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Test system and test method of multiphysics fatigue property

A fatigue performance testing, multi-physics technology, applied in measurement devices, strength characteristics, instruments, etc., can solve problems such as the inability to effectively evaluate the fatigue performance of small piezoelectric ceramic samples, and achieve the effect of high test accuracy

Inactive Publication Date: 2009-12-30
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Benefits of technology

This technology allows researchers to study materials that have been subjected to different types of stress or strain during their use over time without causing any harming them permanently. It also includes various tests such as dynamic loading (FLD) resistance, thermal shock strengthening, impact toughness analysis, etc., which help predict how well these materials will perform when used at near loads. Overall, this innovation enables better understanding of the behavioral mechanisms behind degradations caused by external factors like heat exposure, electrical current flow, temperature changes, pressure differences, moist environments, and other environmental influences.

Problems solved by technology

This patents discusses various ways to improve the durability and reliance of ceramsite materials by studying them' physical characteristics like stress cracking resistance, impact compression load carrying capacity, and energy dissipativity. These technical means include conductor mechanically coupled plasma excitation experiments conducted over time without causing crack formation, which makes it challenged to accurately determine the fatiguesthetic response caused by these materials. Additionally, current laboratory technologies lack effective tools capable of simulating multiple fields of weakening and debilitizing effects associated with smaller sized ceramites.

Method used

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Embodiment approach

[0050] Step 1: Refer to attached figure 1 , the PZT sample (6) is built into the mold (4), and the center of the sample (6) is located on the axis of the mold (4), and the upper and lower surfaces of the sample (6) are connected to the high and low voltage of the high voltage power supply (21) respectively. terminal connection, refer to the attached figure 2 , the acoustic emission sensor (31) is connected to the outer surface of the mold (4);

[0051] Step 2: Set the material mechanical performance testing machine (11) to provide the amplitude (2N), frequency (5Hz) and waveform (half sine wave) of the load, the current form (AC) and the test voltage (1kV) provided by the high-voltage power supply (21) ;

[0052] Step 3: Start the material mechanical performance testing machine (11) and the high-voltage power supply (21), apply the electromechanical cyclic load in the vertical direction to the PZT sample (6), and give the electromechanical coupling cyclic loading by the aco...

Embodiment 2

[0058] Implementation method of fatigue performance evaluation and life prediction of lead zirconate titanate (PZT) samples based on real-time monitoring of material damage and destruction under force-thermoelectric coupling conditions

[0059] With reference to specific embodiment 1, in step 1, with reference to the attached Figure 4 , connect one end of the waveguide rod (35) to the outer surface of the mold (4), and connect the other end to the acoustic emission sensor (31), refer to the attached image 3 , 4 , and further place the mold (4), part of the waveguide rod (35) in the cavity of the high temperature furnace (51); in step 2, further set the test temperature (120°C) of the high temperature furnace (51), and the high voltage power supply (21) test voltage (0.8kV); in step 3, start the high temperature furnace (51) further, carry out the cyclic loading of force thermoelectric coupling; other steps of force thermoelectric coupling are with the steps 4-7 of specific ...

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Abstract

The invention relates to a test system and a test method of multiphysics fatigue property, in particular to a fatigue property test system, a fatigue property evaluation and a life prediction method under the condition of coupling between power electricity and power thermoelectricity based on material damage and real-time monitoring damage, belonging to the field of material property evaluation. The fatigue property of piezoelectric ceramics small samples cannot be evaluated easily under the condition of coupling between power electricity and power thermoelectricity by current test device and test technique due to the restrictions of test device and test platform, thus restricting the application development of piezoelectric ceramics materials and devices. Aiming at the existing problems, the invention completes reasonable selection and optimal combination design of force field, thermal field, electric field and acoustic emission in the fatigue property test system and a mould which is applicable to an MSP method, and provides the fatigue property evaluation and life prediction method of small samples; on the basis, the fatigue property evaluation and life prediction of piezoelectric ceramics and other samples which are based on material damage and real-time monitoring damage can be realized in the coupling field of power electricity and power thermoelectricity.

Description

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Claims

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Application Information

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Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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