FRP Anchor Wedge Profile for High-Load Stress Distribution
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Solution Overview
Problem
Fiber-reinforced polymer (FRP) materials, particularly carbon FRP, face challenges in anchoring due to low transverse compressive strength, leading to breakage at anchor points, and conventional anchor systems are large, expensive, laborious to install, and have limited load-carrying capacity.
Innovation Solution
A compact anchor system featuring a wedge with a non-linear profile and an outer casing with both linear and non-linear inner profiles, which distributes gripping stress across the FRP material, eliminating stress concentration and allowing for higher load-carrying capacity without the need for curing, using a frictional gripping mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional anchor systems are used for FRP materials, then anchoring is achieved, but the anchor size becomes very large and load-carrying capacity is limited
Solution Approach 1:
The wedge component features a non-linear profile with curved surfaces that mate with corresponding non-linear inner profiles in the outer casing. This curved geometry distributes gripping stress more effectively across the FRP material compared to conventional linear profiles, enabling higher load-carrying capacity in a more compact anchor configuration.
2Ease of operation
If conventional anchor systems are used for FRP materials, then anchoring is achieved, but installation becomes laborious and time-consuming
Solution Approach 1:
The anchor system is divided into distinct modular components: an outer casing and a separate wedge that is driven into the casing to achieve anchoring. This segmentation allows for simpler, faster installation compared to monolithic conventional anchors, as the wedge can be independently positioned and secured within the casing without complex assembly procedures.
3Reliability
If FRP materials are anchored using conventional methods, then anchoring is achieved, but stress concentration occurs leading to breakage at anchor points
Solution Approach 1:
The non-linear profile of the wedge and corresponding outer casing creates a variable stress distribution along the anchoring interface. The curved geometry provides greater contact area and more uniform stress distribution at critical regions, reducing stress concentration points that would otherwise lead to FRP material breakage and improving overall anchoring reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The anchor system effectively reduces the risk of failure modes such as debonding and stress concentration, enabling the full tensile capacity of FRP plates to be achieved while being compact and lightweight, thus suitable for structural rehabilitation and new construction.
Implementation Method 1
using a frictional gripping mechanism
Data Source
AI summary
An anchor system for fiber reinforced polymer (FRP) material having an outer casing including a linear inner profile portion; and a non-linear inner profile portion, both on an inner surface of the outer casing. The anchor further having a wedge configured to be housed by the inner profile of the outer casing, the wedge including: a linear outer profile portion configured to mate with the linear inner profile portion of the outer casing; a non-linear outer profile portion configured to mate with the non-linear inner portion of the outer casing, both on the outer surface of the wedge; and an inner gap formed in the wedge and configured to receive the FRP material.