A constitutive model for the dynamic and high-pressure behaviour of a propellant-like material: Part I: Experimental background and general structure of the model

2001 ◽  
Vol 25 (6) ◽  
pp. 551-579 ◽  
Author(s):  
Herv� Trumel ◽  
Andr� Dragon ◽  
Alain Fanget ◽  
Philippe Lambert
Keyword(s):  
High Pressure ◽  
Constitutive Model ◽  
General Structure ◽  
Material Part ◽  
Experimental Background

Constitutive model and deformation microstructure of fine-grain Mg-Zn-Y alloy solidified under high pressure

2016 ◽  
Vol 34 (9) ◽  
pp. 945-951 ◽  
Author(s):  
Zhibin FAN ◽  
Xiaoping LIN ◽  
Yun DONG ◽  
Rui XU ◽  
Chan LI ◽  
...  
Keyword(s):  
High Pressure ◽  
Constitutive Model ◽  
Deformation Microstructure ◽  
Fine Grain

scholarly journals Elasto-plastic constitutive model for sand in low and high pressure.

1988 ◽  
pp. 11-20
Author(s):  
Hidekazu MURATA ◽  
Masayuki HYODO ◽  
Noriyuki YASUFUKU
Keyword(s):  
High Pressure ◽  
Constitutive Model

A constitutive model of human dermis skin incorporating different collagen fiber families

2021 ◽  
pp. 1-40
Author(s):  
Zhonghui Yuan ◽  
Qinyi Huang ◽  
Xudong Liang ◽  
Zheng Zhong
Keyword(s):  
Constitutive Model ◽  
Strain Energy ◽  
Collagen Fiber ◽  
General Structure ◽  
Heterogeneous Material ◽  
Inhomogeneous Deformation ◽  
Human Face ◽  
Human Dermis ◽  
Good Agreement

Abstract Skin tissue is a complex heterogeneous material abundant with fibers. Various models capturing its anisotropy, nonlinearity, viscoelasticity have been developed. However, the existence of multiple fiber families and the differences among them have been largely ignored. Furthermore, inhomogeneous deformation over the thickness is observed in the skin under shear deformation, which the traditional skin models do not predict. In this paper, we propose that two fiber families with distinct mechanical and structural properties exist in the skin within the framework of a general structure tensor-based constitutive strain energy model. Our constitutive model considers distinct properties of fiber families and the consequent inhomogeneous deformation in the skin, showing good agreement with in vivo measurements of human face skin.

Study of magnetomechanical non-linear deformation of ferromagnetic materials: Theory and experiment

2004 ◽  
Vol 218 (12) ◽  
pp. 1405-1410 ◽  
Author(s):  
D N Fang ◽  
X Feng ◽  
K C Hwang
Keyword(s):  
Magnetic Field ◽  
Constitutive Model ◽  
Yield Surface ◽  
Remanent Magnetization ◽  
General Structure ◽  
Ferromagnetic Materials ◽  
Internal Variables ◽  
Linear Deformation ◽  
Soft Ferromagnetic ◽  
Non Linear

A robust constitutive model is desirable in order to guide the processing and development of ferromagnetism and for use in the design of ferromagnetic devices. In this paper, a non-linear constitutive model of soft ferromagnets is developed for general magnetomechanical loading histories. The experimental set-up and measured techniques, which were employed to measure the non-linear deformation of both the magnetostrictive materials and the soft ferromagnetic materials subjected to coupled magnetomechanical loading, are introduced. The general structure for the constitutive behaviour of ferromagnets including soft-ferromagnetic and hard-ferromagnetic materials is similar to the classical models of metal plasticity; i.e. a convex yield surface can be identified in a stress-magnetic field space, within which the deformation and magnetization are reversible, and increments of both remanent magnetization and remanent strains are normal to the yield surface. The state of materials is described in terms of the remanent strain and the remanent magnetization that are introduced as internal variables besides stress, strain, magnetic field and magnetization. The one-dimensional model is examined by numerical stimulations and the response of the ferromagnetic materials is discussed in comparison with the measured results. The macroscopic features of ferromagnets, such as hysteresis loop and magnetostrictive hysteresis, are predicted.

A multi-level damage and creep behaviour of material subjected to high pressure: metal versus composite – A micromechanics approach

2017 ◽  
Vol 233 (3) ◽  
pp. 772-786 ◽  
Author(s):  
VS Kathavate ◽  
DN Pawar ◽  
AS Adkine
Keyword(s):  
High Pressure ◽  
Composite Material ◽  
Constitutive Model ◽  
Creep Behaviour ◽  
Damage Model ◽  
The Past ◽  
Nonlinear Constitutive Model ◽  
Micromechanical Damage ◽  
Multi Level ◽  
Dependent Behaviour

This current study reports on multi-level damage and creep behaviour of metal and composite material under external high pressure using finite element concept. A fatigue damage model with microcracks with improper interface has been portrayed in the present investigation. In addition, the overall elastic properties and damage evaluation are also studied and comparative study of mechanical properties has been outlined. Further thermo-elastic creep response of materials based on Norton’s law is also presented. The results showed that the proposed nonlinear constitutive model and overall elastic damage behaviour of composite material are in agreement. Implemented nonlinear constitutive model is secured by comparing predicted stress–strain curves with experimental data available in the past literature under uniaxial tension. The time-dependent behaviour creep stresses and displacements are studied and plotted. The analysis provides significant new insights of micromechanical damage, creep and collapse behaviour of composite material. For the structural composites, some notable techniques have been developed over the past three decades; review of these techniques is also outlined here in this paper and state of art is established together with insights for upcoming development.

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