Numerical simulation for deformation of laminates combining the novel shell element with the decoupled two-scale viscoelastic analysis of FRP

2021 ◽  
pp. 111236
Author(s):  
Takeki Yamamoto ◽  
Tomonaga Okabe ◽  
Kenjiro Terada
Keyword(s):  
Numerical Simulation ◽  
Shell Element ◽  
The Novel ◽  
Viscoelastic Analysis

Study on Bi-Stable Behaviors of Isotropic Shell Structures and Numerical Simulation

2010 ◽  
Vol 168-170 ◽  
pp. 341-344
Author(s):  
Yao Peng Wu
Keyword(s):  
Numerical Simulation ◽  
Boundary Effect ◽  
Stable Process ◽  
Stable State ◽  
Shell Element ◽  
Stable Model ◽  
Stable States ◽  
Isotropic Shell ◽  
Abaqus Code ◽  
Two Parameters

Bi-stable structure can be stable in both its extended and coiled forms. For the elastic isotropic shell, a theoretical model in terms of only two parameters is proposed. Based on the principle of minimum potential energy, the conditions for bi-stability of isotropic shell are derived. The results indicate that, a pre-stressed shell will have its two stable states if the acting pre-stress satisfies some confined conditions. Further, the bi-stable model is improved taking into account boundary effect of the shell. The results show the rolled-up radius for the second stable state becomes larger. Meanwhile, using shell element in ABAQUS code, numerical simulation on bi-stable process is carried out. The numerical results of rolled-up radius characterizing the bi-stability agree well with the predicted results.

Warehousing operation optimization model of one storey new dangerous goods warehouse based on warehousing chain and its application

2020 ◽  
Vol 01 ◽  
Author(s):  
Xiaguang Li ◽  
Xiefang Lin ◽  
Fangwei Zhang ◽  
Xufeng Tang ◽  
Ruolin Qiu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Evaluation Model ◽  
Optimal Solution ◽  
The Novel ◽  
Allocation Model ◽  
Scheduling Scheme ◽  
Dangerous Goods ◽  
Novel Theory ◽  
Time Optimal ◽  
Scheme Evaluation

Introduction: In order to ensure the efficiency and cost of dangerous goods warehouse under the premise of safety, this study takes the dangerous goods warehouse as the research object and implements multitask for dangerous goods warehouse with two forklifts. Methods: This study takes traversal calculation, novel safety calculation formula and scheduling scheme evaluation model as tools to research the forklift scheduling scheme of one-stoery packed dangerous goods warehouse. Results: Optimal scheme and allocation decision model are obtained through numerical simulation. The innovation of this study is giving the safety formula of forklift operation in dangerous goods warehouse and using numerical simulation to obtain the global optimal solution. Furthermore, this study draws on the concept of travel chain to propose the idea of warehousing chain. At the same time, optimal schemes for multiple dangerous goods inbound and outbound the warehouse are studied. Conclusion: With the application of actual data in Shanghai Lingang dangerous goods warehouse, this study combines with the simulation technology to verify the allocation model of warehousing operations and forklift scheduling model. The validity and feasibility of the novel theory are also verified.

Numerical simulation of dynamic pressures on a novel drafting system and experimental study on yarn properties based on friction fields

2021 ◽  
pp. 004051752110460
Author(s):  
Jing Quan ◽  
Longdi Cheng ◽  
Jianyong Yu ◽  
Wenliang Xue
Keyword(s):  
Numerical Simulation ◽  
Pressure Distribution ◽  
Friction Force ◽  
Dynamic Pressure ◽  
Experimental Studies ◽  
The Novel ◽  
Friction Forces ◽  
Pressure Distributions ◽  
Significant Difference ◽  
Pressure Peak

The friction fields of a novel drafting device based on the ring spinning frame are investigated in terms of numerical simulation and experimental studies. In numerical simulation, the results demonstrate that the dynamic pressure distribution in the drafting zone is presented in the form of wave undulation in the main drafting zone. Besides this, the pressure peak greatly increases close to the front nip. The effect of different spacers and middle roller speeds on the pressure distribution was also simulated, which indicates that the dynamic pressure decreases strictly with increasing spacer size, while at middle roller speeds of 0.18 rad/s and 0.26 rad/s the pressure distributions only show a significant difference at the pins nip and not throughout the drafting zone. For experimental studies, the friction fields of the novel drafting device were tested with different spacers. The peaks of the friction field decrease with the increasing spacing in the main drafting zone. The friction force shows a wavy undulation in the direction of the middle roller nip to the front roller nip, and there is also a great increase in the peak of the friction force near the front roller nip. Analysis of the properties of the three yarns spun by the novel draft device under different spacers shows that changing the spacer affects the friction forces of the drafting zone and has a significant effect on the yarn evenness, imperfections, and strength, but not on the hairiness.

A Novel PNIN Barrier Controlled Tunnel FET

2015 ◽  
Vol 1096 ◽  
pp. 497-502 ◽  
Author(s):  
Hao Wang ◽  
Sheng Chang ◽  
Qi Jun Huang ◽  
Jin He
Keyword(s):  
Numerical Simulation ◽  
Carbon Nanotube ◽  
Device Performance ◽  
The Novel ◽  
Tunnel Current ◽  
Tunnel Fet ◽  
Novel Structure ◽  
Channel Potential ◽  
Non Equilibrium Green’S Function ◽  
Gate Work Function

A novel structure of barrier controlled tunnel FET is proposed in the paper. The principles of gate work function engineering and channel doping engineering are combined to form up an in channel potential barrier, which can tune the source to drain tunnel current. The proposed structure serves as an alternative solution of barrier controlled tunnel FET fabrication, which combines the merits of the barrier controlled traditional MOSFET device and the bandgap controlled tunnel device. With carbon nanotube as the channel material, the device performance of the novel structure is verified using numerical simulation under the non-equilibrium Green’s function framework.

scholarly journals Numerical Simulation and Parametric Analysis of Precast Concrete Beam-Slab Assembly Based on Layered Shell Elements

Buildings ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 7
Author(s):  
De-Cheng Feng ◽  
Cheng-Zhuo Xiong ◽  
Emanuele Brunesi ◽  
Fulvio Parisi ◽  
Gang Wu
Keyword(s):  
Numerical Simulation ◽  
Precast Concrete ◽  
Shell Element ◽  
Simulation Method ◽  
Layered Shell ◽  
Shell Elements ◽  
Slab Width ◽  
Numerical Studies ◽  
Hysteretic Performance ◽  
Energy Dissipation Capacity

Precast concrete (PC) plays an important role in the industrialization processes of buildings, so it is critical to study the seismic performance of such structures. Several experimental and numerical studies have been conducted to investigate the behavior of PC beam-to-column connections. However, most of the previous studies neglect the contribution of slabs. In light of this, this paper presents a numerical simulation method for dry connected beam-slab assemblies based on the layered shell element available in OpenSees. The beams were modeled with fiber elements, while the slabs were modeled with layered shell elements. The developed model was validated by simulating a typical beam-slab assembly test, with the characteristics of hysteretic performance found to be well reflected by the model. Moreover, a parametric study was performed to quantify the influence of slab parameters. The results showed that the thickness of the slab had a significant effect on the hysteretic performance of the specimen and that the influence of the slab width was obviously reduced after it exceeded a certain limit. Besides, the effect of the reinforcement ratio on stiffness and loadbearing capacity was not obvious and was accompanied by a slight positive correlation with the energy dissipation capacity.

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