Wide-Temperature Compression Test Device for High-Pressure Hydrogen
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Solution Overview
Problem
Existing compression test devices in high-pressure hydrogen environments are limited to specific temperature ranges and cannot perform complex uniaxial and biaxial compression tests, with unreliable data output and lack of authenticity verification.
Innovation Solution
A wide-temperature-range uniaxial and biaxial compression test device equipped with a test box, temperature and gas pressure sensors, displacement sensors, an oxygen/hydrogen concentration monitor, a hydrogen filling system, a vacuum extraction system, and a Digital Image Correlation (DIC) test system, controlled by an upper computer to manage temperature, pressure, and sample clamping, enabling accurate stress-strain data acquisition and analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional mechanical or electrical measurement methods are used, then contact with materials is achieved, but measurement is not suitable for high temperature environments
Solution Approach 1:
The patent replaces traditional mechanical contact measurement methods with optical measurement methods (Digital Image Correlation and fringe projection). These optical systems use cameras and light to measure displacement and strain without physical contact, enabling reliable measurements in high-temperature environments where mechanical sensors would fail.
Solution Approach 2:
The patent introduces an optical field as an intermediary between the measurement system and the high-temperature environment. The optical measurement system captures images through the transparent wall of the high-temperature container, using light as a mediator to transmit measurement information without direct contact with the hot environment.
2Adaptability or versatility
If existing compression test devices are used, then uniaxial compression testing at specific temperature is achieved, but complex uniaxial and biaxial compression tests cannot be performed
Solution Approach 1:
The patent designs a universal test device that can perform both uniaxial and biaxial compression tests using the same basic structure. The device includes a movable platform that can apply compression in one direction, and fixed platforms that can apply compression in two directions simultaneously, allowing one device to fulfill multiple testing functions without requiring separate specialized equipment.
3Measurement precision
If existing test devices are used, then engineering stress-strain data is obtained, but data authenticity and reliability cannot be verified
Solution Approach 1:
The patent implements a feedback system where optical measurement data (displacement and strain from DIC and fringe projection) continuously feeds back to verify and correct the stress-strain calculations. The upper computer compares real-time optical measurement results with theoretical expectations, providing feedback validation that ensures data authenticity and allows verification of measurement accuracy throughout the testing process.
Data Source
AI summary
A wide-temperature-range uniaxial and biaxial compression test device in a high-pressure hydrogen environment is provided. An upper computer is interacted with a temperature sensor, a gas pressure sensor, test pressure sensors, displacement sensors, an oxygen/hydrogen concentration monitor, a hydrogen filling system, a vacuum extraction system, a DIC test system, and the other components. The upper computer is used to achieve high-pressure hydrogen environment wide-temperature-range uniaxial and biaxial compression test based on different test modes. Tested engineering stress-strain data is processed to obtain real stress-strain data of rubber, and then the real stress-strain data is processed through a corresponding database to screen out a constitutive model capable of best characterizing the nonlinearity of the rubber specimen. Meanwhile, a strain distribution nephogram generated by a test result of a sample material can be analyzed, thus obtaining a deformation behavior and a failure fracture mechanism of the sample material.