Pressure-Membrane Test Vessel for Steady and High-Frequency Loads
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Solution Overview
Problem
Existing testing devices struggle to apply both high magnitude steady and high frequency alternating forces simultaneously on mechanical components, with hydraulic actuation systems being inadequate for alternating forces and piezo-electric actuation systems limited by small displacements and constant forces.
Innovation Solution
A system utilizing a pressure vessel with a first and second chamber separated by an actuating membrane, combined with an electromagnetic actuator, applies both steady and alternating forces on a test piece through hydraulic and time-varying mechanisms, enabling simultaneous application of service representative conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a hydraulic actuation system is used to apply high magnitude steady force, then the steady force capability is improved, but the ability to apply high frequency alternating force deteriorates
Solution Approach 1:
The system divides the force application function into two separate actuation systems: a hydraulic actuation system for applying steady force and a piezo-electric actuation system for applying alternating force. This segmentation allows each subsystem to be optimized for its specific function, resolving the contradiction between steady force magnitude and alternating force frequency capability
Solution Approach 2:
The system merges the hydraulic actuation system and piezo-electric actuation system into a single integrated testing apparatus that applies both steady and alternating forces simultaneously on the test specimen. The combined system enables comprehensive mechanical testing that replicates real-world loading conditions
2Speed
If a piezo-electric actuation system is used to apply high frequency alternating force, then the alternating force capability is improved, but the steady force magnitude capability deteriorates
Solution Approach 1:
The system separates the actuation functions into distinct subsystems where the piezo-electric actuator handles only the alternating force component while the hydraulic system provides the steady force. This segmentation prevents the piezo-electric system from being overloaded beyond its displacement and force capabilities
3Device complexity
If a single actuation system is used to apply both steady and alternating forces, then the device complexity is reduced, but the ability to simultaneously apply service representative conditions deteriorates
Solution Approach 1:
The system employs separate actuation systems for steady and alternating forces, each optimized for its specific function. This segmentation enables accurate replication of service representative conditions that require both high magnitude steady forces and high frequency alternating forces simultaneously
Solution Approach 2:
The integrated testing apparatus provides multi-functionality by combining hydraulic and piezo-electric actuation capabilities in a single system, enabling it to apply various combinations of steady and alternating forces to test different mechanical components under diverse loading conditions
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 system accurately determines the durability and mechanical integrity of mechanical components by replicating real-time operational loads, allowing for precise prediction of service life and enabling simultaneous testing of multiple components.
Implementation Method 1
The actuating membrane is configured to apply a second pressure on the second fluid within the second chamber in response to the application of the first pressure by the first fluid on the actuating membrane
Implementation Method 2
an actuator engaged with the actuating membrane and configured to apply a time-varying force on the actuating membrane
Implementation Method 3
The piezo-electric actuation system typically includes a piezo-electric actuator that converts electrical energy into mechanical displacement based on piezo-electric effect
Data Source
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AI summary
There is provided a system (50, 150, 250) for testing at least one test piece (10). The system (50, 150, 250) includes a pressure vessel (100) including a first chamber (102) receiving a first fluid (F1) at a first pressure (P1). The pressure vessel (100) further includes a second chamber (104) receiving a second fluid (F2). The pressure vessel (100) further includes an actuating membrane (106) fluidly separating the first chamber (102) from the second chamber (104). The system (50, 150, 250) further includes a test vessel (200) including an internal chamber (202) disposed in fluid communication with the second chamber (104). The test vessel (200) further includes at least one test wall (204) coupled to the at least one test piece (10). The system (50, 150, 250) further includes an actuator (108) engaged with the actuating membrane (106) and configured to apply a timevarying force (N4) on the actuating membrane (106) while the first pressure (P1) is being applied by the first fluid (F1) on the actuating membrane (106).