A Vibratory Conveying Method for Planetary Regolith: Preliminary Experiment and Numerical Simulation

Chen, Huazhi; Li, Lifang; Zhang, Weiwei; Liu, Rongkai

doi:10.1109/access.2019.2902348

Cited by 5 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For rigid pebbles, this paper selected the elastic linear contact model [37] as the basic contact model of the pebbles. The model is widely used to simulate the contact mechanics and movements of rigid particles [39], [40].…”

Section: Pebble Dem Model Contact Algorithmmentioning

confidence: 99%

Discrete Element Analysis of the Reconstruction Method for Randomly Shaped Pebbles

Liu

Zhao

et al. 2019

IEEE Access

View full text Add to dashboard Cite

The pebble shape is a critical factor that affects the bearing characteristics of truck escape ramps. In this paper, a reconstruction method was proposed for randomly shaped pebbles used in truck escape ramps, and statistical analysis was conducted on the results of pebble compression tests. First, 100 pebble samples were randomly selected, and the pebble outlines were fitted in three views. The overlapping method was implemented to fill the three views with ball elements, and the ball elements were then extended into three-dimensions. The results demonstrated that the proposed method satisfactorily monitored the real pebble shapes. Second, statistical analyses were conducted on the parameters of the outlines, and corresponding data sets were built. The key parameters of the pebble DEM model, such as the friction coefficient, were calibrated based on the compression test results, and repeated simulation results verified the feasibility of the proposed pebble DEM model. Next, statistical analysis was conducted on the probability distribution of the contact forces. Third, simulations were conducted with different pressing plate velocities and pebble shapes. The results indicated that the pressing plate velocities had minor effects on the contact forces. As the pressing plate velocity increased, the slope of the contact forces correspondingly increased. The particle shape was a critical factor affecting the simulation results. With the same contact parameters, the simulation results of different pebble shapes varied greatly, which further indicated the importance of the proposed pebble shape reconstruction method. The proposed pebble DEM model could be further used in the design of truck escape ramps. INDEX TERMS Truck escape ramp, randomly shaped pebbles, discrete element method (DEM), contact mechanism, friction coefficient.

show abstract

Section: Pebble Dem Model Contact Algorithmmentioning

confidence: 99%

Discrete Element Analysis of the Reconstruction Method for Randomly Shaped Pebbles

Liu

Zhao

et al. 2019

IEEE Access

View full text Add to dashboard Cite

show abstract

“…23,24 Since 2009, the team has carried out plenty of pre-research work on the impact penetrator especially in the period when it undertook the third stage tasks for lunar sampling in National Lunar Exploration Project. 25,26 Research topics on peristaltic tunneling penetrators, impact-actuated penetrators, and auger drilling and coring techniques have been carried out successively. A variety of prototypes of penetrators have been developed to verify the feasibility on the principle of impact-actuated penetrating methods.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation on interaction process between impact penetrator and lunar soil particles for lunar subsurface exploration

Shen

Deng

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

Unmanned in-situ exploration is an important technique to study the physical and mechanical parameters of lunar composition and evolution. The impact penetrator is an effective device for in-situ detection of the lunar soil profile at predetermined depth. Because of the lack of real lunar soil samples, it is very difficult to study and evaluate the performance of the impact penetrator. In order to truly reflect the interaction between the impact penetrator and lunar soil particles, a simulation model of the lunar soil body was established by means of discrete-element analysis, and the model parameters were matched and verified by the experimental method. Based on this model, the interaction behaviors between the penetrators with different head configurations and the lunar soil body were simulated. The stress field distribution in the lunar soil body and particle movement patterns during the penetrating process were revealed, which reflects the working principle and performance of the penetrator. The numerical simulation on the interaction process between the impact penetrator and lunar soil particles provides a feasible and effective method for the design and optimization of the penetrator, which will contribute to the development of lunar subsurface in-situ exploration technologies.

show abstract

A novel lunar soil coring approach based on particle unidirectional flow effect to reduce drag and increase efficiency

Chen

Cui

et al. 2021

Advances in Space Research

View full text Add to dashboard Cite

A Vibratory Conveying Method for Planetary Regolith: Preliminary Experiment and Numerical Simulation

Cited by 5 publications

References 36 publications

Discrete Element Analysis of the Reconstruction Method for Randomly Shaped Pebbles

Discrete Element Analysis of the Reconstruction Method for Randomly Shaped Pebbles

Numerical simulation on interaction process between impact penetrator and lunar soil particles for lunar subsurface exploration

A novel lunar soil coring approach based on particle unidirectional flow effect to reduce drag and increase efficiency

Contact Info

Product

Resources

About