Marine Climate Environment-Bending Load Collaborative Acceleration Test Method For Metal Material

Abstract

A marine climate environment-bending load collaborative acceleration test method is provided, including conducting a static bending load loading test in an outdoor marine climate environment, conducting an alternate cycle of a dynamic bending load loading test in the outdoor marine climate environment and a test in the outdoor marine climate environment, and conducting an alternate cycle of the dynamic bending load loading test and the static bending load loading test in the outdoor marine climate environment. In the present disclosure, an acceleration rate of the marine climate environment-bending load collaborative acceleration test reaches over 8 times that of the test in the outdoor marine climate environment by taking the maximum bending force as an evaluation index, which may achieve a change from a static test to a static and dynamic combined test for examining and evaluating the environmental adaptability of the metal material.

Claims

1. A marine climate environment-bending load collaborative acceleration test method for a metal material, wherein a bending load loading device is placed in a real outdoor marine climate environment, and the test method comprises: (1) conducting a static bending load loading test in the outdoor marine climate environment, wherein, a continuous loading test is conducted on a test piece with a stress ratio of 1 and a static bending load of 0.3 F.sub.bb every day, within a test period of 10 to 45 days; (2) conducting an alternate cycle of a dynamic bending load loading test in the outdoor marine climate environment and a test in the outdoor marine climate environment, wherein, a sine-wave loading waveform with a maximum dynamic bending load of 0.3 F.sub.bb, a minimum dynamic bending load of 0.03 F.sub.bb and a frequency of 5 Hz, is loaded on the test piece for 15 minutes in the morning and 15 minutes in the afternoon every day, and the test in the outdoor marine climate environment is conducted in a rest of time, within a test period of 10 to 45 days; and (3) conducting an alternate cycle of a dynamic bending load loading test and a static bending load loading test in the outdoor marine climate environment, wherein, a sine-wave loading waveform with the maximum dynamic bending load of 0.3 F.sub.bb, the minimum dynamic bending load of 0.03 F.sub.bb, and the frequency of 5 Hz is loaded on the test piece for 15 minutes in the morning and 15 minutes in the afternoon every day, and a continuous loading test is conducted on the test piece with the static bending load of 0.3 F.sub.bb in the rest of time, within a test period of 10 to 45 days, wherein, the F.sub.bb is a maximum bending force of the metal material; an acceleration rate of the static bending load loading test in the outdoor marine climate environment, the alternate cycle of the dynamic bending load loading test in the outdoor marine climate environment and the test in the outdoor marine climate environment, and the alternate cycle of the dynamic bending load loading test and the static bending load loading test in the outdoor marine climate environment, is evaluated relative to the test in the outdoor marine climate environment, by detecting the maximum bending force of the test piece every period until the test is ended and taking the maximum bending force as an environmental adaptability evaluation index of the metal material.

2. The marine climate environment-bending load collaborative acceleration test method for the metal material according to claim 1, wherein, in the test in the outdoor marine climate environment, the test piece is placed in a same real outdoor marine climate environment to detect, within performance detection periods of 3 months, the maximum bending force of the test piece in each period.

3. The marine climate environment-bending load collaborative acceleration test method for the metal material according to claim 2, wherein, in the test in the outdoor marine climate environment, the test piece faces south and forms an inclination angle of 45° with a horizontal.

4. A marine climate environment-bending load collaborative acceleration test method for a metal material, wherein a bending load loading device is placed in a real outdoor marine climate environment, and the test method comprises: (1) conducting a test in the outdoor marine climate environment, wherein the test piece is placed in a same real outdoor marine climate environment to detect, within performance detection periods of 3 months, a maximum bending force of the test piece in each period; (2) conducting a static bending load loading test in the outdoor marine climate environment, wherein test parameters comprise: a static bending load: 0.3 F.sub.bb, wherein F.sub.bb is the maximum bending force of the metal material; a stress ratio: 1; a test period: 10 to 45 days; and static bending load loading time: loading continuously until the test is ended; (3) conducting an alternate cycle of a dynamic bending load loading test in the outdoor marine climate environment and a test in the outdoor marine climate environment, wherein parameters of the dynamic bending load loading test in the outdoor marine climate environment comprise: a maximum dynamic bending load: 0.3 F.sub.bb, wherein F.sub.bb is the maximum bending force of the metal material; a minimum dynamic bending load: 0.03 F.sub.bb, wherein F.sub.bb is the maximum bending force of the metal material; a dynamic bending loading frequency: 5 Hz; a dynamic bending loading waveform: sine wave; a test period: 10 to 45 days; and dynamic bending load loading time: loading twice a day, once in the morning and once in the afternoon, and 15 minutes each time; the alternate cycle comprises the dynamic bending load loading test in the outdoor marine climate environment and the test in the outdoor marine climate environment; and the dynamic bending load loading test in the outdoor marine climate environment and the test in the outdoor marine climate environment are alternately cycled in sequence; (4) conducting an alternate cycle of a dynamic bending load loading test and a static bending load loading test in the outdoor marine climate environment, wherein parameters of the dynamic bending load loading test in the outdoor marine climate environment comprise: the maximum dynamic bending load: 0.3 F.sub.bb, wherein F.sub.bb is the maximum bending force of the metal material; the minimum dynamic bending load: 0.03 F.sub.bb, wherein F.sub.bb is the maximum bending force of the metal material; the dynamic bending loading frequency: 5 Hz; the dynamic bending loading waveform: sine wave; the test period: 10 to 45 days; the static bending load: 0.3 F.sub.bb, wherein F.sub.bb is the maximum bending force of the metal material; bending load loading time: loading the dynamic bending load twice a day, once in the morning and once in the afternoon, and 15 minutes each time, and the rest time being the static bending load loading time.

5. The marine climate environment-bending load collaborative acceleration test method for the metal material according to claim 4, wherein an evaluating method comprises: performing comparative analysis on acceleration performance of the marine climate environment-bending load collaborative acceleration test relative to that of the test in the outdoor marine climate environment, based on results of the test in the outdoor marine climate environment, by taking the maximum bending force as an evaluation index.

6. The marine climate environment-bending load collaborative acceleration test method for the metal material according to claim 4, wherein in the test in the outdoor marine climate environment, the test piece faces south and forms an inclination angle of 45° with a horizontal.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 is a load coupling test device for marine climate environment-pulling, pressing, and bending conditions;

[0020] FIG. 2 is a dimension and specification drawing of a test piece; and

[0021] FIG. 3 shows maximum bending force comparison curves of 7A09 aluminum alloy in two tests.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present disclosure will be described below in detail in combination with specific embodiments and accompanying drawings.

[0023] FIG. 1 is a load coupling test device for marine climate environment-pulling, pressing, and bending conditions, which is mounted in a nearshore testing site of Hainan Warming Test Station with typical hot and humid marine atmospheric environment. FIG. 2 shows a dimension and specification drawing of a test piece.

[0024] The test method of the present disclosure includes:

[0025] (1) Test in the outdoor marine climate environment

[0026] The test is conducted in the nearshore testing site of Hainan Wanning Test Station, where the test piece faces south and forms an inclination angle of 45° with the horizontal, the performance detection period is 3 months, namely four performance detections are performed in one year, and the maximum bending force of the test piece is detected in each period.

[0027] (2) Static bending load loading test in the outdoor marine climate environment

[0028] Test parameters include:

[0029] a static bending load: 0.3 F.sub.bb, where F.sub.bb is the maximum bending force of the metal material;

[0030] a stress ratio: 1;

[0031] a test period: 10 to 45 days; and

[0032] static bending load loading time: loading continuously until the test is ended.

[0033] (3) Alternate cycle of a dynamic bending load loading test in the outdoor marine climate environment and the test in the outdoor marine climate environment

[0034] Parameters of the dynamic bending load loading test in the outdoor marine climate environment include:

[0035] the maximum dynamic bending load: 0.3 F.sub.bb, where F.sub.bb is the maximum bending force of the metal material;

[0036] the minimum dynamic bending load: 0.03 F.sub.bb, where F.sub.bb is the maximum bending force of the metal material;

[0037] a dynamic bending loading frequency: 5 Hz;

[0038] a dynamic bending loading waveform: sine wave;

[0039] a test period: 10 to 45 days; and

[0040] dynamic bending load loading time: loading twice a day, once in the morning and once in the afternoon, and 15 minutes each time.

[0041] The alternate cycle of the dynamic bending load loading test in outdoor marine climate environment and the test in the outdoor marine climate environment specifically includes the dynamic bending load loading test in the outdoor marine climate environment and the test in the outdoor marine climate environment alternately cycled with specific cycles as follows:

[0042] 15 minutes of the dynamic bending load loading test in the outdoor marine climate environment (in the morning)+the test in the outdoor marine climate environment+15 minutes of the dynamic bending load loading test in the outdoor marine climate environment (in the afternoon)+the test in the outdoor marine climate environment+ . . .

[0043] (4) Alternate cycle of the dynamic bending load loading test and the static bending load loading test in the outdoor marine climate environment

[0044] Parameters of the dynamic bending load loading test in the outdoor marine climate environment include:

[0045] the maximum dynamic bending load: 0.3 F.sub.bb, where F.sub.bb is the maximum bending force of the metal material;

[0046] the minimum dynamic bending load: 0.03 F.sub.bb, where F.sub.bb is the maximum bending force of the metal material;

[0047] the dynamic bending loading frequency: 5 Hz;

[0048] the dynamic bending loading waveform: sine wave;

[0049] the test period: 10 to 45 days;

[0050] the static bending load: 0.3 F.sub.bb, where F.sub.bb is the maximum bending force of the metal material; and

[0051] bending load loading time: loading the dynamic bending load twice a day, once in the morning and once in the afternoon, and 15 minutes each time, and the rest time being the static bending load loading time.

[0052] The alternate cycle of the dynamic bending load loading test and the static bending load loading test in the outdoor marine climate environment specifically includes the dynamic bending load loading test in the outdoor marine climate environment and the static bending load loading test in the outdoor marine climate environment alternately cycled with specific cycles as follows:

[0053] 15 minutes of the dynamic bending load loading test in the outdoor marine climate environment (in the morning)+the static bending load loading test in the outdoor marine climate environment+15 minutes of the dynamic bending load loading test in the outdoor marine climate environment (in the afternoon)+the static bending load loading test in the outdoor marine climate environment+ . . .

[0054] The present disclosure performs comparative analysis on acceleration performance of the marine climate environment-bending load collaborative acceleration test relative to that of the test in the outdoor marine climate environment based on the results of the test of outdoor marine climate environment, by taking the maximum bending force as an evaluation index.

[0055] Specifically, a bare material 7A09 aluminum alloy is selected as the test piece. The present embodiment describes the marine climate environment-bending load collaborative acceleration test method for the metal material of the present disclosure by taking the dynamic bending load loading test in the outdoor marine climate environment and the test in the outdoor marine climate environment as examples.

[0056] FIG. 3 shows maximum bending force comparison curves of 7A09 aluminum alloy in two tests. It can be seen from FIG. 3 that the maximum bending force of the 7A09 aluminum alloy is reduced by 11.7% after 45 days of the marine climate environment-bending load collaborative acceleration test, and the maximum bending force of the 7A09 aluminum alloy is reduced by 5.0% after 1 year of the test in the outdoor marine climate environment. The result shows that the acceleration rate of the marine climate environment-bending load collaborative acceleration test reaches over 8 times that of the tests in the outdoor marine climate environment.

[0057] The technical solution provided by the embodiment of the present disclosure is described in details above. The principle and implementation of the present disclosure are illustrated herein by specific examples. The description of the above embodiment is only for helping to understand the principle of the embodiment of the present disclosure. Meanwhile, for those of ordinary skill in the art, there will be changes in specific implementation and application scope according to the embodiment of the present disclosure. In conclusion, the content of the specification should not be construed as a limitation to the present disclosure.