Calibration and extended validation of a virtual asphalt mixture compaction model using bullet physics engine

Komaragiri, Satyavati; Gigliotti, Alex; Bhasin, Amit

doi:10.1016/j.conbuildmat.2021.125257

Cited by 13 publications

(3 citation statements)

References 27 publications

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“…He et al (2020) compared physics engine and DEM simulations in granular soil behavior and showed that the physics engine achieved similar results to those of the DEM in a significantly shorter time. Komaragiri et al (2021) demonstrated that the compaction behavior of asphalt mixture from Bullet simulation was very similar to the compaction behavior recorded from laboratory measurements.…”

Section: Physics Engine Applicationssupporting

confidence: 67%

Virtual Shake Robot: Simulating Dynamics of Precariously Balanced Rocks for Overturning and Large-displacement Processes

Chen,

Arrowsmith,

Das

et al. 2024

Seismica

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Understanding the dynamics of precariously balanced rocks (PBRs) is important for seismic hazard analysis and rockfall prediction. Utilizing a physics engine and robotic tools, we develop a virtual shake robot (VSR) to simulate the dynamics of PBRs during overturning and large-displacement processes. We present the background of physics engines and technical details of the VSR, including software architecture, mechanical structure, control system, and implementation procedures. Validation experiments show the median fragility contour from VSR simulation is within the 95% prediction intervals from previous physical experiments, when PGV/PGA is greater than 0.08 s. Using a physical mini shake robot, we validate the qualitative consistency of fragility anisotropy between the VSR and physical experiments. By overturning cuboids on flat terrain, the VSR reveals the relationship between fragility and geometric dimensions (e.g., aspect and scaling ratios). The ground motion orientation and lateral pedestal support affect PBR fragility. Large-displacement experiments estimate rock trajectories for different ground motions, which is useful for understanding the fate of toppled PBRs. Ground motions positively correlate with large displacement statistics such as mean trajectory length, mean largest velocity, and mean terminal distance. The overturning and large displacement processes of PBRs provide complementary methods of ground motion estimation.

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Section: Physics Engine Applicationssupporting

confidence: 67%

Virtual Shake Robot: Simulating Dynamics of Precariously Balanced Rocks for Overturning and Large-displacement Processes

Chen,

Arrowsmith,

Das

et al. 2024

Seismica

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“…Даний рушій підходить також для симуляції фізики зсуву у гранульованих середовищах [16], таких, як грунти, у геотехнічній інженерії. Також, використання фізичного рушія Bullet дає змогу позбутись великої кількості реальних експериментів з такими матеріалами, як асфальтна суміш або ґрунти різного походження, замінивши їх на фізичну симуляцію, про що пишуть автори у статтях [16] та [17].…”

Section: Physxunclassified

Методи Та Програмні Засоби Фізичної Симуляції

Бернатович,

Стеценко

2023

збірник «Адаптивні Системи Автоматичного Управління Міжвідомчий

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Об’єктом дослідження є фізичний рушій для наукової симуляції. У дослідженні розглянуто основні типи фізичної симуляції та задачі, які вони вирішують, наведено детальний опис та порівняльний аналіз програмних застосунків фізичної симуляції таких, як PhysX, Bullet та Femap, визначено їх переваги та недоліки в контексті використання для наукового дослідження об’єктів і систем. У випадку наукової симуляції, оригінальність задачі або об’єкта дослідження спричиняє необхідність модифікації вихідного програмного коду фізичного рушія, що значно впливає на складність та швидкість проведення наукового дослідження. Тому необхідною є розробка рушія, фізична модель якого може бути легко модифікована без втручання у вихідний код шляхом налаштування набору програмних модулів. Метою роботи є підвищення ефективності використання фізичного рушія для створення наукових симуляцій. Сформульовані вимоги до розробки нового багатоцільового наукового фізичного рушія, що забезпечує середовище для проведення експериментальних досліджень на основі симуляцій. Бібл. 26, іл. 3, табл. 1

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“…During compaction, the friction-lubrication effects between aggregate particles have a significant influence on the compaction characteristics and compaction effect; for example, sufficiently lubricated dense-graded asphalt mixtures are easily compacted [24]. In addition, some scholars have defined some new indicators to describe the compaction properties [25]; for example, based on the variation in particle stress and the height of the specimen, the rate change of compaction in logarithmic coordinates has been proposed to characterise the compaction properties of asphalt mixtures [26,27]. The compaction increase rate (CIR) indicator was defined to describe the quality of pre-compaction based on discrete element method (DEM) simulation and field tests [28].…”

Section: Introductionmentioning

confidence: 99%

The Friction–Lubrication Effect and Compaction Characteristics of an SMA Asphalt Mixture under Variable Temperature Conditions

Wu,

Tang,

Liu

et al. 2024

Materials

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The aim of this article is to explore the dynamic compaction characteristics of stone mastic asphalt (SMA) and the friction–lubrication effect of internal particles during the superpave gyratory compaction (SGC) process. Firstly, a calculated method for the compaction degree of an asphalt mixture in the gyratory compaction process was defined based on the multiphase granular volume method. Secondly, the gyratory compaction curves of asphalt mixtures were taken based on this calculation method of compaction degree. The dynamic change law of each compaction index (compaction, percentage of air voids, compaction energy index, etc.) during the compaction process was analysed. Finally, the effects of different initial compaction temperatures and different asphalt content on the friction–lubrication effect and compaction characteristics of asphalt mixtures were studied. Research shows that it is reasonable to define the compaction degree by the ratio of the apparent density of the asphalt mixture to the maximum theoretical density of the asphalt mixture during gyratory compaction. The dynamic prediction equations of the compaction degree K and the compaction energy index CEI with the amount of compaction were established, and could effectively predict the compaction degree, percentage of air voids and compaction energy index CEI. The compaction process of the asphalt mixture needed to go through three phases, including periods of rapid growth, slow growth, and stabilisation, and the compaction degree increased by about 10%, 5%, and 1%, in that order, finally tending towards a stable value. The effect of the initial compaction temperature on the forming compaction degree of the asphalt mixture is significant; therefore, it should be controlled strictly in the compaction construction of asphalt mixtures. When the initial compaction temperature of SMA-13 is about 170 °C, the compaction effect is optimal, and the effect of the increase in the amount of compaction at a later stage on the increase in the compaction degree of the asphalt mixture is very low. With the optimal asphalt content, the friction–lubrication effect between the asphalt and aggregate particles is optimal, because it can effectively form an asphalt film, reducing the frictional resistance of the particles moving each other during the compaction process, and the voids will be embedded and filled with each other, finally producing the best compaction result.

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Calibration and extended validation of a virtual asphalt mixture compaction model using bullet physics engine

Cited by 13 publications

References 27 publications

Virtual Shake Robot: Simulating Dynamics of Precariously Balanced Rocks for Overturning and Large-displacement Processes

Virtual Shake Robot: Simulating Dynamics of Precariously Balanced Rocks for Overturning and Large-displacement Processes

Методи Та Програмні Засоби Фізичної Симуляції

The Friction–Lubrication Effect and Compaction Characteristics of an SMA Asphalt Mixture under Variable Temperature Conditions

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