lateral extension of one of the anchor segments is offset radially about the axis at an angle of greater than 0° and less than 90° relative to the associated plane of the lateral extension of the other anchor segment.