Time-Dependent Mechanical Response of Ice Adhesion on Aluminum Substrates

2021 ◽  
Author(s):  
Marina Machado ◽  
Teresa Reilly ◽  
Vladimir Alvarado ◽  
John Ackerman ◽  
Joseph Murphy ◽  
...  
Keyword(s):  
Mechanical Response ◽  
Time Dependent ◽  
Aluminum Substrates ◽  
Ice Adhesion

Time-dependent mechanical response of paper during web-fed high-speed inkjet printing

2019 ◽  
Vol 34 (1) ◽  
pp. 107-116
Author(s):  
Jussi Lahti ◽  
Jarmo Kouko ◽  
Ulrich Hirn
Keyword(s):  
Inkjet Printing ◽  
High Speed ◽  
Mechanical Response ◽  
Creep Compliance ◽  
Time Dependent ◽  
Print Quality ◽  
Wetting And Drying ◽  
Process Step ◽  
Tensile Tester ◽  
The Web

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.

The Time Dependent Behavior of Linear Viscoelastic Polymers

2011 ◽  
Vol 675-677 ◽  
pp. 435-438
Author(s):  
Wei Xiang Zhang ◽  
Xing Shao ◽  
Zhao Ran Xiao
Keyword(s):  
Mechanical Behavior ◽  
Mechanical Characteristics ◽  
Mechanical Response ◽  
Constitutive Relations ◽  
Time Dependent ◽  
Numerical Examples ◽  
General Methodology ◽  
Inverse Transform ◽  
Dependent Behavior ◽  
Linear Viscoelastic

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.

scholarly journals Eshelby-Kröner Viscoelastic Self-Consistent Model Multi-Scale Behavior of Polymer Composites under Creep Loading

2013 ◽  
Vol 682 ◽  
pp. 105-112 ◽  
Author(s):  
A. Yousfi ◽  
Sylvain Fréour ◽  
Frédéric Jacquemin
Keyword(s):  
Mechanical Properties ◽  
Mechanical Response ◽  
Effective Properties ◽  
Time Dependent ◽  
Creep Process ◽  
Internal Stresses ◽  
Temperature Range ◽  
Consistent Model ◽  
Self Consistent ◽  
Different Temperatures

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.

Mathematical Modeling of Ligaments and Tendons

1993 ◽  
Vol 115 (4B) ◽  
pp. 468-473 ◽  
Author(s):  
S. L.-Y. Woo ◽  
G. A. Johnson ◽  
B. A. Smith
Keyword(s):  
Mathematical Modeling ◽  
Finite Strain ◽  
Mechanical Response ◽  
Time Dependent ◽  
Experimental Investigations ◽  
Display Time ◽  
Viscoelastic Models ◽  
The Past ◽  
Dependent Behavior ◽  
Single Integral

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.

scholarly journals Time-dependent and energy dissipation effects on the electro-mechanical response of PZTs

2016 ◽  
Vol 102 ◽  
pp. 74-89 ◽  
Author(s):  
Kamran A. Khan ◽  
Anastasia H. Muliana ◽  
Hassene Ben Atitallah ◽  
Zoubeida Ounaies
Keyword(s):  
Energy Dissipation ◽  
Mechanical Response ◽  
Time Dependent

Time-dependent Mechanical Response at the Nanoscale

2020 ◽  
Vol 148 ◽  
pp. 103443
Author(s):  
Juan Camilo Múnera ◽  
Debkalpa Goswami ◽  
Ramses V. Martinez ◽  
E. Alex Ossa
Keyword(s):  
Mechanical Response ◽  
Time Dependent

scholarly journals Micromechanics of creep and relaxation of wood. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture

Holzforschung ◽  
2009 ◽  
Vol 63 (2) ◽  
Author(s):  
Parviz Navi ◽  
Stefanie Stanzl-Tschegg
Keyword(s):  
Mechanical Response ◽  
Molecular Level ◽  
Polymeric Materials ◽  
Climatic Conditions ◽  
Time Dependent ◽  
Viscoelastic Behaviour ◽  
Single Fibres ◽  
Time Dependent Behaviour ◽  
Wood Machining ◽  
Dependent Behaviour

Abstract Wood, like all polymeric materials, shows viscoelastic behaviour. The time dependent behaviour of wood depends on material anisotropy, temperature, moisture and stresses. To predict the behaviour of wood, numerous mathematical models have been developed largely relying on experimental results. In this paper, time dependent viscoelastic behaviour of wood is reviewed under constant and cyclic climatic conditions, separately. More emphasis is given on results obtained in recent years on the behaviour of thin wood tissues, single fibres, thermo-viscoelasticity of wood, influence of hemicelluloses and the modelling of the effect of transient moisture at the molecular level on the mechanical response.

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 ◽  
...  
Keyword(s):  
Single Crystals ◽  
Mechanical Response ◽  
Time Dependent

Time-dependent behaviour and water influence on the mechanical response of gypsum rock in underground quarry frameworks

2020 ◽  
Author(s):  
Chiara Caselle ◽  
Sabrina Bonetto ◽  
Patrick Baud
Keyword(s):  
Oil And Gas ◽  
Mechanical Response ◽  
Water Saturation ◽  
Triaxial Compression ◽  
Critical Time ◽  
Time Dependent ◽  
Wide Range ◽  
Influence Of Water ◽  
Gypsum Rock ◽  
Underground Quarry

<p>The mechanical response of natural gypsum rock is relevant in a wide range of engineering applications (e.g. tunnel excavation, stability assessment of underground quarries, oil and gas accumulation). In particular, in underground quarry environments, static loading conditions insisting on the gypsum pillars during and after the exploitation activities (i.e. several decades) require a specific attention to the sub-critical time-dependent deformation of the rock. The short-term stability (referred to the possibility of a failure in consequence to the sudden application of the axial load) does not preclude the possibility of deformation or even failure in the long-term.</p><p>In addition, the underground drifts of gypsum quarries are often located below the static level of the groundwater table, requiring a continuous water pumping to allow for the accessibility of the drifts themselves. The end of the quarry activity, coinciding with the interruption of the de-watering operations and the re-assessment of the original level of water table, brings to the new water saturation of the gypsum body. The water fills the connected porosity of the rock, influencing the general stability of the underground voids.</p><p>For these reasons, the present work aims to investigate the mechanical response of gypsum rock in time-dependent regime, also considering the influence of water saturation. The study proposes an experimental investigation of the influence of water on the rheology of a natural gypsum facies (i.e. branching selenite gypsum), distinguishing between the mechanical effects of a saturating fluid (in relation to the internal pore pressure), that should also be observed with a non-reactive fluid such as oil, and the water-gypsum chemical interactions. This influence of water is investigated in uniaxial compression, under uniaxial creep conditions and conventional triaxial compression. The new mechanical data are accompanied by microstructural observations of the effects induced in the rock by the mechanical compression, aiming to propose a description of the mechanisms involved in the gypsum deformation process.</p>

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