Aging behavior of aluminum nanopowders: accelerated aging experiments and modeling of the influence of temperature and humidity on the aluminum content

2021 ◽  
Vol 23 (5) ◽  
Author(s):  
D. Laboureur ◽  
G. Glabeke ◽  
J. B. Gouriet
Keyword(s):  
Aluminum Content ◽  
Accelerated Aging ◽  
Aging Behavior ◽  
Influence Of Temperature ◽  
Temperature And Humidity

Lifetime Prediction of Tires with Regard to Oxidative Aging5

2008 ◽  
Vol 36 (1) ◽  
pp. 63-79 ◽  
Author(s):  
L. Nasdala ◽  
Y. Wei ◽  
H. Rothert ◽  
M. Kaliske
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Temperature Distribution ◽  
Superposition Principle ◽  
Accelerated Aging ◽  
Material Model ◽  
Aging Behavior ◽  
Element Analysis ◽  
Material Parameters ◽  
Reaction Processes

Abstract It is a challenging task in the design of automobile tires to predict lifetime and performance on the basis of numerical simulations. Several factors have to be taken into account to correctly estimate the aging behavior. This paper focuses on oxygen reaction processes which, apart from mechanical and thermal aspects, effect the tire durability. The material parameters needed to describe the temperature-dependent oxygen diffusion and reaction processes are derived by means of the time–temperature–superposition principle from modulus profiling tests. These experiments are designed to examine the diffusion-limited oxidation (DLO) effect which occurs when accelerated aging tests are performed. For the cord-reinforced rubber composites, homogenization techniques are adopted to obtain effective material parameters (diffusivities and reaction constants). The selection and arrangement of rubber components influence the temperature distribution and the oxygen penetration depth which impact tire durability. The goal of this paper is to establish a finite element analysis based criterion to predict lifetime with respect to oxidative aging. The finite element analysis is carried out in three stages. First the heat generation rate distribution is calculated using a viscoelastic material model. Then the temperature distribution can be determined. In the third step we evaluate the oxygen distribution or rather the oxygen consumption rate, which is a measure for the tire lifetime. Thus, the aging behavior of different kinds of tires can be compared. Numerical examples show how diffusivities, reaction coefficients, and temperature influence the durability of different tire parts. It is found that due to the DLO effect, some interior parts may age slower even if the temperature is increased.

The influence of temperature and humidity on the sensitivity of torque transducers

Measurement ◽  
2016 ◽  
Vol 94 ◽  
pp. 186-200 ◽  
Author(s):  
K.M. Khaled ◽  
D. Röske ◽  
A.E. Abuelezz ◽  
M.G. El-Sherbiny
Keyword(s):  
Influence Of Temperature ◽  
Temperature And Humidity

scholarly journals Influence of Temperature and Humidity on the Efficacy of Spinosad Against Four Stored-Grain Beetle Species

2008 ◽  
Vol 8 (60) ◽  
pp. 1-9 ◽  
Author(s):  
Christos G. Athanassiou ◽  
Nickolas G. Kavallieratos ◽  
Alcebiades E. Yiatilis ◽  
Basileios J. Vayias ◽  
Constantin S. Mavrotas ◽  
...  
Keyword(s):  
Beetle Species ◽  
Stored Grain ◽  
Influence Of Temperature ◽  
Temperature And Humidity

scholarly journals Influence of Temperature and Humidity on Microbial, Enzymatic, and Physical Changes of Stored, Pickling Cucumbers1

1973 ◽  
Vol 26 (6) ◽  
pp. 943-950
Author(s):  
J. L. Etchells ◽  
T. A. Bell ◽  
R. N. Costilow ◽  
C. E. Hood ◽  
T. E. Anderson
Keyword(s):  
Influence Of Temperature ◽  
Temperature And Humidity ◽  
Physical Changes
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