Influence of Temperature on Impact Sensitivity of Matchhead Composition while in Contact with Different Process Materials

2019 ◽  
Vol 969 ◽  
pp. 55-61
Author(s):  
S.P. Sivapirakasham ◽  
K. Harisivasri Phanindra ◽  
Mahadevan Surianarayanan ◽  
K.R. Balasubramanian
Keyword(s):  
Critical Temperature ◽  
Steel Surface ◽  
Research Work ◽  
Impact Sensitivity ◽  
Process Safety ◽  
Contact Materials ◽  
Influence Of Temperature ◽  
Ambient Temperature Condition ◽  
Influence Of Temperature On ◽  
The Impact

This research work aims to understand the influence of temperature (upto 80°C) on the impact sensitivity of matchhead composition with various process contact materials (Steel, aluminium, brass) and to find out the critical temperature for process safety. The BAM fall hammer was modified with a heating element for the measurement of impact sensitivity. The Limiting Impact Energy (LIE) at ambient temperature condition with steel surface on the top and bottom was found to be 3.73J. The lowest critical temperature was found to be 60.14°C for the matchhead composition when it is in contact with steel, which was used as the contact material for both top and bottom.

Influence of Different In-Process and Building Materials with Varying Hardness on Impact Sensitivity of the Matchhead Composition

2019 ◽  
Vol 969 ◽  
pp. 41-47
Author(s):  
S.P. Sivapirakasam ◽  
K. Harisivasri Phanindra ◽  
Mahadevan Surianarayanan ◽  
K.R. Balasubramanian
Keyword(s):  
Impact Energy ◽  
Building Materials ◽  
Research Work ◽  
Impact Sensitivity ◽  
Contact Material ◽  
Contact Materials ◽  
Limited Impact ◽  
The Impact ◽  
Process Material

The objective of this research work is to study the influence of different in-process contact materials (steel, aluminium and brass) and building contact materials (concrete and wood), and its hardness on the impact sensitivity of matchhead composition. The BAM fall hammer was used for measurement of impact sensitivity. The result demonstrated that the in-process and building contact materials, and its hardness imparted variation to the sensitivity between 3.33J and 15.892J. The least LIE was found at 3.33J for the steel at 115 HRB and 117 HRB; 3.72J for aluminium at 53 HRB; 4.7J for brass at 82 HRB; 12.16J for concrete at 35 RHN, and 13.14J for wood at 16 HRB. The limited impact energy was lowest when there was contact between steel and steel as in-process material and contact between concrete and concrete as building contact material. The impact sensitivity was higher for material with higher hardness for all building and in-process contact materials. Brass and wood is suggested to be used as process and building materials in order to reduce the risk of explosions due to impact sensitivity.

scholarly journals The Influence of Temperature on Changes in the Distinguishing Features of the Usable Quality of Soybean Meal

2018 ◽  
Vol 1 (1) ◽  
pp. 377-383
Author(s):  
Beata Drzewieniecka ◽  
Jan Drzewieniecki ◽  
Miroslav Blatnický
Keyword(s):  
Fatty Acid ◽  
Soybean Meal ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Transport Processes ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
The Impact ◽  
Distinguishing Features

Abstract Soybean meal is one of the fodder components. It is a by-product of the production of soybean oil. Soybean meal is a specific cargo due to changes that may occur in it during transport processes. These changes are subject to many distinguishing features of usable quality inter alia fat and fatty acid content. The temperature and size of the soybean meal particles are among the factors influencing the transformations. The article presents the results of research on soybean meal and its individual fractions and the impact of selected indicators on the quality changes of this cargo. The results depend on the conditions corresponding to those that occur during the storage, handling and transport processes. The dependencies between them have been determined. The performed research allowed to determine the type and scope of changes taking place in this cargo under the influence of temperature. The results of the study showed that as the temperature rises, the fatty acid content in the soybean meal decreased during storage for a given period of 30 days.

scholarly journals INFLUENCE OF TEMPERATURE AND LOADING PROGRAM ON THE FATIGUE LIFE OF STEEL P91

2013 ◽  
Vol 7 (2) ◽  
pp. 93-98
Author(s):  
Stanisław Mroziński ◽  
Michał Piotrowski
Keyword(s):  
Fatigue Life ◽  
Fatigue Testing ◽  
Low Cycle Fatigue ◽  
Test Results ◽  
Influence Of Temperature ◽  
Program Type ◽  
Influence Of Temperature On ◽  
Two Temperatures ◽  
A Minor ◽  
The Impact

Abstract In this paper there are shown the results of low-cycle fatigue testing of steel P91 samples. During the testing there was conducted a fixed amplitude loading testing as well as programmed loading with various sequence degrees of the program. The testing was done in two temperatures: T=20°C and T=600°C. During the testing a cyclic steel weakening was observed without a clear period of stabilization. Greater changes of the cyclic properties were observed in temperature T=600°C. The influence of temperature on the fatigue life was determined in this paper. This influence is dependent on the degree of strain. It’s a minor one in the range of big strain and increases in the process of decreasing the degree of strain. Furthermore, the impact of the loading program type was determined on the test results and fatigue life calculations

scholarly journals Influence of temperature and rainfalls on the number of visitors in the National Park "Tara"

2015 ◽  
pp. 97-120
Author(s):  
Nenad Rankovic ◽  
Zoran Poduska ◽  
Jelena Nedeljkovic ◽  
Dragan Nonic
Keyword(s):  
National Parks ◽  
National Park ◽  
Climate Changes ◽  
Forest Ecosystems ◽  
Negative Influence ◽  
Influence Of Temperature ◽  
Exponential Regression ◽  
Temperature And Precipitation ◽  
Influence Of Temperature On ◽  
The Impact

The paper is based on the assumption that climate changes, in addition to negatively affecting forest ecosystems, can have an impact on visiting sites in national parks intended for tourism and recreation. In order to test this assumption, data on the number and frequency of visits to the National Park ?Tara? were collected. In the research was determined a mean daily temperature and total amount of rainfalls in the days when the visit was recorded. These data were analyzed using exponential regression models. There is a positive and statistically significant influence of temperature on the number of visits to the National Park ?Tara? in certain categories. On the other hand, rainfalls have a negative influence on visits to the National Park ?Tara?. These analyses are compared with scenarios of climate changes in Serbia (A1B and A2). It was concluded that there is the influence of temperature and precipitation on the number of visitors to the National Park ?Tara?, and that one can expect changes in visits due to the impact of climate changes on temperature, rainfalls and forest ecosystems.

The Influence of Temperature on Toughness of PA6/POE-G-MAH/OMMT Blends

2012 ◽  
Vol 217-219 ◽  
pp. 630-633
Author(s):  
You Wen ◽  
Yu Zhu Xiong ◽  
Jun Xu ◽  
Cai Juan Huang
Keyword(s):  
Plastic Deformation ◽  
Glass Transition ◽  
Transition Temperature ◽  
Impact Strength ◽  
Influence Of Temperature ◽  
C 23 ◽  
Influence Of Temperature On ◽  
State Changes ◽  
Stress Whitening ◽  
The Impact

Composite materials of POE-g-MAH，OMMT and PA6 were prepared by blending technology. Thermodynamic performances of PA6/POE-g-MAH/OMMT were determined in different temperature by SEM, TEM and XRD. The experimental results indicate that the notched impact strength of bends with the same component gradually increases as temperature increases in the range of -37 °C-23°C ,and with POE-g-MAH/OMMT content increasing, the impact strength keeps rising and stress whitening occurs; But at 50°C, higher than the glass transition temperature of PA6/POE-g-MAH/OMMT , plastic deformation begins easily and strongly. Because POE-g-MAH to a certain content, the stress state changes from plane strain to plane stress, make the ability of plastic deformation increasing .The plastic deformation absorbs many impact energy, and make the stress whitening phenomenon.

Mathematical modeling and assessment of barrier measures and temperature on the transmission and persistence of Novel coronavirus disease 2019 (COVID-19)

2021 ◽  
Author(s):  
Ezekiel Dangbé ◽  
Antoine Perasso ◽  
Damakoa Irépran
Keyword(s):  
World Health ◽  
Influence Of Temperature ◽  
Global Pandemic ◽  
Autonomous Case ◽  
The World ◽  
Influence Of Temperature On ◽  
Coronavirus Infection ◽  
Novel Coronavirus ◽  
Health Organization ◽  
The Impact

In December 2019, human cases of novel coronavirus infection were detected in Wuhan, China which have been named as COVID-19 by the World Health Organization (WHO). Since COVID-19 was first detected in China, the virus has reached more than 120 countries and was declared a global pandemic on March 11, 2020 by the WHO. In this paper, we have highlighted the influence of temperature on the spread of COVID-19. For this, the dynamic transmission of COVID-19 is modeled taking into account the influence of the temperature on the persistence of coronavirus in the environment. We also took into account the impact of proportion of people who respect the barrier measures published by the WHO on the scale of the COVID-19 pandemic. Taking into account the influence of the temperature on the persistence of the virus in the environment, the dynamic transmission has been described by a system of ordinary differential equations (ODEs). First, we analyzed the solutions of system in the case where the impact of the temperature on the virus is neglected. Second, we carried out the mathematical analysis of the solutions of the system in the non-autonomous case. Mathematical analyzes have enabled us to establish that the temperature and proportion of persons who respect the barrier rules can affect the spread of COVID-19. Some numerical simulations have been proposed to illustrate the behavior of the pandemic in some countries.

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