scholarly journals Experimental Study on Anchorage Performance of Resin Grout with Steel Segment

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Junchao Shen
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Simulation Method ◽  
The Self ◽  
Underground Space ◽  
Anchorage System ◽  
Different Types ◽  
Improvement Effect ◽  
Addition Amount

With the advantages of large anchoring force and fast anchoring speed, resin cartridge has become the main anchoring means of geotechnical engineering and underground space engineering support. Based on the theoretical analysis, it is clear that adding aggregate can improve the mechanical properties of grout and the bolt-grout interface stress state; the mechanical properties of aggregate are positively correlated with its improvement effect on anchorage performance. By using the numerical simulation method, it is concluded that the addition of steel segments into the resin grout can improve the stiffness of the anchorage system and enhance the energy absorption and antifailure ability of the anchorage system. Relying on the self-developed anchorage mixing device, the effects of steel segment diameter and addition amount on the anchoring force were studied experimentally, and the optimal addition amount of different types of steel segment to improve the maximum anchoring force was determined.

Thermomechanical Analysis of Poly (Bisphenol-A Carbonate) Performance and Molecular Simulation

2013 ◽  
Vol 781-784 ◽  
pp. 576-579
Author(s):  
Xiu Juan Wang ◽  
Xiu Ting Zheng ◽  
Meng Song ◽  
Xiu Ying Zhao ◽  
Si Zhu Wu
Keyword(s):  
Molecular Structure ◽  
Mechanical Properties ◽  
Thermal Stability ◽  
Bisphenol A ◽  
Molecular Simulation ◽  
Simulation Method ◽  
Thermomechanical Analysis ◽  
Optical Performance ◽  
Different Types ◽  
Simulation Results

This work studied the influence of different molecular structure of polycarbonate on its properties. Different types of polycarbonate molecular chain models were built by molecular simulation method. By combining experimental and molecular dynamic simulation results, it is concluded that the polycarbonate-OQ2720 has better thermal stability, mechanical properties and optical performance, which is a better choice for aviation materials and manufacturing process.

Experimental study and numerical simulation on the structural and mechanical properties of Typha leaves through multimodal microscopy approaches

Micron ◽  
2018 ◽  
Vol 104 ◽  
pp. 37-44 ◽  
Author(s):  
Jingjing Liu ◽  
Zhihui Zhang ◽  
Zhenglei Yu ◽  
Yunhong Liang ◽  
Xiujuan Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Experimental Study

Numerical Simulation and Experimental Research on Fatigue Strength of the Injector Guide Pillar under Complex Loads

2010 ◽  
Vol 118-120 ◽  
pp. 196-200
Author(s):  
Jin Guo Li ◽  
Xiao Gui Wang ◽  
Zeng Liang Gao
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Fatigue Life ◽  
Fatigue Strength ◽  
Numerical Analysis ◽  
Experimental Research ◽  
Contact Surface ◽  
Electronic Measurement

Under the complex loads, the injector guide pillar (IGP) used in injection machine was failure only after 1.5-year-service. In order to determine the cause of the fracture, the numerical simulation technology was applied to analyze the mechanical properties of the IGP. The contact between the mating surfaces of the clamping mechanism was modeled; nonlinear multi-region contact of surface-surface was applied to establish the contact model of FEA. The constraint of tie was used for modeling thread joint. The simulated results indicated that the smaller area of contact surface, the higher value of stress in the neck of IGP. Electronic measurement was also used to check the results of stress in IGP obtained by FEA. It was found that the experimental data agreed well with simulated results. Based on the numerical analysis and experimental study, the structure of IGP was improved by adopting a smoother double-round neck. The fatigue life of the improved structure was longer than that of the original machine.

scholarly journals A Multiscale Simulation Method and Its Application to Determine the Mechanical Behavior of Heterogeneous Geomaterials

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Shengwei Li ◽  
Heping Xie ◽  
Ru Zhang ◽  
Mingzhong Gao ◽  
Zetian Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Finite Element ◽  
Mechanical Behavior ◽  
Molecular Simulation ◽  
Heterogeneous Material ◽  
Simulation Method ◽  
Multiscale Simulation ◽  
Mechanical Behaviors ◽  
Finite Element Numerical Simulation

To study the micro/mesomechanical behaviors of heterogeneous geomaterials, a multiscale simulation method that combines molecular simulation at the microscale, a mesoscale analysis of polished slices, and finite element numerical simulation is proposed. By processing the mesostructure images obtained from analyzing the polished slices of heterogeneous geomaterials and mapping them onto finite element meshes, a numerical model that more accurately reflects the mesostructures of heterogeneous geomaterials was established by combining the results with the microscale mechanical properties of geomaterials obtained from the molecular simulation. This model was then used to analyze the mechanical behaviors of heterogeneous materials. Because kernstone is a typical heterogeneous material that comprises many types of mineral crystals, it was used for the micro/mesoscale mechanical behavior analysis in this paper using the proposed method. The results suggest that the proposed method can be used to accurately and effectively study the mechanical behaviors of heterogeneous geomaterials at the micro/mesoscales.

scholarly journals The Versatility of Polymeric Materials as Self-Healing Agents for Various Types of Applications: A Review

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1194
Author(s):  
Nik Nur Farisha Nik Md Noordin Kahar ◽  
Azlin Fazlina Osman ◽  
Eid Alosime ◽  
Najihah Arsat ◽  
Nurul Aida Mohammad Azman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polymer Matrix ◽  
Molecular Interaction ◽  
Polymeric Materials ◽  
The Self ◽  
Self Healing ◽  
Vascular Networks ◽  
Intrinsic Mechanism ◽  
Different Types ◽  
External Stimuli

The versatility of polymeric materials as healing agents to prevent any structure failure and their ability to restore their initial mechanical properties has attracted interest from many researchers. Various applications of the self-healing polymeric materials are explored in this paper. The mechanism of self-healing, which includes the extrinsic and intrinsic approaches for each of the applications, is examined. The extrinsic mechanism involves the introduction of external healing agents such as microcapsules and vascular networks into the system. Meanwhile, the intrinsic mechanism refers to the inherent reversibility of the molecular interaction of the polymer matrix, which is triggered by the external stimuli. Both self-healing mechanisms have shown a significant impact on the cracked properties of the damaged sites. This paper also presents the different types of self-healing polymeric materials applied in various applications, which include electronics, coating, aerospace, medicals, and construction fields. It is expected that this review gives a significantly broader idea of self-healing polymeric materials and their healing mechanisms in various types of applications.

Experimental Tensile Study on the Behavior of Composite Material with Roving Waviness

2011 ◽  
Vol 117-119 ◽  
pp. 975-979
Author(s):  
Haider A. F. Almurib ◽  
Haidar Fadhil Al-Qrimli ◽  
Nandha Kumar
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Composite Material ◽  
Tensile Test ◽  
Robotic Arm ◽  
Second Stage ◽  
Straight Bevel Gear ◽  
Different Types ◽  
Experimental Process ◽  
Two Stages

This paper describes the materials and the methods used to make a tensile test of composite materail. The experimental study is conducted to observe the crashing behavior of composite material using different types of material namely; glass/epoxy carbon/epoxy and jute/epoxy specimens. Then, the behavior of the composite specimens is observed to determine the best material that produced the highest mechanical properties to be used as a material for a straight bevel gear in robotic arm application. The experimental work has been divided into two stages. The first stage is the experimental process, which involves fabrication of the specimens for the tensile test. The second stage is the preparation of specimens for the tensil test.

The through Arch Rib Road Bridge Numerical Simulation of Blasting Demolition

2014 ◽  
Vol 533 ◽  
pp. 175-180
Author(s):  
En An Chi ◽  
Chun Ming Xie ◽  
Ming Sheng Zhao ◽  
Jun Yang ◽  
Tie Jun Tao
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Simulation Method ◽  
Design Phase ◽  
Important Means ◽  
Simulation Results ◽  
Concrete Materials ◽  
Structure Collapse ◽  
Concrete Model ◽  
Collapse Process

In order to ensure one through arch rib road bridge blasting demolition will go well, using separate common node reinforced concrete model, numerical simulate the process of bridge collapsed and disintegrate, at the same time, analyze the stress state of steel and concrete unit in detail. The simulation results show that separate common node model could reflect the mechanical properties difference of steel and concrete materials; destruction of the support part of bridge and joint parts reserved , meanwhile, blasting treatment of the joint parts of derrick and arches, also arch center derrick and deck beams, arch springing hinge inside pier reserved on the left, it can ensure the bridge collapsed and broken fully, and can reduce the stack height of bridge collapsed in the river. The research considers that researching on structure collapse process by numerical simulation method not only reappear the process of collapse, but also forecast collapse result in schematic design phase. It will become the important means of study the structure mechanics process of blasting demolition and guide assisted the design of structure blasting demolition, which has important engineering practical value.

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