The Optimized Design of Manufacturing Process of Shrub Scrimber

2013 ◽  
Vol 712-715 ◽  
pp. 597-600
Author(s):  
Yan Fang Li ◽  
Ying Cheng Hu ◽  
Li Zhang ◽  
Jia Yao ◽  
Jie Yuan
Keyword(s):  
Mechanical Properties ◽  
Manufacturing Process ◽  
Orthogonal Experiment ◽  
Flexural Vibration ◽  
Dynamic Mechanical Properties ◽  
Optimized Design ◽  
Static Mechanical ◽  
Flexural Vibration Test ◽  
Natural Wood ◽  
Nondestructive Testing Method

In this study, the optimized manufacturing process of Shrub Scrimber has been researched by using orthogonal experiment. The dynamic mechanical properties of Shrub Scrimber were measured by Fast Fourier Transform (FFT) nondestructive testing method, and the reliability of this method was verified by the linear regression between the static mechanical properties and the dynamic one. The results showed that shrub Scrimber had excellent mechanical properties, and can be used as structure replaced natural wood. The flexural vibration test were confirmed reliable to predict the mechanical properties of Shrub Scrimber.

EFFECT OF CARBON BLACK NATURE ON DYNAMIC MECHANICAL PROPERTIES AND REINFORCEMENT OF NR VULCANIZATION BY LATEX TECHNIQUES

2017 ◽  
Vol 90 (4) ◽  
pp. 611-620
Author(s):  
An Dong ◽  
Zhang Zhiyi ◽  
Jia Haixiang ◽  
Shou Jinquan ◽  
Zhang Huan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Dynamic Mechanical Properties ◽  
Mixing Process ◽  
Scanning Electron Micrograph ◽  
Dynamic Mechanical ◽  
Unit Operations ◽  
New Process ◽  
Static Mechanical ◽  
Filler Dispersion

ABSTRACT The influence of the structure and size of carbon black on the static mechanical and dynamic mechanical properties of filled natural rubber (NR) compounds is investigated in detail. A new process for the production of carbon black master batches with enhanced mechanical properties has been developed. The unit operations in the process are the preparation of carbon black slurry in the presence of a suitable surfactant, addition of the slurry to the fresh NR latex under stirring, coagulation of the mixture by the addition of acid, dewatering of the coagulum, and drying to obtain carbon black–incorporated NR. The competence of the new technique is established by comparing the characteristics of the carbon black–incorporated NR by the mill mixing process (control). The mechanical properties, including tensile strength, modulus, tear strength, and hardness, are superior for the vulcanization prepared by the latex-suspension coagulation techniques. The improvement shown by the vulcanization prepared by the latex-suspension coagulation techniques was attributed to the better filler dispersion evidenced from the scanning electron micrograph along with the attainment of a higher level of vulcanization.

Characteristics Analysis of Coir Fiber and Performance Evaluation of Coir Fiberboard

2010 ◽  
Vol 146-147 ◽  
pp. 1549-1552
Author(s):  
Jia Yao ◽  
Ying Cheng Hu ◽  
Wei Lu ◽  
Jin Li
Keyword(s):  
Mechanical Properties ◽  
Nondestructive Testing ◽  
Orthogonal Experiment ◽  
Surface Characteristics ◽  
Dynamic Mechanical Properties ◽  
National Standards ◽  
Coir Fiber ◽  
Static Test ◽  
Characteristics Analysis ◽  
And Performance

SEM observations of coir fiber microstructure have been carried out. Uneven surface characteristics are conducive to the bonding between coir fibers and resin materials. The unique advantages of coir fiber have been verified. Doing orthogonal experiment design for coir fiberboard, the coir fiberboard can meet the mechanical properties of National Standards of China. The various factors optimization plan on the performance of coir fiberboard has been obtained. FFT nondestructive testing has been done for the coir fiberboard. Nondestructive testing results show that the good correlation exists between dynamic mechanical properties and the static test results.

scholarly journals Experimental Study on the Damage Characteristics of Polymer Slabs Subjected to Air Contact and Close-In Explosions

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Zhidong Liu ◽  
Xiaohua Zhao ◽  
Hongyuan Fang ◽  
Xueming Du ◽  
Binghan Xue ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shock Wave ◽  
Failure Mode ◽  
Explosive Charge ◽  
Time History ◽  
Dynamic Mechanical Properties ◽  
Charge Weight ◽  
Pressure Time ◽  
Static Mechanical ◽  
Air Explosion

As a new antiseepage reinforcement material, polyurethane grouting material has been widely studied in terms of its static mechanical properties. However, research on its dynamic mechanical properties is relatively rare. In this research, considering the influence of the explosive charge weight, the air contact and close-in explosion experiments of polymer slabs were carried out. The failure mode and damage spatial distribution characteristics of polymer slabs were explored. Pressure time history curve of air shock wave was obtained using an air shock wave tester. The influence of polymer slabs on the propagation of air explosion shock wave was compared and analyzed. The results show that, under the air contact explosion, the polymer slab mainly suffers local damage, while under close-in explosion, overall damage is the main damage mode. With the increase of the explosive charge weight, the failure mode of the polymer slab transits from surface crack and slight spalling to local and whole crushing.

Production Process and Nondestructive Testing of Soybean Stalks Particleboard

2012 ◽  
Vol 430-432 ◽  
pp. 1339-1342
Author(s):  
Wei Lu ◽  
Jia Yao ◽  
Ping Han ◽  
Wan Jiang Wu ◽  
Chuang Liu
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
Time Distribution ◽  
Process Analysis ◽  
Orthogonal Experiment ◽  
Flexural Vibration ◽  
Modulus Of Rupture ◽  
Process Conditions ◽  
Pressing Temperature ◽  
Pressing Time

Orthogonal experiment of four factor and three level has been adopted, through the process analysis of the various factors on mechanical properties, the best process conditions of soybean stalks particleboard are chosen as: density is 0.7g/cm3, glue content is 12%, and hot pressing time distribution is 3+4 minutes, hot pressing temperature is 175°C. The Ef (the dynamic elastic modulus of NDT) of soybean stalks particleboard has been examined by flexural vibration method of FFT(Fast Fourier Transform), the regression between Ef and MOE(modulus of elasticity), MOR(modulus of rupture) is significant and existing high relevance degree, so using FFT method for NDT of composite materials is feasible.

The Effect of Heat Treatment on Static and Dynamic Mechanical Properties of Rapidly Solidified and Plastically Consolidated RS442 Aluminium Alloy

2015 ◽  
Vol 641 ◽  
pp. 17-23
Author(s):  
Maciej Motyka ◽  
Tomasz Tokarski ◽  
Waldemar Ziaja ◽  
Mateusz Wedrychowicz
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminium Alloy ◽  
Bending Strength ◽  
Fatigue Behaviour ◽  
Extrusion Process ◽  
Dynamic Mechanical Properties ◽  
Static Mechanical ◽  
Rapidly Solidified ◽  
Static Mechanical Properties

Ultra-fine grained metallic materials are characterized by higher mechanical properties comparing with their conventional equivalents. However increase in strength under static load is not always accompanied by improved fatigue behaviour. Previous investigations on submicrocrystalline RS442 aluminium alloy produced by plastic consolidation of rapidly solidified flakes in the extrusion process revealed increase in its high cycle fatigue bending strength caused by annealing at 450°C. The aim of present studies was to evaluate the influence of heat treatment – also precipitation hardening – on static mechanical properties (hardness, tensile and yield strength) and fatigue strength of the alloy determined in high cycle stress controlled bending tests. Correlation between microstructure, static mechanical properties and fatigue behaviour was analyzed too.

Effect of Sisal Fibre Hybridisation on Static and Dynamic Mechanical Properties of Corn/Sisal/Polylactide Composites

2017 ◽  
Vol 25 (6) ◽  
pp. 463-470 ◽  
Author(s):  
Honglin Luo ◽  
Dehui Ji ◽  
Guangyao Xiong ◽  
Lingling Xiong ◽  
Chuanyin Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hybrid Composites ◽  
Dynamic Mechanical Properties ◽  
Peak Height ◽  
Sisal Fibre ◽  
Dynamic Mechanical ◽  
Static Mechanical ◽  
Tan Δ ◽  
First Time ◽  
Static Mechanical Properties

The relatively poor mechanical properties of corn fibre (CF) and its green composites have hindered its applications. In this work, sisal fibre (SF) was hybridised with CF to reinforce polylactide (PLA) composites (CF/SF/PLA). The static mechanical properties such as tensile, flexural and impact strengths and dynamic mechanical properties such as storage modulus (E’), damping behaviour (tan δ), glass transition temperature (Tg) of the hybrid composites were determined and, for the first time, hybrid effects on both static and dynamic mechanical properties were evaluated. It is found that the tensile, flexural, impact strengths, and E’ and tan δ peak height, as well as the hybrid effects change with hybrid ratio (SF:CF). It is demonstrated that a hybrid composite with desirable static and dynamic mechanical properties can be produced by optimising the fibre:hybrid ratio.

scholarly journals Static and dynamic mechanical behavior of doum palm (Hyphaene thebaica) nut reinforced HDPE composites

2021 ◽  
Vol 40 (4) ◽  
pp. 639-647
Author(s):  
A.A. Alabi ◽  
A.I. Obi ◽  
D.M. Kulla ◽  
S.M. Tahir
Keyword(s):  
Mechanical Properties ◽  
Dynamic Mechanical Properties ◽  
Particle Sizes ◽  
Load Bearing Capacity ◽  
Palm Fruit ◽  
Environmental Friendliness ◽  
Dynamic Mechanical ◽  
Dynamic Mechanical Behavior ◽  
Static Mechanical ◽  
Static Mechanical Properties

The quest to discover more and to enhance the qualities of agro-residue for use as natural reinforcement of polymers continues to attract the attention of researchers because of the environmental friendliness. Hyphaene thebaica also known as doum palm is a fruit tree native to the Nile in Egypt and found in abundance in many parts of Africa. Doum palm fruit contains probably the hardest and toughest known nut. The doum palm nuts (DPN) are the most under-used hard-nut despite their abundance in nature. This study presents the potential doum palm nut particles (DPNp) as natural reinforcement for high density polyethylene (HDPE). Properties of DPN such as density, hardness and weight loss due to heating were determined. HDPE/DPNp composites were produced by reinforcing HDPE with 30, 35, 40 and 45% DPNp particles of two different sizes. The particle sizes 600 μm and 710 μm led to classifying the composites as X-composite and Y-composite respectively. The static and dynamic mechanical properties of the composites were determined and compared with the those of pure HDPE. Results showed that HDPE and DPNp can be formed into light and attractive components. Loading HPDE with DPNp significantly improve static mechanical properties of HDPE such as tensile strength, hardness, stiffness and resistance to impact failure by 50%, 200%, 800% and 1500% respectively. The HDPE/DPNp composites also had better dynamic mechanical properties. The ability of the composites to maintain load bearing capacity under dynamic conditions was superior to that of HDPE.

Dynamic Mechanical Properties of Sugarcane

2013 ◽  
Vol 811 ◽  
pp. 314-318
Author(s):  
Jan Džugan ◽  
Martina Maresova ◽  
Pavel Podany
Keyword(s):  
Mechanical Properties ◽  
Dynamic Loading ◽  
Dynamic Mechanical Properties ◽  
Recent Time ◽  
Optimized Design ◽  
Material Optimization ◽  
New Material ◽  
Service Conditions ◽  
Increasing Demand

New design of a sugarcane shredder is being performed within a research project. This kind of equipment used to be traditionally designed on the basis experiences up to recent time. With increasing demand for the material economic utilization and reliable service, new material optimized design of shredders is required. In order to be able to perform qualified design and material optimization, service conditions has to be known. The paper is dealing with determination of sugarcane mechanical properties under dynamic loading, as the shredding process is performed at high velocities in the range of several meters per second. The mechanical properties of the sugarcane are going to be subsequently used for calculation of in operation loading on shredder components in the further steps.

Study on Shape-Memory Mechanism and Properties of NR/TPI Blends

2013 ◽  
Vol 467 ◽  
pp. 146-151 ◽  
Author(s):  
Guang Yi Lin ◽  
Shu Ming Liu ◽  
Fang Chen Dong
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Memory Performance ◽  
Dynamic Mechanical Properties ◽  
Memory Mechanism ◽  
Static Mechanical ◽  
Addition Level ◽  
Shape Fixity ◽  
Static Mechanical Properties

Crystalline grains of TPI distribute in NR/TPI blends in the role of physical crosslinking points and make up for deficiencies of the NR/TPI blending system. The flexibility and strength have been enhanced significantly by increasing the the addition level of TPI. The NR/TPI vulcanizates containing 30% of TPI were found to show the recovery rate of 99.4%, while the shape fixity was close to 100%. The study indicated that the recovery rates of NR/TPI vulcanizates depended to a large extent on the addition level of TPI. The influence of the addition level of TPI on the micro-structure of NR/TPI blends was investigated. In addition, the effects of TPI content on static mechanical properties, dynamic mechanical properties, shape-memory performance and cure characteristics of NR/TPI blends were also discussed.

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