Tensile creep testing device capable of testing multiple groups of samples synchronously under temperature and humidity control condition

Abstract

The invention provides a tensile creep testing device capable of testing multiple groups of samples synchronously under the temperature and humidity control condition. The tensile creep testing device comprises a temperature control system, a humidity control system, a sample chamber and a computer system. The computer system controls the temperature and the humidity of the sample chamber through the temperature control system and the humidity control system, a temperature sensor, a humidity sensor and tensile creep testing device bodies are arranged in the sample chamber, and the temperature sensor and the humidity sensor are connected with the computer system. Each tensile creep testing device body comprises guide rods, a dynamical sensor, a strain gage, bolts, a top plate, a middle plate, threaded rods, a bottom plate, an upper clamp and a lower clamp, wherein the dynamical sensor is arranged in the middle of the movable top plate, the upper clamp is arranged below the dynamical sensor, the lower clamp is fixed to the middle of the movable middle plate, a sample to be tested is arranged between the upper clamp and the lower clamp, the strain gage is pasted on the middle of the sample to be tested, and the strain gage and the dynamical sensor are connected with the computer system. The tensile creep testing device can precisely control the temperature and the humidity within a wide temperature range and a full humidity range and can also test the creep of multiple groups of samples synchronously, so that experimental time is saved.

Description

technical field [0001] The invention discloses a material performance testing device, such as a performance testing device for metal, plastic, rock and ceramic materials, etc., which is specifically a tensile creep test device for synchronously testing multiple groups of samples under temperature control and humidity conditions, belonging to The technical field of material performance testing. Background technique [0002] Creep refers to the phenomenon that the strain of a solid material increases with time under the condition of keeping the stress constant; creep is different from plastic deformation, and plastic deformation usually occurs after the stress exceeds the elastic limit, while creep only needs the action of stress For a relatively long time, it can also occur when the stress is less than the force applied by the elastic limit. Many materials (such as metals, plastics, rocks and ceramics, etc.) exhibit the property of creep under certain conditions, so many eng...

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Problems solved by technology

[0004] At present, there are some deficiencies in the experimental devices used by major domestic research institutes and universities. For example, the Chinese invention patent (application number: ZL2011104124601) discloses a creep test device and its test method, which maintains constant pressure by controlling weights. , use a vernier caliper with a watch to ensure the progress of displacement measurement, so as to characterize the creep performance of materials, but this device has the following defects: (1) There is no device for accurately controlling temperature and humidity, so it is impossible to characterize the creep of materials under specific temperature and humidity performance; (2) The device cannot test the creep properties of multiple groups of samples at the same time, so it takes a long time to test a large number of samples

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