scholarly journals Time-Dependent Mechanical Response of APbX3 (A = Cs, CH3 NH3 ; X = I, Br) Single Crystals

2017 ◽  
Vol 29 (24) ◽  
pp. 1606556 ◽  
Author(s):  
Marcos A. Reyes-Martinez ◽  
Ahmed L. Abdelhady ◽  
Makhsud I. Saidaminov ◽  
Duck Young Chung ◽  
Osman M. Bakr ◽  
...  
2019 ◽  
Vol 34 (1) ◽  
pp. 107-116
Author(s):  
Jussi Lahti ◽  
Jarmo Kouko ◽  
Ulrich Hirn

Abstract The influence of wetting and drying during high-speed inkjet (HSI) printing on the time-dependent mechanical behavior of commercial HSI papers was investigated using a custom-built C-Impact tensile tester. In HSI printing the water based ink solvent penetrates into the paper while the colorants adhere onto the surface. We found that water strongly affected paper stiffness and strength already 0.1 s after wetting. Creep compliance and paper strain at a typical HSI printing input tension of 180 N/m are varying strongly during the different process steps of HSI printing. In order to achieve a good color registration and print quality, we thus recommend that the web tension should be dynamically controlled in each process step to prevent straining after wetting or shrinkage during drying.


2011 ◽  
Vol 675-677 ◽  
pp. 435-438
Author(s):  
Wei Xiang Zhang ◽  
Xing Shao ◽  
Zhao Ran Xiao

Polymers have been proved to have attractive mechanical characteristics, which made it desirable to choose these materials over traditional materials for numerous types of applications. As the uses of polymers increase, a thorough understanding of the mechanical behavior of these materials becomes vital in order to perform innovative and economical designs of various components. The main objective of this paper is to develop an effective method with the use of the Laplace inverse transform to describe the time dependent mechanical response of viscoelastic polymers. This general methodology is based on differential constitutive relations for viscoelastic polymers, avoiding the use of relaxation integral functions. As its application, the creep and relaxation properties of the materials are exhibited in the numerical examples.


1972 ◽  
Vol 57 (6) ◽  
pp. 2560-2571 ◽  
Author(s):  
A. von Hippel ◽  
R. Mykolajewycz ◽  
A. H. Runck ◽  
W. B. Westphal

1982 ◽  
Vol 41 (5) ◽  
pp. iii ◽  
Author(s):  
H. Wengeler ◽  
R. Knobel ◽  
H. Kathrein ◽  
G. Demortier ◽  
G. Wolff ◽  
...  

2013 ◽  
Vol 682 ◽  
pp. 105-112 ◽  
Author(s):  
A. Yousfi ◽  
Sylvain Fréour ◽  
Frédéric Jacquemin

The mechanical response of the composite structure in T650-35/PMR-15 aged at different temperatures was studied numerically. The time-dependent internal stresses in the composite ply and its constituents were computed during the creep process. In order to predict the effective properties of PMR-15/T650-35 composite ply in the temperature range [250-350°, the time-dependent mechanical properties of PMR-15 matrix determined experimentally [, were considered. The mechanical properties of the fibers do not experience any change due to the aging process in such a temperature range [2, . In order to achieve the computations, the visco-elastic Eshelby Kröner self-consistent model was used.


1993 ◽  
Vol 115 (4B) ◽  
pp. 468-473 ◽  
Author(s):  
S. L.-Y. Woo ◽  
G. A. Johnson ◽  
B. A. Smith

Ligaments and tendons serve a variety of important functions in maintaining the structure of the human body. Although abundant literature exists describing experimental investigations of these tissues, mathematical modeling of ligaments and tendons also contributes significantly to understanding their behavior. This paper presents a survey of developments in mathematical modeling of ligaments and tendons over the past 20 years. Mathematical descriptions of ligaments and tendons are identified as either elastic or viscoelastic, and are discussed in chronological order. Elastic models assume that ligaments and tendons do not display time dependent behavior and thus, they focus on describing the nonlinear aspects of their mechanical response. On the other hand, viscoelastic models incorporate time dependent effects into their mathematical description. In particular, two viscoelastic models are discussed in detail; quasi-linear viscoelasticity (QLV), which has been widely used in the past 20 years, and the recently proposed single integral finite strain (SIFS) model.


2016 ◽  
Vol 102 ◽  
pp. 74-89 ◽  
Author(s):  
Kamran A. Khan ◽  
Anastasia H. Muliana ◽  
Hassene Ben Atitallah ◽  
Zoubeida Ounaies

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