Dual-Surface Bending Measurement of Conductive-Insulating Elastic Moduli
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tensile tests face difficulties in manufacturing uniform specimens and cannot measure the elastic moduli of individual materials within a composite material, while bending tests only measure the composite's modulus, not its constituents.
Innovation Solution
A method and apparatus for measuring elastic moduli through a four-point bending test, applying loads to both surfaces of a specimen comprising a conductive and insulating material, calculating bending and tensile moduli using specific equations, and employing a sensor to measure displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a tensile test is performed to measure elastic modulus, then the tensile elastic modulus can be measured, but it is difficult to manufacture uniform wire specimens and cause uniform deformation within the material
Solution Approach 1:
The patent replaces the tensile test mechanical system with a bending test system. Instead of pulling the specimen apart to measure tensile elastic modulus, the method applies a bending load and measures the bending elastic modulus, which can be obtained from the same experimental data through calculation. This substitution avoids the difficulties of manufacturing uniform wire specimens and achieving uniform deformation in tensile tests.
2Measurement precision
If a bending test is performed to measure elastic modulus, then the bending elastic modulus of composite material can be measured, but it is not possible to measure respective elastic moduli of materials constituting the composite material
Solution Approach 1:
The patent segments the measurement process into two distinct bending tests: one applying load to the first surface and another applying load to the second surface. By conducting these separate tests and using the measured values in specific equations, the method extracts and calculates the elastic moduli of individual materials (conductive material and insulating material) from the composite specimen, thereby segmenting the information extraction from the overall composite measurement.
3Measurement precision
If separate tensile tests are performed to measure elastic modulus of each material, then individual material properties can be obtained, but the testing time and complexity increase significantly
Solution Approach 1:
The patent makes the bending test apparatus multi-functional by enabling it to measure both the bending elastic modulus of the composite material and the elastic moduli of individual constituent materials through a single testing system. By applying loads to different surfaces and using the measured deflection values in specific equations, the same apparatus and methodology provide comprehensive material property data without requiring separate dedicated tensile testing equipment or procedures for each material.
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
Accurately determines the elastic moduli of both the conductive and insulating materials within a composite, enabling efficient measurement of both bending and tensile moduli without requiring separate tensile tests.
Implementation Method 1
a sensor to measure displacement
Implementation Method 2
The bending test is a test used to measure a degree at which a material is to be bent, especially, a test used to measure the characteristics in a long specimen, that is, a test for measuring a degree at which a material is bent by applying a load
Data Source
AI summary
The present disclosure relates to an apparatus and method for measuring an elastic modulus. The method of measuring an elastic modulus of a specimen including a conductive material and an insulating material with which a surface of the conductive material is coated includes a first bending test operation of applying a first load to a first surface of the specimen, a second bending test operation of applying a second load to a second surface that meets the first surface of the specimen, a first calculation operation of calculating a first bending elastic modulus of the specimen based on a first value measured in the first bending test operation, a second calculation operation of calculating a second bending elastic modulus of the specimen based on a second value measured in the second bending test operation, and a third calculation operation of calculating an elastic modulus of the conductive material and an elastic modulus of the insulating material based on the calculated first bending elastic modulus and the calculated second bending elastic modulus.