Carbon Composite Dynamic Analysis via Single Specimen Prediction

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Solution Overview

Problem

Conventional methods for analyzing dynamic characteristics of carbon composite materials are limited in predicting system parameters and determining optimal carbon fiber orientations before manufacturing, requiring multiple specimen preparations and costly testing processes.

Innovation Solution

A method that uses data from a single carbon fiber orientation to predict structural stiffness and viscous damping coefficient values for various angles through a process involving data collection, system parameter calculation, sensitivity calculation, system parameter approximation, and estimation, utilizing curve-fitting methods and modal tests to estimate system parameters for arbitrary carbon fiber orientations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If multiple specimen preparations and costly testing processes are used to analyze dynamic characteristics of carbon composite materials, then measurement precision and reliability of system parameters are improved, but device complexity and loss of time increase

Engineering Contradiction:

Improveprecision of system parametersVSAvoidtime for specimen preparation and testing

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent performs preliminary modal tests on a single reference specimen to obtain system parameters before the main analysis. By pre-acquiring mass, stiffness, and damping parameters from one specimen, the method eliminates the need for multiple specimen preparations and tests, thereby reducing time loss while maintaining measurement precision through subsequent calculation procedures.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent creates a computational model that copies the physical system's behavior. By using data from one physical specimen to build a mathematical model, the system can predict dynamic characteristics for various carbon fiber orientations without physically creating and testing multiple specimens, thus reducing time and resource consumption while preserving measurement accuracy.

Inventive Principle:

Principle #26Copying

2Measurement precision

Engineering Contradiction:

Improveprecision of system parametersVSAvoidcomplexity of testing process

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent extracts the essential system parameters (mass, stiffness, damping) from a single reference specimen through modal testing. By separating and independently calculating each parameter rather than requiring complete physical replication, the method simplifies the testing process while maintaining the precision needed for accurate dynamic characteristic analysis.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical testing system with a computational calculation system. Instead of physically preparing and testing multiple specimens with complex testing apparatus, the method uses mathematical models and calculations to determine dynamic characteristics, thereby reducing device complexity while preserving measurement precision through validated computational procedures.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If conventional modal test methods are used to obtain data for each specimen, then measurement precision is improved, but productivity decreases due to repeated testing

Engineering Contradiction:

Improveprecision of dynamic characteristics dataVSAvoidefficiency of analysis process

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent creates a universal calculation procedure that can determine dynamic characteristics for carbon composite materials with any carbon fiber orientation using data from a single reference specimen. This multi-functional approach allows the same computational method to handle various orientations and material configurations, thereby improving productivity while maintaining the precision of individual case analyses.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent performs preliminary modal testing on one reference specimen to obtain baseline system parameters before conducting the main analysis. By pre-acquiring essential data (mass, stiffness, damping) from a single test, the method eliminates the need for repeated testing across different orientations, thus improving productivity while preserving measurement precision through subsequent computational procedures.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20230228657A1Method for analyzing dynamic characteristics of carbon composite materials with respect to the carbon fiber angle

Publication Date: 2023.07.20 PUKYONG NAT UNIV IND ACADEMIC COOPERATION FOUND

AI summary

This application relates to a method for analyzing the dynamic characteristics of carbon composite materials. In the method, a specimen for a specific carbon fiber orientation is prepared and a modal test is performed on the specimen to obtain data and analyze the characteristics of the specimen on the basis of the data. To solve conventional carbon composite material dynamic characteristic analysis methods for carbon composite materials, the proposed method can determine the orientation of carbon fiber orientation exhibiting desired dynamic characteristics by predicting various system parameters at the state of designing, i.e., before the manufacture of a carbon composite material. Especially, the method predicts system parameters such as structural stiffness and viscous damping coefficient which are very sensitive to the orientation of carbon fiber, using only data of a single reference orientation, and reflects the prediction results on the design of a carbon composite material.