Fatigue-Damage Model of a Pothole-Repairing Composite Structure for Asphalt Pavement

2017 ◽  
Vol 29 (11) ◽  
pp. 04017215 ◽  
Author(s):  
Qian Zhang ◽  
Jiawei Zhang ◽  
Ze Li ◽  
Zhiguang Wen ◽  
Yonghong Yang
Keyword(s):  
Fatigue Damage ◽  
Composite Structure ◽  
Asphalt Pavement ◽  
Damage Model

scholarly journals Research on Fatigue Model of Semi-Rigid Base Asphalt Pavement before and after Polymer Grouting

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Bei Zhang ◽  
Xu Zhang ◽  
Yanhui Zhong ◽  
Xiaolong Li ◽  
Meimei Hao ◽  
...  
Keyword(s):  
Numerical Model ◽  
Service Life ◽  
Fatigue Damage ◽  
Mechanical Response ◽  
Asphalt Pavement ◽  
Damage Model ◽  
Vertical Displacement ◽  
Polymer Materials ◽  
Rigid Base ◽  
Before And After

To improve the service life of a semirigid base asphalt pavement and prolong its service cycle, it is imperative to conduct long-term performance research before and after pavement disease repair. This study proposes a fatigue damage model for pavement and polymer materials and uses the finite element method to establish a three-dimensional numerical model of a semirigid base asphalt pavement structure. Moreover, it compares and analyzes the mechanical response and fatigue damage of this pavement before and after polymer repair. The evolution law is verified by indoor fatigue tests. The results show that, under a standard load of 0.7 MPa, the vertical displacement and the Mises stress of the vacant position after the polymer repair are reduced by 61% and 69%, respectively. Under a cyclic load of 1.2 MPa, the number of load actions increases from 500,000 to more than 5 million, and the fatigue damage factor of the polymer is reduced by 29%. With the increase in the number of fatigue test loads, the cumulative evolution trend of the fatigue damage is basically consistent with the results of the numerical simulation, which verifies the rationality of the numerical model. This research is relevant for providing a reference for extending the service life of expressways and improving the technical level of expressway maintenance.

scholarly journals A multi‐scale fatigue‐damage model for fiber‐reinforced polymers

PAMM ◽  
2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Nicola Magino ◽  
Jonathan Köbler ◽  
Heiko Andrä ◽  
Matti Schneider ◽  
Fabian Welschinger
Keyword(s):  
Fatigue Damage ◽  
Damage Model ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Multi Scale

scholarly journals A Fatigue Damage Model for Life Prediction of Injection-Molded Short Glass Fiber-Reinforced Thermoplastic Composites

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2250
Author(s):  
Mohammad Amjadi ◽  
Ali Fatemi
Keyword(s):  
Injection Molding ◽  
Glass Fiber ◽  
Fatigue Damage ◽  
Life Prediction ◽  
Glass Fibers ◽  
Damage Model ◽  
Fiber Reinforced ◽  
Short Glass Fiber ◽  
Glass Fiber Reinforced ◽  
Short Glass

Short glass fiber-reinforced (SGFR) thermoplastics are used in many industries manufactured by injection molding which is the most common technique for polymeric parts production. Glass fibers are commonly used as the reinforced material with thermoplastics and injection molding. In this paper, a critical plane-based fatigue damage model is proposed for tension–tension or tension–compression fatigue life prediction of SGFR thermoplastics considering fiber orientation and mean stress effects. Temperature and frequency effects were also included by applying the proposed damage model into a general fatigue model. Model predictions are presented and discussed by comparing with the experimental data from the literature.

A Multi-Level Low Cycle Fatigue Damage Model for Forging Die Material

2006 ◽  
Vol 514-516 ◽  
pp. 804-809
Author(s):  
S. Gao ◽  
Ewald Werner
Keyword(s):  
Fatigue Life ◽  
Fatigue Damage ◽  
Low Cycle Fatigue ◽  
Damage Model ◽  
Fatigue Loading ◽  
Cycle Fatigue ◽  
Die Material ◽  
Multi Level ◽  
Loading Sequence ◽  
Forging Die

The forging die material, a high strength steel designated W513 is considered in this paper. A fatigue damage model, based on thermodynamics and continuum damage mechanics, is constructed in which both the previous damage and the loading sequence are considered. The unknown material parameters in the model are identified from low cycle fatigue tests. Damage evolution under multi-level fatigue loading is investigated. The results show that the fatigue life is closely related to the loading sequence. The fatigue life of the materials with low fatigue loading first followed by high fatigue loading is longer than that for the reversed loading sequence.

Analysis on the Fatigue Life of Asphalt Pavement under Traffic Flow Loads

2013 ◽  
Vol 361-363 ◽  
pp. 1727-1734
Author(s):  
Meng Qi Gao ◽  
Ping Ying Wang ◽  
He Ping Ding
Keyword(s):  
Fatigue Life ◽  
Fracture Mechanics ◽  
Fatigue Fracture ◽  
Fatigue Damage ◽  
Asphalt Pavement ◽  
Ansys Software ◽  
Element Analysis ◽  
Damage Area ◽  
Traffic Loads ◽  
Damage Rule

To study the fatigue life of asphalt pavement under traffic loads, a 3-D finite element analysis (FEA) Visio-elastic road model was established on the layered theory with ANSYS software. The fatigue damage was calculated with the maximum horizontal tensile strain of asphalt layer bottom based on the fatigue fracture mechanics, when single axis went across. Then the fatigue life was obtained after the fatigue damage occurred in some degree by the Miners linear cumulative damage rule. The results show that it taken 3.4 years when the damage area reached 10% of wheel path area, and 4.5years when reached 45%; while the calculated result was 5.5 years by axial-load conversion method. The analysis shows that the fatigue life of asphalt pavement calculated by fatigue fracture mechanics rule has more significance in practice.

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