CN107885933A - A kind of pavement structure fatigue cracking method for numerical simulation based on extension finite element - Google Patents
A kind of pavement structure fatigue cracking method for numerical simulation based on extension finite element Download PDFInfo
- Publication number
- CN107885933A CN107885933A CN201711082963.0A CN201711082963A CN107885933A CN 107885933 A CN107885933 A CN 107885933A CN 201711082963 A CN201711082963 A CN 201711082963A CN 107885933 A CN107885933 A CN 107885933A
- Authority
- CN
- China
- Prior art keywords
- fatigue
- pavement structure
- data
- finite element
- cracking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005336 cracking Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004088 simulation Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 63
- 230000008569 process Effects 0.000 claims abstract description 11
- 230000001052 transient effect Effects 0.000 claims abstract description 11
- 230000006911 nucleation Effects 0.000 claims abstract description 8
- 238000010899 nucleation Methods 0.000 claims abstract description 8
- 238000009825 accumulation Methods 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims description 11
- 102100021503 ATP-binding cassette sub-family B member 6 Human genes 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 9
- 101100000375 Homo sapiens ABCB6 gene Proteins 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000001932 seasonal effect Effects 0.000 claims description 6
- 238000011161 development Methods 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 3
- 206010016256 fatigue Diseases 0.000 abstract description 68
- 238000013461 design Methods 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000009533 lab test Methods 0.000 abstract 1
- 208000016255 tiredness Diseases 0.000 abstract 1
- 230000003867 tiredness Effects 0.000 abstract 1
- 239000010426 asphalt Substances 0.000 description 5
- 230000000977 initiatory effect Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000009661 fatigue test Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Computational Mathematics (AREA)
- Civil Engineering (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Architecture (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of pavement structure fatigue cracking method for numerical simulation based on extension finite element, including：Experiment determines mechanics parameter, thermal parameters, the fatigue life data of material；Fitting obtains being applicable the Fatigue Damage Model of corresponding ground surface material；The accumulation of fatigue damage is realized to unit material using Tiredness model；Define the crack nucleation starting criterion of attacking material；Analog temperature field；The fatigue cracking process of simulated roadway structure.The present invention considers fatigue and influenced each other with intercoupling for cracking, and uses transient state temperature field in simulating, and accurately simulates influence of the temperature for pavement fatigue problem of Cracking；The fatigue cracking Whole Process Simulation of the pavement material under approximate actual pavement behavior is realized, the data of laboratory test are more efficiently used for the prediction in punishing road life-span, foundation and guidance are provided for design and the maintenance work of road.
Description
Technical Field
The invention belongs to the technical field of road engineering data processing, relates to a road surface data simulation method, and particularly relates to a road surface structure fatigue cracking numerical simulation method based on an expanded finite element.
Background
The fatigue cracking behavior of asphalt pavements is a complex comprehensive problem, and the fatigue property of asphalt pavements is difficult to obtain by using indoor tests due to the large-scale property of actual pavements. The approximation method of popularizing the indoor test commonly adopted in the current specification and research to the actual road surface has great humanity, and the accurate fatigue cracking life of the road is difficult to obtain. And the pure test method is time-consuming and labor-consuming, especially for large-scale test roads and foot-scale tests.
At present, many researches on the aspects of load mode, constitutive relation, crack development and the like have been made on the numerical simulation of the fatigue life of the road. However, fatigue and cracking of the road surface are not mutually independent processes, and it is difficult to accurately predict the deterioration process of the road surface performance by independently studying the fatigue behavior or cracking behavior of the road surface structure. And the asphalt mixture is used as a temperature sensitive material, and the fatigue life of the asphalt pavement is obviously influenced by the change of the temperature. Therefore, the research on the whole fatigue-cracking process of the asphalt pavement under the continuous temperature change condition is extremely important for accurately predicting the fatigue life of the pavement.
Disclosure of Invention
In order to make up for the defects of an experimental method and the existing road surface fatigue numerical simulation method, the invention provides a road surface structure fatigue cracking numerical simulation method based on an expanded finite element.
In order to achieve the purpose, the invention provides the following technical scheme:
a pavement structure fatigue cracking numerical simulation method based on an expanded finite element comprises the following steps:
step 1, performing an indoor material test, and determining mechanical parameters and thermal parameters of a road material under a non-damage condition and fatigue life data of the material;
step 2, fitting fatigue life data of the material by using a fatigue damage model according to damage mechanics to obtain a fatigue damage model suitable for the corresponding pavement material;
step 3, the fatigue damage model obtained in the step 2 is programmed into a material subprogram UMAT of the ABAQUS finite element software user, the definition of the mechanical property and the thermal property of the material is realized in the subprogram, the fatigue damage accumulation is realized on the unit material by using the fatigue model, and then the stress strain data of the node is updated and returned to the main program;
step 4, endowing the XFEM property of the expanded finite element crack to the whole pavement structure, and defining a crack nucleation starting criterion of the damaged material by using a user subprogram UDMGINI provided by ABAQUS;
step 5, simulating typical temperature fields of the road surface in different seasons by using meteorological data of the local road surface in advance;
and 6, repeatedly setting the temperature field, applying proper load to the pavement structure, and utilizing thermal coupling analysis to realize the fatigue-cracking overall process simulation of the pavement structure under the transient temperature field.
Further, the mechanical parameters in the step 1 include an elastic modulus and a poisson ratio, and the relationship between the elastic modulus and the poisson ratio as well as the temperature is fitted; the thermal parameters include thermal conductivity and specific heat; the fatigue life data is used for measuring the fatigue life of the strain mode under different temperature conditions.
Further, the fatigue damage model in step 2 adopts a nonlinear fatigue damage model represented by the following formula:
in the above formula: d is fatigue damage degree; n is the stress cycle number; a is * P and q are fatigue parameters.
Furthermore, in the step 3, stress-strain temperature data in the main program of ABAQUS is also required to be accessed into a sub-program UMAT, in the sub-program, fatigue damage accumulation is realized on unit materials by using the fatigue model obtained in the step 2, and then the stress-strain data of the node is updated and returned to the main program.
Further, the step 4 specifically includes the following steps:
subroutine UDMGINI defines the fracture nucleation initiation criteria for damaged materials using the model shown below:
in the above formula: s is the residual strength; s 0 Is the initial strength of the material; d ms ，D m Respectively a fatigue damage critical value defined by strength and a fatigue damage critical value defined by stiffness; d is the fatigue damage degree of the current material, and omega is a material parameter;
calculating the residual strength S and the maximum principal stress sigma of the node of the material by using the fatigue damage degree of the material accumulated in the step 3 and the stress data introduced by the main program max (ii) a Then calculating a damage criterion index value FINDEX and a cracking direction FNORMAL; the damage criterion index value is defined as:
if FINDEX meets the conditions, the XFEM cracking mechanism is activated, and then the material behavior is controlled by the XFEM cracking mechanism.
Further, the step 5 specifically includes the following steps: the meteorological data are used to obtain the average solar radiation, wind speed and average daily air temperature change data of each local season, and then the boundary condition is used to simulate the seasonal temperature field of the pavement structure.
Further, the step 6 specifically includes the following steps: setting a proper traffic load by utilizing a thermal coupling distribution step and repeatedly setting a seasonal temperature field to simulate the pavement performance development under the condition of continuous temperature change for many years; in the analysis, the temperature field data is transmitted to a subroutine UMAT, the mechanical response of the pavement structure in a transient temperature field is completed, and then the structure is developed according to the fatigue damage-cracking mechanism defined in the step 3 and the step 4 in the transient temperature field.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the simulation method disclosed by the invention integrates the fatigue problem and the cracking problem of the pavement structure to simulate, the mutual coupling and mutual influence of fatigue and cracking are considered, and the transient temperature field is adopted in the simulation, so that the influence of temperature on the fatigue cracking problem of the pavement is accurately simulated; the fatigue-cracking overall process simulation of the road material under the condition similar to the actual road surface is realized, the data of the indoor test is more effectively used for predicting the fatigue life of the road, and basis and guidance are provided for the design and maintenance work of the road.
Drawings
FIG. 1 is a flow chart of a route structure fatigue cracking numerical simulation method based on an extended finite element provided by the invention.
Detailed Description
The technical solutions provided by the present invention will be described in detail with reference to specific examples, which should be understood that the following specific embodiments are only illustrative and not limiting the scope of the present invention.
The invention provides a route structure fatigue cracking numerical simulation method based on an expanded finite element, the flow of which is shown in figure 1, and the method comprises the following steps:
(1) And (4) carrying out corresponding indoor material tests, and determining mechanical parameters and thermal parameters of the road material under the condition of no damage. The road material comprises a road surface material and a roadbed material, the measured mechanical parameters comprise the elastic modulus and the Poisson ratio in a wide temperature change range, and the relation between the elastic modulus and the Poisson ratio as well as the temperature is fitted so as to consider the influence of a temperature field on the stress of the structure. The elastic modulus and poisson's ratio will then be programmed into the subroutine UMAT for mechanical response in the transient temperature field of the structure. If the correlation data at a temperature that is difficult to measure in a laboratory exists under the actual road surface condition, the actual condition at the temperature should be reasonably compensated for. The measured thermal parameters comprise thermodynamic parameters such as material thermal conductivity, specific heat and the like, and are used for simulating a temperature field of the pavement structure, and the local average temperature is taken during measurement. In the step, a material fatigue life test is also carried out, and a plurality of groups of fatigue tests under different temperature conditions in a stress control mode are suitable.
(2) According to the damage mechanics, the fatigue life data is fitted by using a proper fatigue damage model, and the method adopts the following nonlinear fatigue damage model:
in the above formula: d is fatigue damage degree; n is the stress cycle number; a is * P and q are fatigue parameters, are related to temperature and stress loading level, and are obtained by regression of test data.
The above model is a preferred embodiment, and other fatigue damage models may be used instead of the above model as needed.
And (2) fitting the parameters in the formula (1) by using the fatigue life test result of the indoor material in the step (1) to obtain a fatigue damage model suitable for the corresponding pavement material.
(3) And (3) programming the fatigue damage model which is obtained in the step (2) and is suitable for the corresponding pavement material into an ABAQUS finite element software user material subprogram UMAT, accessing data such as stress strain temperature and the like in an ABAQUS main program into the subprogram UMAT when repeated load acts, realizing definition of mechanical property and thermal property of the material in the subprogram, realizing accumulation of fatigue damage on the unit material by using the fatigue model obtained in the step (2) in the subprogram, and then updating the stress strain data of the node and returning the stress strain data to the main program.
(4) Based on the residual strength principle, determining the crack nucleation initiation criterion of the damaged material by using the fatigue test data in the step (1), wherein the method adopts the following damaged material residual strength model:
in the above formula: s is the residual strength; s. the 0 Is the initial strength of the material; d ms ，D m And D is respectively a fatigue damage critical value defined by strength, a fatigue damage critical value defined by stiffness and the fatigue damage degree of the current material. Omega is a material parameter and is obtained by experimental data regression.
And (3) endowing the XFEM property of the extended finite element crack to the whole pavement structure in a software interaction module, defining the crack nucleation initiation criterion of the damaged material by using a user subprogram UDMGINI provided by ABAQUS, and realizing the crack nucleation initiation criterion which changes along with fatigue development. Calculating the residual strength S of the material and the maximum principal stress sigma of the node by using the fatigue damage degree of the material accumulated in the step (3) and the stress data transmitted by the main program max . And then calculating a damage criterion index value FINDEX and a cracking direction FNORMAL. Wherein the impairment criterion index value is defined as:
if FINDEX >1, the XFAM cleavage mechanism is activated. The material behavior is then controlled by the XFEM cracking mechanism.
(5) The meteorological data are used to obtain the average solar radiation, wind speed and average daily air temperature change data of each local season, and then the boundary condition is used to simulate the seasonal temperature field of the pavement structure. This step is parallel to steps (3) and (4), and the order can be adjusted as long as it is completed before step (6).
(6) And (5) setting a proper traffic load by utilizing the thermal coupling distribution step and repeatedly setting the seasonal temperature field in the step (5) to simulate the pavement performance development under the condition of continuous temperature change for many years. In the analysis, the temperature field data is transmitted to a subprogram UMAT, the mechanical response of the pavement structure in a transient temperature field is completed, and then the structure develops in the transient temperature field according to the fatigue damage-cracking mechanism defined in the steps (3) and (4).
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (7)
1. A pavement structure fatigue cracking numerical simulation method based on an expanded finite element is characterized by comprising the following steps:
step 1, performing an indoor material test, and determining mechanical parameters and thermal parameters of a road material under a non-damage condition and fatigue life data of the material;
step 2, fitting the fatigue damage model by using the fatigue life data of the material according to the damage mechanics to obtain a fatigue damage model suitable for the corresponding pavement material;
step 3, the fatigue damage model obtained in the step 2 is programmed into an ABAQUS finite element software user material subprogram UMAT, the definition of the mechanical property and the thermal property of the material is realized in the subprogram, the fatigue damage accumulation of the unit material is realized by utilizing the fatigue model, and then the stress-strain data of the node is updated and returned to a main program;
step 4, endowing the XFEM property of the expanded finite element crack to the whole pavement structure, and defining a crack nucleation starting criterion of the damaged material by using a user subprogram UDMGINI provided by ABAQUS;
step 5, simulating typical temperature fields of the road surface in different seasons by using meteorological data of the local road surface in advance;
and 6, repeatedly setting the temperature field, applying proper load to the pavement structure, and utilizing thermal coupling analysis to realize the fatigue-cracking overall process simulation of the pavement structure under the transient temperature field.
2. The extended finite element-based pavement structure fatigue crack numerical simulation method of claim 1, wherein the mechanical parameters in step 1 comprise elastic modulus and poisson ratio, and the relationships between the elastic modulus and poisson ratio and temperature are fitted; the thermal parameters include thermal conductivity and specific heat; the fatigue life data is used for measuring the fatigue life of the strain mode under different temperature conditions.
3. The extended finite element-based pavement structure fatigue crack numerical simulation method of claim 1, wherein the fatigue damage model in the step 2 is a nonlinear fatigue damage model represented by the following formula:
in the above formula: d is fatigue damage degree; n is the number of stress cycles; a is * P and q are fatigue parameters.
4. The extended finite element-based pavement structure fatigue crack numerical simulation method of claim 1, wherein in the step 3, the stress-strain temperature data in the main program of ABAQUS is connected to a sub-program UMAT, in the sub-program, the fatigue model obtained in the step 2 is used for realizing the accumulation of fatigue damage to the unit material, and then the stress-strain data of the node is updated and returned to the main program.
5. The extended finite element-based pavement structure fatigue crack numerical simulation method of claim 1, wherein the step 4 specifically comprises the following processes:
subroutine UDMGINI defines the crack nucleation onset criteria for damaged materials using the model shown below:
in the above formula: s is the residual strength; s 0 Is the initial strength of the material; d ms ，D m Respectively defining a fatigue damage critical value defined by strength and a fatigue damage critical value defined by stiffness; d is the fatigue damage degree of the current material, and omega is a material parameter;
calculating the residual strength S and the maximum principal stress sigma of the node of the material by using the fatigue damage degree of the material accumulated in the step 3 and the stress data introduced by the main program max (ii) a Then calculating a damage criterion index value FINDEX and a cracking direction FNORMAL; the damage criterion index value is defined as:
if FINDEX meets the conditions, the XFEM cracking mechanism is activated, and then the material behavior is controlled by the XFEM cracking mechanism.
6. The extended finite element-based pavement structure fatigue crack numerical simulation method of claim 1, wherein the step 5 specifically comprises the following processes: the weather data is utilized to obtain the average solar radiation, the wind speed and the average daily air temperature change data of each local season, and then the boundary condition is utilized to simulate the seasonal temperature field of the pavement structure.
7. The extended finite element-based pavement structure fatigue crack numerical simulation method of claim 6, wherein the step 6 specifically comprises the following processes: setting appropriate traffic load by utilizing a thermal coupling distribution step and repeatedly setting a seasonal temperature field to simulate the pavement performance development under the condition of continuous change of temperature for many years; in the analysis, the temperature field data is transmitted to a subroutine UMAT, the mechanical response of the pavement structure in a transient temperature field is completed, and then the structure is developed according to the fatigue damage-cracking mechanism defined in the step 3 and the step 4 in the transient temperature field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711082963.0A CN107885933B (en) | 2017-11-07 | 2017-11-07 | Pavement structure fatigue cracking numerical simulation method based on extended finite element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711082963.0A CN107885933B (en) | 2017-11-07 | 2017-11-07 | Pavement structure fatigue cracking numerical simulation method based on extended finite element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107885933A true CN107885933A (en) | 2018-04-06 |
| CN107885933B CN107885933B (en) | 2021-07-30 |
Family
ID=61778813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711082963.0A Active CN107885933B (en) | 2017-11-07 | 2017-11-07 | Pavement structure fatigue cracking numerical simulation method based on extended finite element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107885933B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693053A (en) * | 2018-04-24 | 2018-10-23 | 东南大学 | A kind of test method of asphalt residual intensity |
| CN109241636A (en) * | 2018-09-11 | 2019-01-18 | 合肥工业大学 | Pavement structure multiple physical field approach of coupled numerical simulation based on finite element |
| CN109827855A (en) * | 2018-08-30 | 2019-05-31 | 长沙理工大学 | Seasonality corrosion couples down Reinforced Concrete Bridge life-span prediction method with fatigue |
| CN110457837A (en) * | 2019-08-15 | 2019-11-15 | 南京林业大学 | Various Seasonal asphalt pavement interlayer thermal hinders topographical analysis method |
| CN111488703A (en) * | 2019-01-28 | 2020-08-04 | 西南石油大学 | Method for simulating fracture toughness of layered rock based on expanded finite element |
| CN111693380A (en) * | 2020-07-15 | 2020-09-22 | 合肥工业大学 | Asphalt pavement fatigue damage prediction method based on finite elements |
| CN112765854A (en) * | 2021-01-21 | 2021-05-07 | 东南大学 | Pavement internal crack quantity prediction method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525704A (en) * | 2016-12-06 | 2017-03-22 | 武汉理工大学 | Method for predicting remaining life of bituminous pavement |
-
2017
- 2017-11-07 CN CN201711082963.0A patent/CN107885933B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525704A (en) * | 2016-12-06 | 2017-03-22 | 武汉理工大学 | Method for predicting remaining life of bituminous pavement |
Non-Patent Citations (3)
| Title |
|---|
| WANG SIQI 等: "Numerical analysis of reflective cracking and fatigue lives of semi-rigid pavement structures using ABAQUS and FE-SAFE", 《JOURNAL OF SOUTHEAST UNIVERSITY ( ENGLISH EDITION)》 * |
| 周生金: "沥青路面荷载与温度耦合作用疲劳特性研究", 《中国优秀博硕士学位论文全文数据库（硕士） 工程科技Ⅱ辑》 * |
| 金光来: "基于扩展有限元的沥青路面疲劳开裂行为的数值研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693053A (en) * | 2018-04-24 | 2018-10-23 | 东南大学 | A kind of test method of asphalt residual intensity |
| CN109827855A (en) * | 2018-08-30 | 2019-05-31 | 长沙理工大学 | Seasonality corrosion couples down Reinforced Concrete Bridge life-span prediction method with fatigue |
| CN109241636A (en) * | 2018-09-11 | 2019-01-18 | 合肥工业大学 | Pavement structure multiple physical field approach of coupled numerical simulation based on finite element |
| CN109241636B (en) * | 2018-09-11 | 2023-03-24 | 合肥工业大学 | Finite element-based road surface structure multi-physical field coupling numerical simulation method |
| CN111488703A (en) * | 2019-01-28 | 2020-08-04 | 西南石油大学 | Method for simulating fracture toughness of layered rock based on expanded finite element |
| CN111488703B (en) * | 2019-01-28 | 2021-08-10 | 西南石油大学 | Method for simulating fracture toughness of layered rock based on expanded finite element |
| CN110457837A (en) * | 2019-08-15 | 2019-11-15 | 南京林业大学 | Various Seasonal asphalt pavement interlayer thermal hinders topographical analysis method |
| CN111693380A (en) * | 2020-07-15 | 2020-09-22 | 合肥工业大学 | Asphalt pavement fatigue damage prediction method based on finite elements |
| CN112765854A (en) * | 2021-01-21 | 2021-05-07 | 东南大学 | Pavement internal crack quantity prediction method |
| CN112765854B (en) * | 2021-01-21 | 2024-01-09 | 东南大学 | Method for predicting number of cracks in pavement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107885933B (en) | 2021-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107885933B (en) | Pavement structure fatigue cracking numerical simulation method based on extended finite element | |
| CN104849155B (en) | The method that Remaining Service Life for Asphalt Pavement is predicted by core sample fatigue modulus combination property | |
| CN107908847B (en) | Asphalt pavement anti-rutting performance simulation method considering load and high-temperature gap | |
| Timm et al. | Development of mechanistic-empirical pavement design in Minnesota | |
| Liu et al. | Thermal field characteristic analysis of steel bridge deck during high-temperature asphalt pavement paving | |
| CN104727207A (en) | Structural maintenance and design method of semi-rigid base-layer asphalt pavement | |
| CN108761571A (en) | Atmospheric visibility prediction technique based on neural network and system | |
| CN115859837B (en) | Digital twin modeling-based fan blade dynamic impact detection method and system | |
| Hossain et al. | Prediction of international roughness index of flexible pavements from climate and traffic data using artificial neural network modeling | |
| CN111693380A (en) | Asphalt pavement fatigue damage prediction method based on finite elements | |
| Li et al. | Stochastic fatigue damage in viscoelastic materials using probabilistic pseudo J-integral Paris' law | |
| Nivitha et al. | Development of pavement temperature contours for India | |
| Liu et al. | Fatigue lifespan assessment of stay cables by a refined joint probability density model of wind speed and direction | |
| Zaghloul et al. | Investigations of environmental and traffic impacts on Mechanistic–Empirical Pavement Design Guide predictions | |
| Zhao et al. | Temperature adaptability of asphalt pavement to high temperatures and significant temperature differences | |
| CN112765854B (en) | Method for predicting number of cracks in pavement | |
| CN113886928A (en) | Architectural mechanics analog system | |
| CN203759005U (en) | Testing device for aging degree of asphalt pavement along depth direction | |
| Zhang et al. | Developing fragility curves for asphalt mixture to assess the uncertainty of the permanent deformation performance | |
| CN117312750A (en) | Preventive maintenance method based on cement concrete pavement | |
| CN111625984A (en) | Asphalt pavement water damage numerical simulation method based on finite elements | |
| CN110728092A (en) | Method for establishing and using temperature coupling model of mixed asphalt pavement structure | |
| Khiavi et al. | Analytical evaluation of the rutting critical response function under the heavy vehicle’s moving in flexible pavement | |
| Wu et al. | Sensitivity analysis of asphalt pavement performance under freeze-thaw cycles by applying reliability method | |
| Tsai et al. | Prediction of reflection cracking in hot-mix asphalt overlays |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231222 Address after: No. 62 Suyuan Avenue, Jiangning Development Zone, Nanjing City, Jiangsu Province, 211106 (Jiangning Development Zone) Patentee after: Jiangsu Chuangwei Transportation Technology Development Co.,Ltd. Address before: 211189 No. 2, Four Pailou, Xuanwu District, Nanjing City, Jiangsu Province Patentee before: SOUTHEAST University |