A method for determining the cushioning performance of cushioning material

Abstract

The present invention discloses a method for determining the buffering performance of a buffer material, which belongs to the technical field of calculating the buffering parameters of buffer materials. The method comprises the following steps: determining a value range of the unit volume deformation energy of the buffer material; selecting n unit volume deformation energies within the value range; determining a set of test data for each unit volume deformation energy to obtain n sets of test data, each set of test data including static stress, the drop height of a mass block, and the thickness of the buffer material; performing a drop test based on each set of test data, and collecting the peak acceleration of the mass block during the test to obtain multiple sets of peak accelerations; determining multiple sets of dynamic stresses based on the multiple peak accelerations; and performing exponential function fitting on the multiple sets of dynamic stresses and the n unit volume deformation energies to obtain the buffering performance of the buffer material. The present invention can improve the efficiency of determining the buffering performance of the buffer material, saving time and effort.

Description

Technical Field

[0001] The present invention relates to the technical field of calculation of buffer parameters of buffer materials, and in particular to a method for determining the buffer performance of a buffer material. Background Art

[0002] During the transportation and delivery of data center products (servers, switches, cabinets, etc.), cushioning materials are usually used to package data center products. Cushioning packaging plays a role in protecting data center products from vibration and impact hazards during transportation and loading and unloading.

[0003] Currently, closed-cell foam plastics, such as expanded polyethylene (EPE), expanded polystyrene (EPS), and expanded polypropylene (EPP), are widely used as cushioning materials in data center products. EPE is the most commonly used. Using the relationship between dynamic stress and deformation energy per unit volume as a method to describe the cushioning performance of a cushioning material based on the dynamic drop mechanics can greatly simplify testing. However, existing techniques require over a hundred tests to determine the relationship between dynamic stress and deformation energy per unit volume, which is inefficient, time-consuming, and labor-intensive. Summary of the Invention

[0004] The object of the present invention is to provide a method for determining the cushioning performance of a cushioning material, which can improve the efficiency of determining the cushioning performance of the cushioning material and save time and effort.

[0005] As conceived above, the technical solution adopted by the present invention is:

[0006] A method for determining the cushioning performance of a cushioning material comprises the following steps:

[0007] Determine the value range of the unit volume deformation energy of the cushioning material;

[0008] Select n unit volume deformation energies within the value range;

[0009] For each unit volume deformation energy, determine a set of test data to obtain n sets of test data, each set of test data including static stress, drop height of the mass block, and thickness of the buffer material;

[0010] Performing a drop test according to each set of test data, and collecting peak accelerations of the mass block during the test to obtain multiple sets of peak accelerations;

[0011] determining a plurality of sets of dynamic stresses based on a plurality of the peak accelerations;

[0012] The buffering performance of the buffer material is obtained by fitting exponential functions to multiple sets of dynamic stresses and n unit volume deformation energies.

[0013] Optionally, performing exponential function fitting on multiple sets of dynamic stresses and n unit volume deformation energies to obtain the cushioning performance of the cushioning material comprises the following steps:

[0014] During the test, the acceleration of the mass block is collected at each moment, and a curve showing the relationship between acceleration and time is obtained;

[0015] According to the relationship curve between acceleration and time, a linear relationship between the correction parameter and the thickness of the buffer material is obtained;

[0016] Correcting the first relationship according to the linear relationship to obtain a corrected first relationship, wherein the first relationship is a relationship between unit volume deformation energy and static stress, a drop height of the mass block, a cushioning material, and a correction parameter;

[0017] Determine n corrected unit volume deformation energies according to the corrected first relationship;

[0018] The buffering performance of the buffer material is obtained by fitting multiple sets of dynamic stresses with n corrected unit volume deformation energies through exponential functions.

[0019] Optionally, the first relational expression is Among them, E t represents the deformation energy per unit volume, S represents the static stress, H represents the drop height of the mass block, δ represents the correction parameter, and T represents the thickness of the buffer material.

[0020] Optionally, for each unit volume deformation energy, determining a set of test data includes:

[0021] A set of test data is determined for each unit volume deformation energy and the first relationship, and the correction coefficient δ is related to the thickness of the buffer material.

[0022] Optionally, the linear relationship between the correction parameter and the thickness of the buffer material is δ=a1×T+b1, wherein δ represents the correction parameter, a1 and b1 are constants, and T represents the thickness of the buffer material.

[0023] Optionally, the formula for fitting multiple sets of dynamic stresses and n corrected unit volume deformations is: Among them, S d represents dynamic stress, a2, b2, c are constants, E t It represents the deformation energy per unit volume.

[0024] Optionally, selecting n unit volume deformation energies within the value range includes: selecting n unit volume deformation energies at equal intervals within the value range.

[0025] Optionally, when determining a set of test data for each unit volume deformation energy, the thicknesses of the n buffer materials gradually increase or decrease.

[0026] Optionally, determining multiple sets of dynamic stresses based on multiple sets of peak accelerations includes: d =a max ×S to calculate dynamic stress, where S d represents dynamic stress, a max represents the peak acceleration, S represents the static stress, and W represents the weight of the mass block, and A represents the buffer area.

[0027] Optionally, the following steps are also included:

[0028] Specify the drop height of the mass block and the thickness of the cushioning material;

[0029] Select multiple static stresses within the static stress value range;

[0030] Obtaining a dynamic stress corresponding to each static stress according to the plurality of static stresses, the buffering performance of the buffer material, and a specified drop height of the mass block and the thickness of the buffer material;

[0031] Obtaining a plurality of peak accelerations according to the plurality of dynamic stresses, wherein the plurality of static stresses correspond one to one with the plurality of peak accelerations;

[0032] A GP curve of the buffer material is drawn according to the multiple static stresses and the multiple peak accelerations.

[0033] The present invention has at least the following beneficial effects:

[0034] The method for determining the buffering performance of a buffering material provided by the present invention selects a finite number of unit volume deformation energies within the value range of the unit volume deformation energy, then determines multiple groups of test data based on the multiple unit volume deformation energies, and then performs a drop test on the multiple groups of test data to obtain peak acceleration, and obtains multiple groups of dynamic stresses based on the relationship between the peak acceleration and the dynamic stress, fits the dynamic stress with the selected unit volume deformation energy to obtain an exponential function relationship between the two, and then obtains the buffering performance of the buffering material. The buffering performance of the buffering material is obtained by actual testing and function fitting, which can reduce the number of tests while ensuring accuracy, thereby improving the efficiency of determining the buffering performance of the buffering material and saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is the first process of the method for determining the cushioning performance of a cushioning material provided by an embodiment of the present invention;

[0036] Figure 2is a flow chart for determining multiple sets of dynamic stresses based on multiple peak accelerations provided by an embodiment of the present invention;

[0037] Figure 3 is a curve showing the relationship between acceleration and time provided by an embodiment of the present invention;

[0038] Figure 4 This is the second process of the method for determining the cushioning performance of the cushioning material provided by the embodiment of the present invention. DETAILED DESCRIPTION

[0039] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the drawings only show portions relevant to the present invention, not all of them.

[0040] This embodiment provides a method for determining the cushioning performance of a cushioning material, which can improve the efficiency of determining the cushioning performance of the cushioning material and save time and effort.

[0041] like Figure 1 As shown, the method for determining the cushioning performance of the cushioning material includes the following steps:

[0042] S1. Determine the range of deformation energy per unit volume of the cushioning material.

[0043] The unit volume deformation energy of a cushioning material is related to the type of cushioning material, the application scenario, and the weight and size of the object being handled. Alternatively, the range of unit volume deformation energy can be calculated based on relevant parameters, as explained in detail later in this article. For example, using a foamed polypropylene packaging server as an example, the unit volume deformation energy ranges from 1 to 42. It should be noted that the unit of unit volume deformation energy is PSI or Pa.

[0044] Optionally, before performing step S1, the method for determining the cushioning performance of the cushioning material further includes unifying the units of various parameters for ease of calculation. For example, in this embodiment, the unit of unit volume deformation energy is PSI, and the corresponding unit of length is inch.

[0045] S2. Select n unit volume deformation energies within the range of unit volume deformation energies of the cushioning material.

[0046] After obtaining the range of values ​​for the unit volume deformation energy of the cushioning material, n unit volume deformation energies are selected within this range. Optionally, the unit volume deformation energy can be an integer or a non-integer, which is not limited in this embodiment. For ease of calculation, the unit volume deformation energy is an integer. n is a positive integer, and the value of n is selected to ensure the accuracy of the fitting result and reduce the amount of calculation. Optionally, n ≥ 5, preferably, n = 5.

[0047] Optionally, n unit volume deformation energies are selected at equal intervals within the range of the unit volume deformation energy of the cushioning material to provide representativeness. For example, when the unit volume deformation energy ranges from 1 to 42 PSI, the n unit volume deformation energies may be 1 PSI, 10 PSI, 20 PSI, 30 PSI, and 42 PSI, respectively.

[0048] S3. For each unit volume deformation energy, determine a set of test data to obtain n sets of test data, each set of test data including static stress, drop height of the mass block, and thickness of the buffer material.

[0049] The unit volume deformation energy is related to the static stress, the drop height of the mass block, and the thickness of the cushioning material. Once the unit volume deformation energy is determined, the corresponding static stress, drop height, and cushioning material thickness can be determined. For example, when the unit volume deformation energy is 20 PSI, the test data corresponding to this unit volume deformation energy may be: static stress of 2.9 PSI; drop height of the mass block of 42 inches; cushioning material thickness of 3 inches. For these five unit volume deformation energies, five sets of test data can be obtained.

[0050] For example, different materials correspond to different static stress ranges, different mass drop height ranges, and different cushioning material thickness ranges. For example, for expanded polypropylene, the static stress range is 0.5 to 4.4 PSI, the mass drop height range is 12 to 42 inches, and the thickness range is 2 to 4 inches.

[0051] Optionally, when selecting test data, the change of a certain parameter can be used as the main focus. For example, the change of the thickness of the buffer material can be used as the main focus. The thickness of the buffer material can be selected in a gradient, that is, the thickness of n buffer materials gradually increases or decreases, so as to test buffer materials of multiple thicknesses and ensure the accuracy and representativeness of the test results. For example, when 5 thickness values ​​are taken between 2 and 4 inches, the 5 thickness values ​​can be 2 inches, 2.5 inches, 3 inches, 3.5 inches and 4 inches respectively. Correspondingly, the falling heights of the mass blocks corresponding to the 5 thickness values ​​are preferably different and can have a certain gradient. The static stresses corresponding to the 5 thickness values ​​are also preferably different, so that the test data are dispersed and representative.

[0052] S4. Perform a drop test according to each set of test data, and collect the peak acceleration of the mass block during the test to obtain multiple sets of peak accelerations.

[0053] After executing step S3, n groups of test data are obtained. Next, a drop test is performed on each group of test data. Specifically, the drop test refers to controlling the mass block to fall from a preset height onto the buffer material. Specifically, the weight of the mass block and the buffer area of ​​the buffer material during the test are determined according to the static stress. The buffer area of ​​the buffer material can be the area of ​​the surface of the mass block in contact with the buffer material when it falls. Specifically, the area of ​​the surface of the mass block in contact with the buffer material when it falls is determined according to formula (1). In formula (1), W represents the weight of the mass block in kilograms, and A represents the buffer area in square meters.

[0054]

[0055] The thickness of the cushioning material is then set to the thickness specified in the test data. The mass block is then controlled to drop onto the cushioning material at the drop height specified in the test data. For example, a drop test can be performed using a drop weight tester, in which case the drop height of the mass block can be set directly on the drop weight tester.

[0056] In this embodiment, during the test, the mass block falls on the buffer material in a free fall motion, and the acceleration of the mass block can be collected by an acceleration acquisition device. The specific structure and acquisition principle of the acceleration acquisition device can be referred to the prior art. In this embodiment, an acceleration acquisition device can be installed on the drop weight tester to be able to directly collect the acceleration of the mass block. The acceleration data of the mass block when it is not in contact with the buffer material is not collected. After the mass block falls on the buffer material, the buffer material is compressed and deformed. The greater the degree of deformation, the higher the rebound force, and the higher the acceleration reflected. The maximum acceleration is the acceleration of the mass block at the moment when the buffer material is compressed to the limit. Afterwards, the buffer material gradually recovers, the rebound force decreases, and the acceleration gradually decreases. This maximum acceleration is the above-mentioned peak acceleration. Each time a test is performed, a peak acceleration can be obtained. After testing according to n groups of test data, n peak accelerations can be obtained.

[0057] Optionally, to ensure the accuracy of the test results, each set of test data may be tested repeatedly for multiple times, such as 3 to 5 times for each set of test data to obtain 3n to 5n sets of peak accelerations.

[0058] S5. Determine multiple groups of dynamic stresses based on the multiple peak accelerations.

[0059] The dynamic stress is related to the peak acceleration. After the peak acceleration is obtained, the dynamic stress of the mass block can be determined according to the peak acceleration. Alternatively, the dynamic stress can be calculated according to formula (2). Wherein, S in formula (2) d represents dynamic stress, a max represents the peak acceleration, S represents the static stress, and the calculation method of the static stress is shown in formula (1).

[0060] S d =a max ×S (2)

[0061] When there are multiple sets of peak accelerations, multiple sets of dynamic stresses can be obtained. For example, when there are 3n to 5n sets of peak accelerations, 3n to 5n sets of dynamic stresses can be obtained.

[0062] S6. Perform exponential function fitting on multiple sets of dynamic stresses and n unit volume deformation energies to obtain the cushioning performance of the cushioning material.

[0063] In this embodiment, the relationship between dynamic stress and unit volume deformation energy is defined as an exponential function relationship. Optionally, the relationship between the two can be expressed by formula (3). d represents dynamic stress, a2, b2, c are constants, E t It represents the deformation energy per unit volume.

[0064]

[0065] Each dynamic stress corresponds to a peak acceleration, each peak acceleration corresponds to a set of test data, and a set of test data corresponds to a unit volume deformation energy. Therefore, each dynamic stress corresponds to a unit volume deformation energy. Therefore, by substituting at least three corresponding sets of dynamic stresses and unit volume deformation energies into formula (3), the values ​​of a2, b2, and c can be obtained, and then the exponential function relationship between dynamic stress and unit volume deformation energy can be obtained, and the cushioning performance of the cushioning material can be obtained.

[0066] For example, in this embodiment, when the server is packaged with foamed polypropylene, formula (3) is specifically:

[0067] The method for determining the buffering performance of a buffering material provided in this embodiment selects a finite number of unit volume deformation energies within the value range of the unit volume deformation energy, and then determines multiple groups of test data based on the multiple unit volume deformation energies. Then, a drop test is performed on the multiple groups of test data to obtain peak acceleration, and multiple groups of dynamic stresses are obtained based on the relationship between the peak acceleration and the dynamic stress. The dynamic stress is fitted with the selected unit volume deformation energy to obtain an exponential function relationship between the two, and then the buffering performance of the buffering material is obtained. The buffering performance of the buffering material is obtained by actual testing and function fitting, which can reduce the number of tests while ensuring accuracy, thereby improving the efficiency of determining the buffering performance of the buffering material and saving time and effort.

[0068] Alternatively, as Figure 2 As shown, step S6 includes the following steps:

[0069] S61. During the test, the acceleration of the mass block is collected at each moment, and a curve showing the relationship between acceleration and time is obtained.

[0070] In step S61, the acceleration of the mass block at each moment is collected by the acceleration collection device, and the collected data is transmitted to the control module, which draws a curve of the relationship between acceleration and time. Figure 3 As shown in the figure, this embodiment provides a curve of acceleration versus time. The hatched portion represents the velocity increment during the rebound phase of the mass block, the thin solid line represents the acceleration response signal, and the thick solid line represents the acceleration signal during the rebound phase. The highest point of the curve corresponds to the peak acceleration. Integrating the hatched portion yields the velocity of the mass block after rebound. It should be noted that each drop test produces an acceleration versus time curve, allowing for multiple sets of post-rebound velocities.

[0071] S62. Obtain a linear relationship between the correction parameter and the thickness of the buffer material according to a curve of the relationship between acceleration and time.

[0072] Optionally, the relationship between the unit volume deformation energy and the velocity of the mass block after rebounding and the velocity of the mass block when contacting the buffer material is derived according to the following formula. The specific derivation is as follows:

[0073]

[0074] ATE t =mgH-mgH′ (5)

[0075]

[0076]

[0077] make

[0078]

[0079] get

[0080]

[0081] Among them, A represents the buffer area, T represents the thickness of the buffer material, E t represents the deformation energy per unit volume, m represents the weight of the mass block, H represents the falling height of the mass block, H' represents the rebound height of the mass block, δ represents the correction parameter, S represents the static stress, v represents the velocity of the mass block when it contacts the buffer material, v' represents the velocity of the mass block after rebound, and g represents the acceleration due to gravity.

[0082] Optionally, the velocity of the mass block after rebound can be calculated based on the relationship curve between acceleration and time. The velocity of the mass block when it contacts the buffer material is calculated from the drop height, that is, Then, according to the above formula (8), the correction parameters corresponding to different buffer thicknesses can be obtained.

[0083] After comparing a large amount of data, it is found that δ is not related to the drop height H or static stress S of the mass block, but is only related to the buffer thickness T of the buffer material. Therefore, a linear relationship between the correction parameter and the buffer thickness of the buffer material can be obtained. In this embodiment, the linear relationship between the correction parameter and the buffer thickness of the buffer material is shown in formula (10):

[0084] δ=a1×T+b1 (10)

[0085] Wherein, δ represents the correction parameter, a1 and b1 are constants, and T represents the thickness of the buffer material.

[0086] In this embodiment, δ can be obtained using formula (8), and T is determined in step S3. Therefore, the values ​​of a1 and b1 can be obtained by fitting multiple sets of data. In this embodiment, the fitting is performed using a fitting tool in Python, and Python automatically uses the least squares method for fitting. The specific fitting statements can be found in the prior art and are not described in detail in this embodiment. In this embodiment, when fitting foamed polypropylene with a density of 1.7 PCF, the obtained a1 and b1 are 0.0256 and 0.422, respectively.

[0087] It should be noted that, according to formula (8) in the derivation process, it can be seen that the unit volume deformation energy is also related to the first relationship. Therefore, in step S3, a set of test data is determined for each unit volume deformation energy and the first relationship, and the correction coefficient δ in the first relationship is related to the thickness of the buffer material.

[0088] S63. Correct the first relationship according to the linear relationship to obtain a corrected first relationship. The first relationship is a relationship between the unit volume deformation energy and the static stress, the drop height of the mass block, the buffer material, and the correction parameter.

[0089] After obtaining a linear relationship between the correction parameter and the cushioning thickness of the cushioning material, the first relationship is reversely corrected using this linear relationship. In this embodiment, the first relationship is Formula (9). Substituting Formula (10) into Formula (9) yields Formula (11) as shown below.

[0090]

[0091] S64. Determine n corrected unit volume deformation energies according to the corrected first relationship.

[0092] In step S2, the unit volume deformation energy is selected within the value range of the unit volume deformation energy of the buffer material. Taking into account the energy dissipation of the mass block during the rebound process, a more accurate unit volume deformation energy can be obtained according to formula (11). Therefore, after executing step S64, n corrected unit volume deformation energies can be obtained, and the corrected unit volume deformation energy can become the true unit volume deformation energy.

[0093] Step S65: performing exponential function fitting on the multiple sets of dynamic stresses and the n corrected unit volume deformation energies to obtain the cushioning performance of the cushioning material.

[0094] After obtaining n corrected unit volume deformation energies, in step S65, exponential function fitting is performed on multiple sets of dynamic stresses and the n corrected unit volume deformation energies to obtain formula (3), thereby obtaining the cushioning performance of the cushioning material.

[0095] The method for determining the buffering performance of the buffer material provided in this embodiment takes into account the energy loss after the mass block impacts the buffer material, and writes this part into the buffering performance formula. As shown in Formula (3) and Formula (10), a more reasonable fitting function is selected to make the fitting result more accurate.

[0096] Optionally, the method for determining the buffering performance of the buffering material provided in this embodiment can also obtain the GP curve of the buffering material, specifically, as follows Figure 4 As shown, the method for determining the cushioning performance of the cushioning material further includes the following steps:

[0097] S7. Specify the drop height of the mass block and the thickness of the cushioning material.

[0098] S8. Select multiple static stresses within the static stress value range.

[0099] For example, when the static stress ranges from 0.5 to 4 PSI, the value can be increased from 0.5 PSI to 4 PSI in steps of 0.1, thereby obtaining multiple static stresses.

[0100] S9, obtaining a dynamic stress corresponding to each static stress according to the plurality of static stresses, the buffering performance of the buffer material, and a specified drop height of the mass block and a thickness of the buffer material;

[0101] When the static stress, the drop height of the mass block, and the thickness of the buffer material are determined, the correction parameter value is selected. According to formula (9) and formula (3), multiple dynamic stresses can be obtained. The multiple dynamic stresses correspond one to one with the multiple static stresses.

[0102] S10. Obtain a plurality of peak accelerations according to the plurality of dynamic stresses, wherein the plurality of static stresses correspond one-to-one to the plurality of peak accelerations.

[0103] According to formula (2), multiple peak accelerations can be obtained.

[0104] S11. Draw a GP curve of the buffer material according to multiple static stresses and multiple peak accelerations.

[0105] After obtaining multiple static stresses and multiple peak accelerations that correspond one to one, the GP curve can be obtained by marking points on the coordinate system and performing curve fitting.

[0106] After executing step S11, the GP curve corresponding to the specified set of mass drop heights and cushioning material thicknesses can be obtained. Subsequently, the value of the mass drop height and the value of the cushioning material thickness can be adjusted to obtain GP curves corresponding to different heights and thicknesses, thereby obtaining a more complete GP curve.

[0107] The method for obtaining the GP curve provided in this embodiment does not require a large number of experiments, is low in cost, and has complete data. It can not only obtain the GP curve of a buffer material of a specific thickness, but also obtain the GP curve of any thickness.

[0108] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for determining the cushioning performance of a cushioning material, characterized in that: The steps include: Determine the value range of the unit volume deformation energy of the cushioning material; Select n unit volume deformation energies within the value range; For each unit volume deformation energy, determine a set of test data to obtain n sets of test data, each set of test data including static stress, drop height of the mass block, and thickness of the buffer material; Performing a drop test according to each set of test data, and collecting peak accelerations of the mass block during the test to obtain multiple sets of peak accelerations; determining a plurality of sets of dynamic stresses based on a plurality of the peak accelerations; The buffering performance of the buffer material is obtained by fitting multiple sets of dynamic stresses and n unit volume deformation energies with exponential functions. The method of fitting the multiple sets of dynamic stresses and n unit volume deformation energies with exponential functions to obtain the cushioning performance of the cushioning material comprises the following steps: During the test, the acceleration of the mass block is collected at each moment, and a curve showing the relationship between acceleration and time is obtained; Obtaining a linear relationship between the correction parameter and the thickness of the buffer material according to the relationship curve between acceleration and time; Correcting the first relationship according to the linear relationship to obtain a corrected first relationship, wherein the first relationship is a relationship between unit volume deformation energy and static stress, a drop height of the mass block, a cushioning material, and a correction parameter; Determine n corrected unit volume deformation energies according to the corrected first relationship; The buffering performance of the buffer material is obtained by fitting multiple sets of dynamic stresses with n corrected unit volume deformation energies through exponential functions. The first relational expression is Among them, E t represents the deformation energy per unit volume, S represents the static stress, H represents the drop height of the mass block, δ represents the correction parameter, and T represents the thickness of the buffer material.

2. The method for determining the cushioning performance of a cushioning material according to claim 1, wherein: For each unit volume deformation energy, a set of test data is determined including: A set of test data is determined for each unit volume deformation energy and the first relationship, and the correction coefficient δ is related to the thickness of the buffer material.

3. The method for determining the cushioning performance of a cushioning material according to claim 1, wherein: The linear relationship between the correction parameter and the thickness of the buffer material is δ=a1×T+b1, wherein δ represents the correction parameter, a1 and b1 are constants, and T represents the thickness of the buffer material.

4. The method for determining the cushioning performance of a cushioning material according to claim 1, wherein: The formula for fitting multiple sets of dynamic stresses and n corrected unit volume deformations is: Among them, S d represents dynamic stress, a2, b2, c are constants, E t It represents the deformation energy per unit volume.

5. The method for determining the cushioning performance of a cushioning material according to claim 1, wherein: Selecting n unit volume deformation energies within the value range includes: selecting n unit volume deformation energies at equal intervals within the value range.

6. The method for determining the cushioning performance of a cushioning material according to claim 1, wherein: When a set of test data is determined for each unit volume deformation, the thicknesses of the n buffer materials are gradually increased or decreased.

7. The method for determining the cushioning performance of a cushioning material according to claim 1, wherein: Determine multiple sets of dynamic stresses based on multiple sets of peak accelerations, including according to formula S d =a max ×S to calculate dynamic stress, where S d represents dynamic stress, a max represents the peak acceleration, S represents the static stress, and W represents the weight of the mass block, and A represents the buffer area.

8. The method for determining the cushioning performance of a cushioning material according to claim 1, wherein: The following steps are also included: Specify the drop height of the mass block and the thickness of the cushioning material; Select multiple static stresses within the static stress value range; Obtaining a dynamic stress corresponding to each static stress according to the plurality of static stresses, the buffering performance of the buffer material, and a specified drop height of the mass block and the thickness of the buffer material; Obtaining a plurality of peak accelerations according to the plurality of dynamic stresses, wherein the plurality of static stresses correspond one to one with the plurality of peak accelerations; A GP curve of the buffer material is drawn according to the multiple static stresses and the multiple peak accelerations.

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