Effects of Temperature Fluctuation on the Creep Properties in Bending of a Linear Viscoelastic Column

1967 ◽  
Vol 16 (162) ◽  
pp. 156-160
Author(s):  
Akira KOBAYASHI
Keyword(s):  
Temperature Fluctuation ◽  
Creep Properties ◽  
Viscoelastic Column ◽  
Linear Viscoelastic ◽  
Effects Of Temperature

Effects of temperature and stress on creep properties of ethylene tetrafluoroethylene (ETFE) foils for transparent buildings

2017 ◽  
Vol 59 ◽  
pp. 268-276 ◽  
Author(s):  
Jianhui Hu ◽  
Yipo Li ◽  
Wujun Chen ◽  
Bing Zhao ◽  
Deqing Yang
Keyword(s):  
Creep Properties ◽  
Effects Of Temperature ◽  
Ethylene Tetrafluoroethylene

Transverse Vibration of a Viscoelastic Column With Initial Curvature Under Periodic Axial Load

1969 ◽  
Vol 36 (4) ◽  
pp. 814-818 ◽  
Author(s):  
K. K. Stevens
Keyword(s):  
Polymethyl Methacrylate ◽  
Transverse Vibration ◽  
Axial Load ◽  
Dynamic Instability ◽  
Complex Modulus ◽  
Lateral Vibrations ◽  
Lateral Response ◽  
Viscoelastic Column ◽  
Linear Viscoelastic ◽  
Frequency Curves

The lateral response of a slightly curved viscoelastic column subjected to a periodic axial load P0 + P1 cos ωt is investigated. The analysis makes use of the complex modulus representation for linear viscoelastic materials. It is shown that the lateral vibrations stemming from imperfections can be of significant amplitude. Experimentally determined amplitude-frequency curves for a polymethyl methacrylate (Plexiglas) column are presented, and are found to be in excellent agreement with the theory. It is shown that there is an analogy between the dynamic instability and the static buckling of imperfect columns.

Dynamic stability of viscoelastic columns loaded by a follower force

2004 ◽  
Vol 218 (10) ◽  
pp. 1091-1101 ◽  
Author(s):  
T T Darabseh ◽  
J Genin
Keyword(s):  
Boundary Value Problems ◽  
Dynamic Instability ◽  
Element Model ◽  
Follower Load ◽  
Dynamic Approach ◽  
Stability Analyses ◽  
Damping Coefficients ◽  
Viscoelastic Column ◽  
Linear Viscoelastic ◽  
The Stability

This paper analyses the motion of a linear viscoelastic column using the dynamic approach. The viscoelastic material is mathematically represented by the four-element model. Using this model as a recursion equation, the elastic, one-, two-, three- and four-element models are solved and their results compared. The stability analyses of these systems are investigated by studying the eigenvalues of the characteristic equations for the solution to the boundary value problems. The stability analyses determined the smallest value of the follower load beyond which the system, under a suitable disturbance, will perform oscillations with increasing amplitudes. The dynamic instability is found to occur in the form of flutter. The effect of damping on the critical follower load is also examined. Three damping parameters are considered that affect the results. They are the damping coefficients related to a Maxwell unit, to a Kelvin unit and one appropriate to a combination of the two. The destabilization effects of viscosity are discussed.

Effects of temperature fluctuation on the development of cyanobacterial dominance in spring: implication of future climate change

Hydrobiologia ◽  
2015 ◽  
Vol 763 (1) ◽  
pp. 135-146 ◽  
Author(s):  
Min Zhang ◽  
Baoli Qin ◽  
Yang Yu ◽  
Zhen Yang ◽  
Xiaoli Shi ◽  
...  
Keyword(s):  
Climate Change ◽  
Temperature Fluctuation ◽  
Future Climate ◽  
Future Climate Change ◽  
Effects Of Temperature ◽  
Cyanobacterial Dominance

scholarly journals Impact of Storage Temperature Fluctuation on Modified-atmosphere Packaging of Fresh Produce

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 811D-811
Author(s):  
K. Tano ◽  
L.Z. Lee ◽  
F. Castaigne ◽  
J. Arul
Keyword(s):  
Temperature Fluctuation ◽  
Fruits And Vegetables ◽  
Storage Temperature ◽  
Fresh Produce ◽  
Modified Atmosphere Packaging ◽  
Temperature Fluctuations ◽  
Modified Atmosphere ◽  
Ma Packaging ◽  
Effects Of Temperature

Use of modified atmosphere (MA) as an adjunct to low temperature can be effective method for prolonging the shelflife of fresh fruits and vegetables. However, if storage temperature fluctuates, anoxic conditions can result and, consequently, the fresh produce quality can deteriorate rapidly. The objective of this investigation was to evaluate the effects of temperature fluctuation on the atmosphere inside the package and on the quality of packaged produce. Mushrooms (A. bisporus, U3 Sylvan 381) were packaged in rigid containers (4 liters) fitted with diffusion windows to obtain an atmosphere of 5% O2 and 10% CO2 at 4C. Temperature fluctuation had a major impact to the atmosphere inside package. During the first fluctuation sequence, O2 level depleted to 1.5% and CO2 increased to 18%. When the temperature returned to 4C during the next sequence, CO2 level fell back to 10%, but O2 level remained at 1.5%. The quality of mushrooms stored under temperature-fluctuating conditions was severely affected, as indicted by the extent of browning, loss of texture, and level of ethanol in the tissue compared to mushrooms stored at constant temperature. It was clear from this experiment that under temperature fluctuation, even it occurs once, can seriously compromise the benefits of MA packaging and safety of the packaged product. It is thus necessary that MA packaging compensate for the additional permeability required that is caused by storage temperature fluctuations.

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