Universal elastic modulus detection platform

Abstract

The utility model discloses a universal elasticity modulus detection platform, the platform is composed of an upper platform, a lower platform and a shock absorption layer between the upper platform and the lower platform, the upper platform is composed of a working plane, a receiver guide rail and a tool groove, soft silica gel or plastic materials are laid on the working plane, and a sample is softly supported on the working plane during testing. According to the method, the requirement for a testing method in the standard can be met, the testing requirements of large samples and special-shaped samples which cannot determine node positions can be met, meanwhile, the problem that small samples shift in the testing process is solved, the samples can be directly placed on a testing platform in the testing process, operation can be conducted, and testing steps are simplified; the receiver guide rail is arranged on the test platform, the damping layer is arranged between the upper platform and the lower platform, and the supporting legs with the damping pads are arranged between the lower platform and the equipment placing platform, so that the influence of environmental vibration on a test result is reduced to the greatest extent, and measurement errors caused by environmental factors are avoided.

Description

Technical Field

[0001] This utility model relates to a pulse-excitation method for testing elastic modulus, and in particular to a general-purpose testing platform for elastic modulus. Background Technology

[0002] Elastic modulus is an important mechanical property of materials. In the field of solid materials, the elastic modulus is often tested using the pulse excitation method. This method involves applying a certain force to the sample through a striking device to excite the sample to vibrate, and then collecting the natural frequencies during the vibration process to calculate the elastic modulus. During the test, the sample should be in a free vibration state to minimize the influence of environmental factors on the sample vibration. The national standard GB / T 30758, "Dynamic Young's Modulus Test Method for Refractory Materials (Pulse Excitation Method)," stipulates that to allow the sample to vibrate freely, two types of sample support methods can be used during the test: rigid support and soft support. Rigid support is generally located at a distance of 0.224L from both ends of the sample, while soft support generally involves placing the entire sample on a soft support pad. The purpose of both support devices is to eliminate the influence of the external environment on the sample vibration during the test.

[0003] Existing testing equipment mostly uses rigid support devices, with the support position at 0.224L from both ends of the specimen, i.e., the node position of the specimen. During the vibration of the specimen, the amplitude at the node position is zero, so support at this position will not affect the vibration of the specimen. For example, patents CN 101696958B and CN 201522401U both use support blocks or support lines to form a three-point support, with the support position located at 0.224L from both ends of the specimen. However, this support method is suitable for testing regular rectangular specimens. For large-sized or irregularly shaped specimens, the variation or irregularity of the specimen size makes it impossible to determine the node of the specimen. In this case, rigid support no longer meets the testing requirements of the specimen. For small-sized specimens, when using rigid support, the specimen is prone to displacement during the tapping process, which affects the specimen results. Utility Model Content

[0004] To overcome the problem that rigid support methods cannot meet the requirements of pulse excitation method for elastic modulus testing of large, irregularly shaped, and small specimens, the purpose of this utility model is to propose a universal elastic modulus testing platform.

[0005] The objective of this utility model can be achieved using the following technical solutions:

[0006] A general-purpose elastic modulus testing platform is disclosed, comprising an upper platform and a lower platform. Both the upper and lower platforms are rectangular structures, with the upper platform being smaller than the lower platform. A damping layer is bonded to the upper surface of the lower platform, and the upper platform is bonded to the damping layer. The upper platform consists of a working plane, a receiver guide rail, and a tool slot. The working plane, located at the center of the upper platform, is a rectangular area covered with soft silicone or plastic material. A positioning scale for the sample is provided on the long side of the working plane facing the operator. The receiver guide rail is I-shaped, with a groove at the bottom of the receiver bracket matching it. The receiver bracket can slide along the guide rail to meet the requirements of different receiving positions in the testing of large or irregularly shaped samples. The tool slot, located on the right side of the working plane, is a recessed rectangular area, facilitating the placement of the test sample or testing tools.

[0007] The upper platform and the shock-absorbing layer, and the shock-absorbing layer and the lower platform are connected by flexible adhesive; the bottom of the lower platform is equipped with support legs with shock-absorbing pads.

[0008] The shock-absorbing layer is made of soft silicone or plastic. Its upper and lower surfaces are connected to the lower part of the upper platform and the upper part of the lower platform respectively by flexible adhesive. The shock-absorbing layer can also be replaced by rigid springs installed at the four corners.

[0009] The upper part of the lower platform is the area for bonding the shock-absorbing layer, and the lower part is equipped with support legs with shock-absorbing pads. The lower platform provides an appropriate height for testing operations.

[0010] The shock-absorbing pads on the outriggers are made of soft silicone or plastic, or other materials with shock-absorbing functions.

[0011] The general-purpose elastic modulus testing platform proposed in this utility model, adopting the above-mentioned technical solution, has the following beneficial effects:

[0012] 1. The sample support platform is a soft support, which can meet the requirements of the test method in the standard, as well as the testing requirements of large and irregularly shaped samples where the node position cannot be determined. At the same time, it solves the problem of small samples shifting during the test. The test can be carried out by simply placing the sample on the test platform, which simplifies the test procedure.

[0013] 2. A receiver rail is installed on the test platform to meet the signal reception requirements of different parts during the testing of large or irregularly shaped samples; a shock-absorbing layer is installed between the upper and lower platforms, and support legs with shock-absorbing pads are installed between the lower platform and the equipment placement platform to minimize the impact of environmental vibration on the test results and avoid measurement errors caused by environmental factors. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] In the diagram, 1. Upper platform, 2. Receiver bracket, 3. Receiver guide rail, 4. Working plane, 5. Tool slot, 6. Ruler, 7. Shock-absorbing layer, 8. Lower platform, 9. Support leg. Detailed Implementation

[0016] This utility model will be described in detail with reference to the accompanying drawings and specific embodiments:

[0017] like Figure 1 As shown: A general-purpose elastic modulus testing platform includes an upper platform 1, a receiver bracket 2, a receiver guide rail 3, a working plane 4, a tool slot 5, a scale 6, a shock-absorbing layer 7, a lower platform 8, and support legs 9. The upper platform 1 and the lower platform 8 are connected to the shock-absorbing layer 7 by flexible adhesive. The bottom of the lower platform 8 is equipped with support legs 9 with shock-absorbing pads. The shock-absorbing layer 7 and the support legs 9 with shock-absorbing pads can reduce the impact of environmental vibration on the test.

[0018] Based on the above, the upper platform 1 consists of a working plane 4, a receiver guide rail 3, and a tool slot 5. The working plane 4 is located at the center of the upper platform 1 and is a rectangular area covered with soft silicone or plastic material. A scale 6 is set on the long side of the working plane 4 on the operator's side for sample positioning. The receiver guide rail 3 is I-shaped, and the bottom groove of the receiver bracket 2 matches it. The receiver bracket 2 can slide along the receiver guide rail 3 to meet the requirements of different receiving parts in the testing of large or irregularly shaped samples. The tool slot 5 is located on the right side of the working plane 4 and is a recessed rectangular area to facilitate the placement of the test sample or testing tools.

[0019] Based on the above, the shock-absorbing layer 7 is made of soft silicone or plastic. Its upper and lower surfaces are connected to the lower part of the upper platform 1 and the upper part of the lower platform 8 respectively by flexible adhesive. The shock-absorbing layer 7 can also be replaced by rigid springs installed at the four corners.

[0020] Based on the above, the upper part of the lower platform 8 is the bonding area of ​​the shock-absorbing layer 7, and the lower part is equipped with support legs 9 with shock-absorbing pads. The lower platform 8 provides an appropriate height for testing operations.

[0021] Based on the above, the support leg 9 with shock-absorbing pads has shock-absorbing pads made of soft silicone or plastic, or other materials with shock-absorbing functions.

Claims

1. A general-purpose elastic modulus testing platform, characterized in that: The elastic modulus testing platform has an upper platform and a lower platform; both the upper and lower platforms are rectangular structures, with the upper platform being smaller than the lower platform; a damping layer is bonded to the upper surface of the lower platform; the upper platform is bonded to the damping layer; the upper platform consists of a working plane, a receiver guide rail, and a tool slot; the working plane is located at the center of the upper platform and is a rectangular area covered with soft silicone or plastic material; a positioning scale for the sample is set on the long side of the working plane on the operator's side; the receiver guide rail is I-shaped, with a groove at the bottom of the receiver bracket matching it, allowing the receiver bracket to slide along the guide rail to meet the requirements of different receiving parts in the testing of large or irregularly shaped samples; the tool slot is located on the right side of the working plane and is a recessed rectangular area, facilitating the placement of the test sample or testing tools.

2. The universal elastic modulus testing platform as described in claim 1, characterized in that: The upper platform and the shock-absorbing layer, and the shock-absorbing layer and the lower platform are connected by flexible adhesive; the bottom of the lower platform is equipped with support legs with shock-absorbing pads.

3. The universal elastic modulus testing platform as described in claim 1, characterized in that: The shock-absorbing layer is made of soft silicone or plastic. Its upper and lower surfaces are connected to the lower part of the upper platform and the upper part of the lower platform respectively by flexible adhesive. The shock-absorbing layer is replaced by rigid springs installed at the four corners.

4. The universal elastic modulus testing platform as described in claim 1, characterized in that: The upper part of the lower platform is the area for bonding the shock-absorbing layer, and the lower part is equipped with support legs with shock-absorbing pads. The lower platform provides an appropriate height for testing operations.

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