Bubbling experiment device for mechanical-electric-magnetic coupling behavior of electromagnetic intelligent material and test method

Abstract

The invention discloses a bubbling experiment device for the mechanical-electric-magnetic coupling behavior of an electromagnetic intelligent material and a test method. In the invention, the tested film material is subjected to elastic deformation, plastic deformation, interface cracking and even self fracture by a bubbling method under the effect of full coupling of the mechanical-electric-magnetic fields, and the device realizes real-time testing on the mechanical, electric and magnetic response of the tested material in the process, thereby being favorable for obtaining the information of the functional film material in multiple aspects and for understanding the internal mechanism more clearly and thoroughly; in the existing oil-pressure bubbling loading device, a closed-loop control mode is adopted to control the oil pressure loading for the first time, and multiple oil pressure loading modes are realized so as to widen the representation functions of the bubbling test device; by adopting the projection speckle and digital image related technology, the non-contact three-dimensional deformation test is realized on the film sample, and the displacement measurement accuracy is improved to 20nm; and the device and method are favorable for researching the mechanical, electric and magnetic comprehensive performance of the novel functional film material.

Description

technical field [0001] The invention belongs to the technical field of performance characterization of thin-film coating materials, and in particular relates to a bubbling experimental device and a testing method for the force-electromagnetic coupling behavior of electromagnetic smart materials. Background technique [0002] In the science and technology of thin-film coating materials, functional thin-film samples have mechanical, electrical, magnetic, thermal, optical and chemical properties that many substrate materials do not have, and have been widely used in high-performance sensors, microelectronic devices, magnetic memory and other fields , has played an irreplaceable important role in national defense construction and economic development. For example, the layered electromagnetic composite smart thin film samples developed rapidly in recent years have attracted more and more attention due to their unique thermodynamic and electromagnetic multi-field coupling properti...

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Problems solved by technology

[0005] To sum up, the reported experimental devices and test methods for the force-electromagnetic coupling behavior of electromagnetic smart materials mainly have the following deficiencies: (1) The existing test methods and devices are difficult to meet the test requirements of new electromagnetic materials. It is necessary to improve and develop new testing methods and matching experimental instruments to achieve simultaneous loading and testing of the mechanical, electrical, and magnetic performance responses of such functional materials under the coupling of three force-electromagnetic fields; (2) currently focusing on a single force Test the mechanical properties of ordinary thin film materials under the action of a field; (3) The oil pressure loading method is single, which belongs to the open-loop control mode, so it is difficult to control the magnitude and rate of the loading pressure, and it is also impossible to realize other special loading and testing methods; (4) At present The accuracy of the optical system for film displacement measurement is low, about 0.4 microns to several microns, it is difficult to test thin film samples with a small thickness, and it is easy to cause huge experimental errors

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