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A test method for simulating environmental stress
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A test method and technology for simulating environment, applied in measurement devices, instruments, scientific instruments, etc., can solve problems such as listing and system failure, and achieve the effects of easy operation, cost reduction, cost and time saving
Active Publication Date: 2015-08-26
DELPHI ELECTRONICS SUZHOU
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Problems solved by technology
Sometimes even if the materials of some parts of the transmission system have a performance retention rate higher than 75% or even 80% in the transmission oil, the materials of these parts of the transmission system may still be listed due to the influence of stress, thus cause the whole system to fail
[0003] At present, there is no well-formed test method to directly study the performance of various materials in high-temperature transmission oil and withstand a certain load from the level of raw materials, so as to judge which materials can be used in long-term high-temperature transmissions. Oil and under a certain stress (or load) working environment
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Embodiment 1
[0019] A test method for simulating environmental stress, comprising the following steps:
[0020] (1) Clamp the material sample 1 with clamps 2 with different radii, such as figure 1 As shown, the material sample 1 has a linear structure, and then the material sample is soaked in commercially available Dexron-VI grade transmission oil, which is contained in a pressure vessel;
[0021] (2) Put the pressure vessel into an explosion-proof furnace, and then conduct a high-temperature experiment, heat the temperature of the transmission oil to 150°C, control the soaking time of the material to 500h, 1000h and 2000h, then take out the material sample, and test the material sample The mechanical properties, including tensile strength, deformation, bending strength, flexural modulus, tensile modulus, weight change, etc. are tested, and compared with the properties of the material sample that has not been clamped (stressed), so as to obtain the material performance retention. In add...
Embodiment 2
[0023] A test method for simulating environmental stress, comprising the following steps:
[0024] (1) Clamp the material sample with fixtures with different radii. The material sample has an arc-shaped structure, and soak it in commercially available ATF-212-B transmission oil, which is contained in a pressure vessel middle;
[0025] (2) Put the pressure vessel into an explosion-proof furnace, and then conduct a high-temperature experiment, heat the temperature of the transmission oil to 150°C, control the soaking time of the material to 500h, 1000h and 2000h, then take out the material sample, and test the material sample The mechanical properties, including tensile strength, deformation, bending strength, flexural modulus, tensile modulus, weight change, etc. are tested, and compared with the properties of the material sample that has not been clamped (stressed), so as to obtain the material performance retention. In addition, it is also judged whether there is stress cra...
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Abstract
The invention relates to a testing method simulating environmental stress. According to the invention, material samples are fixed by using fixtures with different diameters, and are soaked into transmission oil which is contained in a pressure vessel; the pressure vessel is placed in an explosion-proof furnace and is subjected to high-temperature experiment; the temperature of the transmission oil is heated to 150 DEG C, and material soaking time is controlled at 500-2000h; the material sample is fetched, and material performances such as tensile strength, deformation, bending strength, bending modulus, tensile modulus, and weight change are tested. Compared with prior arts, the method is safe and reliable, and has the advantages such as wide application range, reduced cost, convenient experiment, and the like.
Description
technical field [0001] The invention relates to a stress testing method, in particular to a testing method for simulating environmental stress. Background technique [0002] The automotive transmission system needs to work at 150°C, and some components in the transmission system, such as connectors, will be stressed (or loaded) and need to be in direct contact with the transmission fluid. Sometimes even if the materials of some parts of the transmission system have a performance retention rate higher than 75% or even 80% in the transmission oil, the materials of these parts of the transmission system may still be listed due to the influence of stress, thus cause the entire system to fail. [0003] At present, there is no well-formed test method to directly study the performance of various materials in high-temperature transmission oil and withstand a certain load from the level of raw materials, so as to judge which materials can be used in long-term high-temperature transm...
Claims
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Application Information
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