CN-121977943-A - Simulated ice bending strength testing device and testing method thereof

CN121977943ACN 121977943 ACN121977943 ACN 121977943ACN-121977943-A

Abstract

The invention relates to the technical field of ice mechanics tests, in particular to a simulated ice bending strength testing device and a testing method thereof. The loading assembly is arranged on the frame and used for applying load to the free end of the model ice beam, and comprises a loading head, wherein the loading head is arranged along the Y-axis direction, and the dimension of the loading head along the Y-axis direction is matched with the width dimension of the model ice beam, so that the load applied by the loading head vertically passes through the central shaft of the clamped model ice beam, and the additional torque or axial force caused by eccentric loading is avoided, thereby realizing simulation of a pure bending stress state. The testing device solves the technical problem that the measurement is inaccurate due to the fact that accurate loading load is difficult to realize in the bending strength test of the brittle materials such as model ice.

Inventors

ZHANG HUIBO
WANG ZHENNAN
Zhu Xinzhe
ZHANG YUBO
LI GUANGHUA
FU BENSHUAI
XU JIANAN

Assignees

哈尔滨工程大学

Dates

Publication Date: 20260505
Application Date: 20260310

Claims (10)

1. A simulated ice bending strength testing device, comprising: A frame (5); The fastening assembly (1), the fastening assembly (1) is installed on the frame (5), the fastening assembly (1) is used for clamping the model ice beam (2), and the model ice beam (2) is arranged along the X-axis direction; The loading assembly (3), the loading assembly (3) install in frame (5), the loading assembly (3) is including being used for applys loading head (38) along Z axle direction load to model ice roof beam (2) free end, loading head (38) are along Y axle direction setting, and its along Y axle direction size with the width size looks adaptation of model ice roof beam (2).
2. A simulated ice bending strength testing apparatus as claimed in claim 1, wherein said loading assembly (3) further comprises a loading mechanism and a rotation mechanism (37), said loading mechanism comprising a loading shaft (35) arranged along the Z-axis direction, said rotation mechanism (37) being provided between said loading shaft (35) and said loading head (38), said loading shaft (35) being connected to said loading head (38) by said rotation mechanism (37) to drive said loading head (38) to move along the Z-axis direction, said rotation mechanism (37) being rotatable about the axis of said loading shaft (35).
3. A simulated ice bending strength testing apparatus as claimed in claim 2, wherein said loading assembly (3) further comprises a pressure sensor (36) located between said loading shaft (35) and said rotary mechanism (37), said pressure sensor (36) being connected to said loading shaft (35) in the Z-axis direction, said rotary mechanism (37) being connected to said loading head (38) and said pressure sensor (36) in the Z-axis direction.
4. A simulated ice bending strength testing device as claimed in claim 2, wherein the loading mechanism comprises a drive motor (31), a decelerator (32) and a loading cylinder (33), the drive motor (31) being connected to an input of the decelerator (32), the loading cylinder (33) being connected to an output of the decelerator (32).
5. A simulated ice bending strength testing apparatus as claimed in any one of claims 1-4, comprising a movement adjustment assembly (4) mounted to said housing (5), said housing (5) being provided with a sliding space through which said loading assembly (3) passes, said movement adjustment assembly (4) being connected to said loading assembly (3) to drive said loading assembly (3) to move within said sliding space.
6. The simulated ice bending strength testing device as claimed in claim 5, wherein the movement adjusting assembly (4) comprises a sliding mechanism and a screw mechanism, at least one group of sliding mechanisms are arranged on the frame (5) and are positioned outside the sliding space, the sliding mechanism comprises a sliding block (410) and a sliding rail (48) extending along the arrangement direction of the model ice beam (2), the sliding block (410) is in sliding fit with the sliding rail (48), and the screw mechanism is arranged on one side of the sliding rail (48) and is connected with the sliding block (410) to drive the sliding block (410) to slide along the sliding rail (48).
7. A simulated ice bending strength testing apparatus as claimed in claim 6, wherein said movement adjustment assembly (4) further comprises: The displacement adjusting plate (47), a through hole for the loading assembly (3) to pass through is formed in the displacement adjusting plate (47), the loading assembly (3) passes through the through hole and is connected with the displacement adjusting plate (47), and the displacement adjusting plate (47) is connected with the sliding block (410); a scale (49), wherein the scale (49) is installed on the frame (5) and is arranged along the sliding direction of the sliding mechanism; and a pointer (411), wherein the pointer (411) is mounted on the side wall of the displacement adjusting plate (47) or the sliding block (410), and is arranged corresponding to the scale (49).
8. A simulated ice bending strength testing apparatus as claimed in claim 7, wherein the frame (5) comprises a support frame (57) and a support table (56) horizontally disposed on the support frame (57).
9. A simulated ice bending strength testing device as claimed in claim 8, wherein said fastening assembly (1) comprises: A support frame (54) provided on the support table (56); An upper supporting plate (51) and a lower supporting plate (53), which are both arranged in parallel with the supporting frame (54), wherein the upper supporting plate (51) is positioned above the lower supporting plate (53), and a space for accommodating the model ice beam (2) is formed between the upper supporting plate and the lower supporting plate; An optical axis (15) arranged between the upper support plate (51) and the lower support plate (53) along the vertical direction; A fastening plate (17) located between the upper support plate (51) and the lower support plate (53) and slidably connected to the optical axis (15); A fastening adjusting screw (12) penetrating the upper support plate (51) in a vertical direction and being screwed with the upper support plate (51) while being connected with the fastening flat plate (17); And the limiting blocks (18) are arranged on the lower supporting plate (53), are distributed horizontally and longitudinally and horizontally and are used for being matched with the fastening flat plate (17) and the lower supporting plate (53) in a coordinated manner so as to clamp and fix one end of the model ice beam (2).
10. A testing method, characterized in that it is based on a simulated ice bending strength testing device according to any one of claims 1 to 9, comprising: S1, measuring the width b and the thickness h of the prepared model ice beam (2), repeatedly measuring at least three times, and taking the average value as a size value; s2, tightly pressing and fixing one end of the model ice beam (2) through a fastening assembly (1) of the testing device; S3, adjusting the position of the loading head (38) to enable the loading head (38) to contact a preset loading point at the free end of the model ice beam (2), and measuring and recording the distance l from the loading point to the fixed end; s4, starting a loading mechanism, enabling the loading head (38) to apply load to the model ice beam (2) at a constant speed, and synchronously collecting load data output by the pressure sensor (36); s5, stopping loading when the model ice beam (2) is damaged, and taking out the damaged model ice beam (2); S6, repeating the steps S1 to S5, and carrying out multiple groups of repeated tests on the model ice beams (2) with the same specification; S7, removing the maximum value and the minimum value from load peaks obtained from a plurality of groups of tests, and taking the average value of the residual load peaks as a load peak F for calculation; S8, substituting the load peak value F, the distance l, the width b and the thickness h into the following formula: Calculated out the bending strength 。

Description

Simulated ice bending strength testing device and testing method thereof Technical Field The invention relates to the technical field of ice mechanics tests, in particular to a simulated ice bending strength testing device and a testing method thereof. Background Sea ice is mainly characterized by bending damage in the crushing process, so that the bending strength is one of key indexes for evaluating the mechanical similarity of model ice and sea ice. At present, a cantilever beam method is often adopted in a laboratory to measure the bending strength of model ice, and the bending strength is calculated by fixing one end of the model ice beam and applying load on the free end until the model ice beam is broken. When the existing bending strength testing device is used for carrying out a model ice beam bending test, the measured breaking load data has larger discreteness even if the model ice beam bending test is loaded at a constant speed, and the fluctuation of the strength calculation results of the same batch of samples is remarkable. Disclosure of Invention The invention solves the problem of improving the accuracy of measuring the bending strength of the model ice by the existing cantilever beam method. In order to solve the problems, the invention provides a simulated ice bending strength testing device and a testing method thereof. A simulated ice bending strength testing device comprising: A frame; the fastening component is arranged on the frame and used for clamping the model ice beam, and the model ice beam is arranged along the X-axis direction; The loading assembly is installed in the frame, the loading assembly comprises a loading head used for applying load along the Z-axis direction to the free end of the model ice beam, the loading head is arranged along the Y-axis direction, and the dimension of the loading head along the Y-axis direction is matched with the width dimension of the model ice beam. Preferably, the loading assembly further comprises a loading mechanism and a rotating mechanism, the loading mechanism comprises a loading shaft arranged along the Z-axis direction, the rotating mechanism is arranged between the loading shaft and the loading head, the loading shaft is connected with the loading head through the rotating mechanism so as to drive the loading head to move along the Z-axis direction, and the rotating mechanism can rotate around the axis center of the loading shaft. Preferably, the loading assembly further comprises a pressure sensor located between the loading shaft and the rotating mechanism, the pressure sensor is connected with the loading shaft along the Z-axis direction, and the rotating mechanism is connected with the loading head and the pressure sensor along the Z-axis direction. Preferably, the loading mechanism comprises a driving motor, a speed reducer and a loading cylinder, wherein the driving motor is connected with the input end of the speed reducer, and the loading cylinder is connected with the output end of the speed reducer. Preferably, the device comprises a movement adjusting component arranged on the frame, wherein a sliding space for the loading component to pass through is formed in the frame, and the movement adjusting component is connected with the loading component to drive the loading component to move in the sliding space. Preferably, the movement adjusting assembly comprises a sliding mechanism and a screw mechanism, wherein at least one group of sliding mechanisms are arranged on the frame and are positioned outside the sliding space, each sliding mechanism comprises a sliding block and a sliding rail extending along the setting direction of the model ice beam, the sliding blocks are in sliding fit with the sliding rails, and the screw mechanism is arranged on one side of each sliding rail and is connected with the sliding blocks to drive the sliding blocks to slide along the sliding rails. Preferably, the movement adjustment assembly further comprises: The displacement adjusting plate is provided with a through hole for a loading assembly to pass through, the loading assembly passes through the through hole and is connected with the displacement adjusting plate, and the displacement adjusting plate is connected with the sliding block; The scale is arranged on the frame and is arranged along the sliding direction of the sliding mechanism; The pointer is arranged on the side wall of the displacement adjusting plate or the side wall of the sliding block and is arranged corresponding to the scale. Preferably, the frame comprises a support frame and a support table horizontally arranged on the support frame. Preferably, the fastening assembly comprises: The support frame is arranged on the support table; The upper supporting plate and the lower supporting plate are arranged in parallel with the supporting frame, and the upper supporting plate is positioned above the lower supporting plate, and a space for accommodating the model ice beam i