scholarly journals Based on MATLAB and Adams new pruning cutting edge shape and shear force simulation

2018 ◽  
Vol 175 ◽  
pp. 03065
Author(s):  
Hang Yin ◽  
Zhaoxin Meng ◽  
Yu Zhang ◽  
Bo Yu
Keyword(s):  
Shear Force ◽  
Green Manufacturing ◽  
Cutting Edge ◽  
Shear Mode ◽  
Force Reaction ◽  
Shear Performance ◽  
New Type ◽  
Indispensable Tool ◽  
Save Energy ◽  
Tree Branch

Pruning is an indispensable tool for gardening. The pruning mechanism of pruning scissors and the shape of the cutting edge directly affect the efficiency of shear. Therefore, it is of great significance to design a new type of pruning scissors to improve the efficiency of garden work. It accords with the concept of green manufacturing energy-saving and environmental protection. The blade shape directly affects the shear efficiency. Therefore, the blade of the best Angle can improve the shear efficiency and save energy. According to the motion track of the moving blade and the shear mode. Using MATLAB software to simulate the shape of the blade of the best Angle. This work is instructive to the design of the blade. The force of the blade in the working process of shear force reaction scissors. Using Adams software, the dynamic simulation of tree branch was carried out. It is helpful to verify the shear performance of new pruning shears.

On the Development of a Tangential Clamped-On Chipbreaker for Difficult-to-Machine Materials

1999 ◽  
Author(s):  
Armen L. Airikyan
Keyword(s):  
Cutting Force ◽  
Process Planning ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Cutting Edge ◽  
Cutting Process ◽  
Everyday Practice ◽  
Application Problem ◽  
New Type ◽  
Design And Application

Abstract Everyday practice of cutting process planning requires reliable chipbreacking and this is particularly true when machining difficult-ti-machine materials as austenitic stainless steels. The use of pressed-groove type of chipbreakers prove to provide a partly solution of the problem since their utilization unavoidably leads to increasing cutting force and chipping of the cutting edge. The use of clapped-on chipbreaker seems to solve these problems. However new design and application problem arise. This paper deals with the analysis of these problema and offers a methodology for it resolving. As a result, a new type of a clamped-on chipbreaker has been developed.

scholarly journals Shear Capacity of Open Sandwich Steel Plate-Concrete Composite Slab: Experimental and Analytical Studies

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Lili Wu ◽  
Lipei An ◽  
Jiawei Li
Keyword(s):  
Failure Mode ◽  
Shear Force ◽  
Steel Plate ◽  
Concrete Slab ◽  
Experimental Studies ◽  
Shear Capacity ◽  
Crack Model ◽  
Composite Slab ◽  
Finite Element Software ◽  
Shear Performance

Considering that the fixed crack model by default of the general finite element software was unable to simulate the shear softening behavior of concrete in the actual situation, a rotational crack model based on the modified compression field theory developed by UMAT (user material) of ABAQUS software was proposed and applied to the nonlinear analysis, and a numerical simulated model for the steel-concrete composite slab was built for shear analysis. Experimental studies and numerical analyses were used to investigate the shear load-carrying capacity, deformation, and crack development in steel plate-concrete composite slab, as well as the effects of the shear span ratio and shear stud spacing on the shear performance and the contribution of the steel plate and the concrete to the shear performance. Shear capacity tests were conducted on three open sandwich steel plate-concrete composite slabs and one plain concrete slab without a steel plate. The results indicated that the shear-compression failure mode occurred primarily in the steel plate-concrete composite slab and that the steel plate sustained more than 50% of the total shear force. Because of the combination effect of steel plate, the actual shear force sustained by the concrete in the composite slab was 1.27 to 2.22 times greater than that of the calculated value through the Chinese Design Code for Concrete Structures (GB 50010-2010). Furthermore, the shear capacity of the specimen increases by 37% as the shear stud spacing decreases from 250 mm to 150 mm. By comparing the shear capacity, the overall process of load deformation development, and the failure mode, it was shown that the simulation results corresponded with the experimental results. Furthermore, the numerical simulation model was applied to analyze the influence of some factors on composite slab, and a formula of shear bearing capacity of slab was obtained. The results of the formula agreed with the test result, which could provide references to the design and application of steel plate-concrete composite slab.

New Technologies of Green High Speed Dry Cutting

2012 ◽  
Vol 723 ◽  
pp. 72-76
Author(s):  
Li Zhao ◽  
Pei Quan Guo ◽  
Yan Ke Cao ◽  
Xiao Wei Wang ◽  
Pu Zhang
Keyword(s):  
Development Strategy ◽  
High Speed ◽  
Cutting Tool ◽  
New Technologies ◽  
Green Manufacturing ◽  
Dry Cutting ◽  
Coating Technology ◽  
New Type ◽  
Green Manufacturing Technology ◽  
Important Significance

As a new type of green manufacturing technology, high speed dry cutting technology to implement human sustainable development strategy has important significance. The research reviews the features and advantages of the high speed dry cutting technology, and analyzes the key technologies (including machine tools, cutting tool and coating technology to achieve high-speed dry cutting).

The Application and Evaluation of the Heat Medium Heater in Changqing Oil Field Production

2013 ◽  
Vol 291-294 ◽  
pp. 1653-1656
Author(s):  
Xu Feng Chen ◽  
Cui Hua Zhao ◽  
Jia Ming Zhou ◽  
Hai Jing Shen
Keyword(s):  
Large Scale ◽  
Field Application ◽  
Heating Furnace ◽  
Oil Field ◽  
Field Energy ◽  
Steam Boiler ◽  
Heating Equipment ◽  
Safe Production ◽  
New Type ◽  
Save Energy

As a new type of heating equipment, the heat medium heater furnace overcomes the shortage of the traditional heating methods such as the boiler, heating furnace. Through the comparison and analysis of the field application between the heat medium heater, YQWP - 4000/1.6/220/180-QT, and steam boiler in a central gathering station of Changqing oil field, results indicated: in the condition of 0.3 MPa pressure and 200 °Ctemperature above, the heat medium heater is higher thermal efficiency, more safety and security than steam boiler, and it do not pollute the environment and significantly save energy. One the heat medium heater saves by 982700 RMB than one set of steam boiler per each year. Due to the good economy, heat medium heater is suitable for the heating and heat supply of the large-scale central gathering station in the oil field. Thus, heat medium heater has a good application prospects. And the field application of the heat medium heater provides oil field energy saving and safe production with a certain reference in oil field.

scholarly journals Numerical Simulation and Experimental Analysis of Microstructure of Magnetorheological Fluid

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Dongsheng Ji ◽  
Yiping Luo ◽  
Hongjuan Ren ◽  
Dan Wei ◽  
Jun Shao
Keyword(s):  
Numerical Simulation ◽  
Influencing Factors ◽  
Shear Force ◽  
Magnetic Particles ◽  
Deep Understanding ◽  
Magnetorheological Fluid ◽  
Point Of View ◽  
Macroscopic Properties ◽  
New Type ◽  
Numerical Calculation Method

Magnetorheological fluid is a new type of smart material that is sensitive to magnetic fields and has controllable performance. It is widely regarded for its unique magnetorheological effect and good rheological properties. For materials, the microstructure determines its macroscopic properties. In order to better study its macroscopic properties, it is necessary to have a more comprehensive understanding and deep understanding of its microstructure. In this paper, the magnetization process of magnetorheological fluid is analyzed from a microscopic point of view. Based on Newton’s second law, the dynamic model of particle motion is established. The magnetic force, repulsive force, and viscous resistance of magnetic particles are analyzed. The finite difference numerical calculation method is used. The velocity-Verlet algorithm simulates the static microstructure chaining process of the magnetorheological fluid and the dynamic chaining process under shear force under different influencing factors. At the same time, a static observation device and a shear observation device were developed to observe the microstructure chaining morphology of magnetorheological fluid under different influencing factors, and to study the dynamic chaining law of magnetorheological fluid under the action of a shear force. Therefore, a reasonable contrast index is established, and the numerical simulation results are compared with the experimental observation results.

Integrated Dynamic Characteristics and Application in Semi-Active Dynamic Absorber of Magneto-Rheological Fluids

2012 ◽  
Vol 220-223 ◽  
pp. 601-606
Author(s):  
Shi Zhen Li ◽  
Gong Yu Li ◽  
Xiao Wu Kong ◽  
Jian Hua Wei
Keyword(s):  
Natural Frequency ◽  
Dynamic Characteristics ◽  
Damping Ratio ◽  
Dynamic Test ◽  
Shear Mode ◽  
Vibration Absorption ◽  
New Type ◽  
Dynamic Absorber ◽  
Magneto Rheological ◽  
Squeeze Effect

As a new type of controllable rheological smart material, Magneto-rheological Fluids (MRF) are widely used in the field of vibration control. This article investigated their integrated dynamic characteristics in squeeze mode and shear mode. Two prototypes were designed and fabricated. The dynamic test for the two prototypes was performed on a simply supported beam vibrating device with the methods of drop-hammering and sweep-frequency measuring. The experimental results demonstrate that the damping ratio of the prototype in squeeze effect presents linearly and widely controllable from 0.0948 to 0.2268 with the increase of the coils’ excitation current, behaving as a variable MR damper. However, its natural frequency remains unchanged. It is also shown that the natural frequency of the prototype in shear effect increases significantly from 18Hz to 24 Hz, acting as a semi-active dynamic vibration (SDVA) absorber with broadband vibration absorption for the maximum attenuation of up to 74.3%. This study provides guidance for engineering applications of MRF.

Shear Strength of Concrete and Gypsum Composite Walls

2013 ◽  
Vol 368-370 ◽  
pp. 976-983 ◽  
Author(s):  
Kang Liu
Keyword(s):  
Shear Strength ◽  
Glass Fiber ◽  
Shear Failure ◽  
Design Procedure ◽  
Green Product ◽  
Ultimate Shear Strength ◽  
Glass Fiber Reinforced ◽  
Shear Performance ◽  
Save Energy ◽  
Composite Walls

Gypsum walls are a green product that helps to save energy and protect the environment. This paper investigates the shear strength of glass fiber reinforced gypsum (GFRG) walls fully or partially filled with concrete in the hollow cores. Eight full scale GFRG walls were tested. The shear performance of the tested walls, including the shear failure mode, hysteresis responses, the ultimate shear strength were studied in the paper. A design procedure for the shear strength of the concrete filled GFRG walls is developed.

scholarly journals Assessment of water-based cutting fluids with green additives in broaching

Friction ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 1051-1062 ◽  
Author(s):  
Jing Ni ◽  
Kai Feng ◽  
Lihua He ◽  
Xiaofan Liu ◽  
Zhen Meng
Keyword(s):  
Castor Oil ◽  
Linear Alkylbenzene Sulfonate ◽  
Green Manufacturing ◽  
Cutting Edge ◽  
Cutting Fluid ◽  
Cutting Fluids ◽  
Linear Alkylbenzene ◽  
Oil In Water ◽  
Water Based ◽  
Alkylbenzene Sulfonate

Abstract In order to improve the cutting performance in broaching, the lubrication and cleaning effects offered by water-based cutting fluids with green additives need to be studied from the viewpoint of green manufacturing. Therefore, water-based solutions with castor oil, surfactant (linear alkylbenzene sulfonate, LAS), and nanographite were prepared by ultrasonic agitation and sprayed into the zone of broaching via atomization. The performances of the cutting fluids, in terms of the viscosity, specific heat, wetting angle, and droplet size, were evaluated to discuss their effects on the broaching load. Among the fluids, the addition of LAS into oil-in-water (WO-S), where its cutting fluid with 10 wt.% castor oil and 1.5 wt.% surfactant, exhibited the lowest broaching force. With regard to the lubricating and cleaning mechanisms, WO-S has good wettability and permeability, and hence, can lubricate the cutting edge of the tool to decrease the cutting load, cool the cutting edge to keep it sturdy, and clean the surface of the cutting edge to keep it sharp. The results reveal that the simultaneous addition of castor oil and LAS had remarkable effects on the lubrication and cleaning, and resulted in a broaching load reduction of more than 10% compared to commercial cutting fluids. However, the addition of nanographite could not improve the lubrication owing to its agglomeration.

Celebrity capitalism

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
James Andrew Robertson
Keyword(s):  
Case Studies ◽  
Reading Time ◽  
Cutting Edge ◽  
Content Type ◽  
New Type ◽  
Pertinent Information ◽  
Practical Implications

Purpose: This paper aims to review the latest management developments across the globe and pinpoint practical implications from cutting-edge research and case studies. Design: This briefing is prepared by an independent writer who adds their own impartial comments and places the articles in context. Findings: Celebrity CEOs are a new type of celebrity able to profoundly impact their own companies and brands just through their personal actions, in ways previous CEOs have not been able to do. Originality: The briefing saves busy executives, strategists and researchers hours of reading time by selecting only the very best, most pertinent information and presenting it in a condensed and easy-to-digest format.

scholarly journals Verification of the shear performance of mortise and tenon joints with top and bottom notches at the beam end

2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Shigefumi Okamoto ◽  
Makoto Nakatani ◽  
Nobuhiko Akiyama ◽  
Kei Tanaka ◽  
Takuro Mori
Keyword(s):  
Calculation Method ◽  
Shear Force ◽  
Structural Performance ◽  
Clamping Force ◽  
Shear Forces ◽  
Splitting Strength ◽  
Moment Resisting ◽  
Shear Performance ◽  
Rotational Deformation ◽  
Mortise And Tenon

AbstractShear experiments on mortise and tenon joints with top and bottom notches in the beam end were conducted with the length of the tenon as a variable. In addition, material experiments were performed to investigate the structural performance of the fracture modes of the joint. The experimental results show that when the lower notch at the beam end experiences splitting, the shear forces were identical for different tenon lengths and did not decrease. In addition, the deformation performance of the joint up to yielding was largely due to the compressive deformation perpendicular to the grain of the wood on the sides of the tenon. Based on the theory of the calculation method of the splitting strength of a notched beam, a formula for the splitting strength when the end of the beam is moment-resisting was proposed. It was confirmed that the proposed formula could estimate the shear force that caused the splitting fracture of the lower notch. In addition, the increase in shear force after the lower notch experienced splitting fracture was due to the increase in clamping force of the beam end due to rotational deformation.

Sign in / Sign up

Export Citation Format

Share Document