On the explicit dynamics implementation and validation of partitioned rate-type constitutive relation for dampers

2021 ◽  
pp. 1-19
Author(s):  
K. Srikanth ◽  
M. Pandey ◽  
K. Kannan
Keyword(s):  
Constitutive Relation ◽  
Explicit Dynamics ◽  
Rate Type

scholarly journals A thermodynamic basis for implicit rate-type constitutive relations describing the inelastic response of solids undergoing finite deformation

2020 ◽  
Vol 25 (12) ◽  
pp. 2222-2230
Author(s):  
David Cichra ◽  
Vít Průša
Keyword(s):  
Constitutive Relation ◽  
Finite Deformation ◽  
Constitutive Relations ◽  
Plastic Response ◽  
Inelastic Response ◽  
Perfectly Plastic ◽  
Novel Approach ◽  
Elastic Perfectly Plastic ◽  
Rate Type ◽  
Thermodynamic Basis

Implicit rate-type constitutive relations utilising discontinuous functions provide a novel approach to the purely phenomenological description of the inelastic response of solids undergoing finite deformation. However, this type of constitutive relation has so far been considered only in the purely mechanical setting, and the complete thermodynamic basis is largely missing. We address this issue, and we develop a thermodynamic basis for such constitutive relations. In particular, we focus on the thermodynamic basis for the classical elastic–perfectly plastic response, but the framework is flexible enough to describe other types of inelastic response as well.

Eternal Today

2018 ◽  
Author(s):  
Jenni Myllykoski ◽  
Anniina Rantakari
Keyword(s):  
Real Time ◽  
Constitutive Relation ◽  
Human Agency ◽  
Fundamental Characteristic ◽  
Time Study ◽  
Software Company ◽  
Present Experience ◽  
Managerial Strategy ◽  
Over Time ◽  
Strategy Making

This chapter focuses on temporality in managerial strategy making. It adopts an ‘in-time’ view to examine strategy making as the fluidity of the present experience and draws on a longitudinal, real-time study in a small Finnish software company. It shows five manifestations of ‘in-time’ processuality in strategy making, and identifies a temporality paradox that arises from the engagement of managers with two contradictory times: constructed linear ‘over time’ and experienced, becoming ‘in time’. These findings lead to the re-evaluation of the nature of intention in strategy making, and the authors elaborate the constitutive relation between time as ‘the passage of nature’ and human agency. Consequently, they argue that temporality should not be treated merely as an objective background or a subjective managerial orientation, but as a fundamental characteristic of processuality that defines the dynamics of strategy making.

scholarly journals A thermodynamic approach to rate-type models in deformable ferroelectrics

2020 ◽  
Author(s):  
Claudio Giorgi ◽  
Angelo Morro
Keyword(s):  
Free Energy ◽  
Electric Field ◽  
Second Law Of Thermodynamics ◽  
Second Law ◽  
Energy Models ◽  
Polarization Electric Field ◽  
Field Plane ◽  
Vector Valued ◽  
Rate Type ◽  
Hysteretic Properties

AbstractThe purpose of the paper is to establish vector-valued rate-type models for the hysteretic properties in deformable ferroelectrics within the framework of continuum thermodynamics. Unlike electroelasticity and piezoelectricity, in ferroelectricity both the polarization and the electric field are simultaneously independent variables so that the constitutive functions depend on both. This viewpoint is naturally related to the fact that an hysteresis loop is a closed curve in the polarization–electric field plane. For the sake of generality, the deformation of the material and the dependence on the temperature are allowed to occur. The constitutive functions are required to be consistent with the principle of objectivity and the second law of thermodynamics. Objectivity implies that the constitutive equations are form invariant within the set of Euclidean frames. Among other results, the second law requires a general property on the relation between the polarization and the electric field via a differential equation. This equation shows a dependence fully characterized by two quantities: the free energy and a function which is related to the dissipative character of the hysteresis. As a consequence, different hysteresis models may have the same free energy. Models compatible with thermodynamics are then determined by appropriate selections of the free energy and of the dissipative part. Correspondingly, major and minor hysteretic loops are plotted.

Bimodulus constitutive relation and mesoscopic model of braided composites

2021 ◽  
pp. 114115
Author(s):  
Lanxin Jiang ◽  
Shoune Xiao ◽  
Bing Yang ◽  
Guangwu Yang ◽  
Tao Zhu ◽  
...  
Keyword(s):  
Constitutive Relation ◽  
Braided Composites ◽  
Mesoscopic Model

Constitutive Relation of Yunjialing Anthracite Under Medium Strain Rate

2007 ◽  
Vol 17 (1) ◽  
pp. 126-132 ◽  
Author(s):  
Wen-jiao GAO ◽  
Ren-liang SHAN ◽  
Gong-cheng WANG ◽  
Rui-qiang CHENG
Keyword(s):  
Strain Rate ◽  
Constitutive Relation ◽  
Medium Strain Rate

Experimental Study on Bond-Slip Constitutive Relation between CFL and Concrete

2013 ◽  
Vol 302 ◽  
pp. 359-364
Author(s):  
X.H. Zheng ◽  
P.Y. Huang ◽  
X.Y. Guo ◽  
Q. Han
Keyword(s):  
Constitutive Relation ◽  
Displacement Sensor ◽  
Key Factors ◽  
Bond Slip ◽  
Factors Affecting ◽  
Slip Mechanism ◽  
Double Shear ◽  
Carbon Fiber Laminate ◽  
Externally Bonded ◽  
Longitudinal Strains

Externally bonded reinforcing technique with fiber reinforced polymer (FRP) has been widely used in civil engineering. The performance of the interface between FRP and concrete is one of the key factors affecting the behavior of the strengthened structures. This paper presents a detailed study on the bond-slip mechanism between carbon fiber laminate (CFL) and concrete based on double-shear tests. 8 specimens with different bonded length and width of CFL were tested under static loading. Strain gauges along the CFL face and displacement sensor were used to measure longitudinal strains and slip of the interface. The bond-slip constitutive relation of the interface between CFL and concrete was analyzed with the testing results. Compared with four different bond-slip models, a shear stress-slip model was proposed based on the experimental data.

Sign in / Sign up

Export Citation Format

Share Document