A stress loading device for batch stress corrosion tests of composite materials

Abstract

The present invention discloses a stress loading device for batch stress corrosion tests of composite materials, which includes a base, a column, a pressing plate, a support, a rotating block, a specimen chuck, a screw, a threaded through-hole and a groove. The top end of the base is fixedly connected with the column, and the top end of the column is fixedly connected with the pressing plate. At the same time, a threaded through-hole corresponding to the screw is provided on the base. One end of the screw is fixedly connected with the rotating block; the other end of the screw is located in the groove provided on the pressing plate. On the side of the pressing plate close to the base, multiple groups of supports are fixedly installed in parallel, and at the corresponding height position of each group of supports, a specimen chuck is fixedly installed. This stress loading device for batch stress corrosion tests of composite materials has a simple structure, is easy to install and disassemble, and is convenient to operate, providing conditions for batch environmental exposure tests of composite material specimens under simulated mechanical load states, and has broad application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material load and environmental coupling service conditions, and particularly relates to a stress loading device for batch stress corrosion tests of composite materials. Background Art

[0002] Due to the advantages of high specific strength, light structural weight, and designable performance, composite materials are currently widely used in main load-bearing structures, secondary load-bearing structures, and components of equipment such as ships, and have become key materials that support national high-tech. The wide application of composite materials also puts forward higher requirements for their durability in harsh natural environments. Especially in the harsh marine atmospheric environment, under the combined action of mechanical loads such as tension and bending and harsh service environment factors such as high temperature, high salt, and high irradiation, the problem of stress corrosion failure is prominent. Designing a simple and efficient stress fixture for composite materials to carry out natural environment exposure tests of composite materials under mechanical loads and accumulate their marine environment effect data can provide data support for the design and material selection of related equipment, and is of great significance for the popularization and application of new composite materials.

[0003] Patent document

CN 113418772 A

[0004] Patent document

CN 104749029 B

[0005] To overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a stress loading device for batch stress corrosion tests of composite materials. This device can simultaneously apply tensile and bending mechanical loads to composite material specimens, and multiple groups of composite material specimens can be loaded at the same time, realizing batch natural environment tests of composite materials under mechanical load. Summary of the Invention

[0006] (I) Technical Problems to be Solved

[0007] The object of the present invention is to provide a stress loading device for batch stress corrosion tests of composite materials to solve the defect that the existing stress loading devices can only load one specimen for testing. (II) Summary of the Invention

[0009] To solve the above technical problems, the present invention provides the following technical solution: A stress loading device for batch stress corrosion tests of composite materials, including a base, a column, a pressing plate, a support, a rotating block, a specimen chuck, a screw rod, a threaded through hole, and a groove. The top end of the base is fixedly connected to the column, the top end of the column is fixedly connected to the pressing plate, and a threaded through hole corresponding to the screw rod is provided on the base.

[0010] Preferably, one end of the screw rod is fixedly connected to the rotating block.

[0011] Preferably, the other end of the screw rod is located in the groove provided on the pressing plate.

[0012] Preferably, multiple groups of supports are fixedly installed in parallel on the side of the pressing plate close to the base, and specimen chucks are fixedly installed at the corresponding height positions of each group of supports.

[0013] Preferably, a specimen is clamped on the specimen chuck.

[0014] (III) Beneficial effects

[0015] A stress loading device for batch stress corrosion tests of composite materials provided by the present invention has the following advantages: the invention has a simple structure, is easy to install and disassemble, and is convenient to operate; without occupying a mechanical testing machine and without the need for electronic equipment, by screwing in the screw to bend the pressing plate, it can accurately achieve the simultaneous loading of bending and tensile stresses of the composite material specimen between the pressing plate supports, truly simulating its mechanical load state; the design of multiple groups of parallel supports can achieve the mechanical loading of multiple composite material specimens at the same time; this device provides conditions for the batch environmental exposure test of composite material specimens under a simulated mechanical load state, and has a wide application prospect. Description of the drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a front view sectional structure schematic diagram of the present invention;

[0018] Figure 2 It is a side view sectional structure schematic diagram of the present invention.

[0019] In the figure: 1, base; 2, column; 3, pressing plate; 4, support; 5, rotating block; 6, specimen chuck; 7, screw; 8, threaded through hole; 9, groove. Specific embodiments

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Please refer to Figure 1-2 , an embodiment provided by the present invention: A stress loading device for batch stress corrosion test of composite materials, including a base 1, a column 2, a pressing plate 3, a support 4, a rotating block 5, a specimen chuck 6, a screw 7, a threaded through hole 8, and a groove 9. The top of the base 1 is fixedly connected to the column 2. The base 1 and the column 2 are made of high-strength low-alloy steel. The base 1 is rectangular with a thickness of 8 mm, and the column 2 is a φ8 mm cylinder, respectively close to the center positions of the two long sides of the base 1. The two are integrally formed by welding; the top of the column 2 is fixedly connected to the pressing plate 3. The pressing plate 3 is made of spring steel with high tensile strength and elastic limit, rectangular, with a thickness of 2 mm, and is connected to the column 2 by welding technology, and can apply a large load without permanent deformation; the thickness of the base 1 is more than twice that of the pressing plate 3. When applying stress, no obvious deformation will occur. At the same time, a threaded through hole 8 corresponding to the screw 7 is opened on the base 1. The screw 7 is located at both ends of the base 1 and the pressing plate 3 to ensure uniform deformation of the pressing plate 3; as an improvement of the present invention, multiple groups of screws 7 can be arranged in parallel, located at both ends of the base 1 and the pressing plate 3, and evenly spaced, further ensuring the uniformity of the deformation of the pressing plate 3. At the same time, an angle disc can be installed on the outer surface of the base 1 around the screw 7 to record the rotation angle. By controlling the rotation angle and combining the pitch of the screw 7, the rotation distance can be accurately calculated to ensure the accuracy of the applied pressure and deformation. The threaded through holes 8 can be opened at different positions on the pressing plate 3 and the bottom of the base 1, and a pair of bases 1 can be fixed at different positions on the same straight line through the screw 7; or a sliding groove can be used to change the distance between the bases 1 by clamping at different positions. One end of the screw 7 is fixedly connected to the rotating block 5, and the other end of the screw 7 is located in the groove 9 opened on the pressing plate 3. Multiple groups of supports 4 are fixedly installed in parallel on the side of the pressing plate 3 close to the base 1. As an improvement of the present invention, the relative distance of each group of supports 4 on the pressing plate 3 is adjustable. At the same time, a specimen chuck 6 is fixedly installed at the corresponding height position of each group of supports 4, and a specimen is clamped on the specimen chuck 6; as an improvement of the present invention, multiple specimen chucks 6 are installed on the supports 4, parallelly distributed at different heights of each group of supports 4. When the pressing plate 3 deforms, due to the different outward expansion distances at different height positions of the supports 4, different magnitudes of stress can be applied to the composite material specimens at the same time;

[0023] Specifically, when not in use, the screw 7 reaches into the groove 9 through the threaded through-hole 8 without applying pressure, making the pressing plate 3 and the base 1 in a parallel state; when in use, a plurality of composite material specimens are fixedly clamped in parallel between the two supports 4 through the specimen chuck 6 on the support 4. At the same time, the screw 7 is screwed in to apply pressure to the pressing plate 3 to cause it to bend outward, driving the support 4 on the pressing plate 3 to expand outward, and simultaneously applying bending and tensile stresses to the specimen. That is, both ends of the specimen are fixed to the specimen chuck 6, and while bending with the pressing plate 3, due to the increased distance between the upper parts of the base 1, a tensile stress is simultaneously formed on the specimen.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stress loading device for batch stress corrosion tests of composite materials, comprising a base (1), a column (2), a pressing plate (3), a support (4), a rotating block (5), a specimen chuck (6), a screw (7), a threaded through hole (8) and a groove (9), characterized in that: The top end of the base (1) is fixedly connected with a column (2), the top end of the column (2) is fixedly connected with a pressing plate (3), and at the same time, a threaded through hole (8) corresponding to the screw rod (7) is formed in the base (1); On the side of the pressing plate (3) close to the base (1), a plurality of groups of supports (4) are fixedly installed in parallel, and at the same time, a specimen chuck (6) is fixedly installed at the corresponding height position of each group of supports (4); The other end of the screw rod (7) is located in a groove (9) formed in the pressing plate (3); A specimen is clamped on the specimen chuck (6); During use, the screw rod (7) is screwed in to apply pressure to the pressing plate (3) to make it bend and deform outwards, driving the supports (4) on the pressing plate (3) to expand outwards, and simultaneously applying bending and tensile stresses to the specimen.

2. The stress loading device for batch stress corrosion test of composite materials according to claim 1, characterized in that: One end of the screw rod (7) is fixedly connected with a rotating block (5).

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