Nonlinear Vibration Apparatus for Soft Material Characterization
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Solution Overview
Problem
Existing methods for characterizing the mechanical properties of soft, elastic materials, such as multiphasic materials, are limited in providing a complete and accurate understanding of their elastic properties and geometry, particularly in real-time monitoring and over time.
Innovation Solution
An apparatus that induces both linear and nonlinear vibrations in soft materials, using a stimulating energy source and a vibration sensor, to measure Young's modulus, thickness, and internal static stress, allowing for improved accuracy and real-time monitoring without the need for separate test hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vibration-based testing is used to measure Young's modulus, then measurement capability is provided, but additional information such as thickness and internal stresses cannot be obtained
Solution Approach 1:
The patent changes the vibration regime from linear to nonlinear by adjusting excitation amplitude, enabling the system to extract additional material parameters (thickness, internal stresses) beyond Young's modulus through the nonlinear response characteristics
Solution Approach 2:
The vibration-based testing system is enhanced to perform multiple measurement functions simultaneously - measuring Young's modulus, thickness, and internal stresses - using a single testing apparatus and excitation mechanism
2Measurement precision
If separate test hardware is used for different material properties, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple measurement functions (Young's modulus measurement, thickness measurement, internal stress measurement) into a single vibration-based testing system, eliminating the need for separate test hardware while maintaining measurement accuracy through nonlinear vibration analysis
3Productivity
If real-time monitoring is implemented, then temporal resolution is improved, but measurement stability may be compromised
Solution Approach 1:
The system employs periodic vibration excitation with controlled amplitude to elicit nonlinear responses that can be measured in real-time while maintaining measurement stability through consistent excitation conditions and repeatable vibration cycles
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 apparatus provides a more comprehensive and accurate characterization of the elastic properties and geometry of soft materials, enabling real-time monitoring and improved accuracy in measuring Young's modulus and other material properties over time.
Implementation Method 1
excite the material with the stimulating energy source into linear and nonlinear vibrations
Implementation Method 2
measure movement of the material to provide an electrical signal measuring vibration of the material
Implementation Method 3
excite the material with the stimulating energy source into linear and nonlinear vibrations
Implementation Method 4
excite the material with the stimulating energy source into linear and nonlinear vibrations
Data Source
AI summary
An apparatus for measuring elastic properties of materials excites the material into nonlinear vibration to reveal, in a free and forced vibration signals, information about Young's modulus, internal stress, and material thickness obtained from nonlinear and linear vibration information.