PIEZOELECTRIC POLARIZATION OF THE FERROELECTRIC POLYMER PVDF FROM 10 MPa TO 10 GPa: STUDIES OF LOADING-PATH DEPENDENCE

Author(s):  
R.A. GRAHAM ◽  
M.U. ANDERSON ◽  
F. BAUER ◽  
R.E. SETCHELL
2011 ◽  
Vol 4 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Kyoo Sil Choi ◽  
Ayoub Soulami ◽  
Wenning Liu ◽  
Xin Sun ◽  
Moe Khaleel

2012 ◽  
Vol 730-732 ◽  
pp. 727-732 ◽  
Author(s):  
Luís G. Reis ◽  
Vitor Anes ◽  
Bin Li ◽  
Manuel de Freitas

In this paper, the mechanical behaviour of extruded AZ31 magnesium alloys under multiaxial fatigue loading conditions is studied. The monotonic properties of the AZ31 magnesium alloy were determined by tests on the specimens which were machined from extruded rods. Then, the cyclic deformation under multiaxial loading conditions was simulated by ANSYS and a plasticity program with the Jiang & Sehitoglu plasticity model. The fatigue lives were estimated by the critical plane models coupled with Coffin-Manson rule, such as Findley, Fatemi-Socie, Brown-Miller, SWT and Liu models. Four loading paths were considered with different levels of non-proportionality, the results show significant loading path dependence.


2009 ◽  
Author(s):  
Seth Root ◽  
James R. Asay ◽  
Mark Elert ◽  
Michael D. Furnish ◽  
William W. Anderson ◽  
...  

2008 ◽  
Vol 47-50 ◽  
pp. 964-967
Author(s):  
Yong Jun He ◽  
Qing Ping Sun

Recent experiment [1] revealed many new characteristics of the domain patterns in a superelastic polycrystalline NiTi tube during tensile loading, such as domain wall instability and branching, dynamic topology transition of domain patterns. In this paper, we use the continuum mechanics approach and model the polycrystal as a phase-transformable continuum described by non-local nonlinear elasticity [2]. We simulate the equilibrium macroscopic domain patterns and their evolution in the tubes under tensile loading by the nonlocal Finite Element Method (FEM). It is revealed that the loading path dependence and dynamic topology transition of domain patterns are mainly due to thermodynamic metastability of the tube system. Our simulations capture all the key features of the domain patterns observed in the NiTi polycrystalline tubes.


2020 ◽  
pp. 51-81
Author(s):  
D. P. Frolov

The transaction cost economics has accumulated a mass of dogmatic concepts and assertions that have acquired high stability under the influence of path dependence. These include the dogma about transaction costs as frictions, the dogma about the unproductiveness of transactions as a generator of losses, “Stigler—Coase” theorem and the logic of transaction cost minimization, and also the dogma about the priority of institutions providing low-cost transactions. The listed dogmas underlie the prevailing tradition of transactional analysis the frictional paradigm — which, in turn, is the foundation of neo-institutional theory. Therefore, the community of new institutionalists implicitly blocks attempts of a serious revision of this dogmatics. The purpose of the article is to substantiate a post-institutional (alternative to the dominant neo-institutional discourse) value-oriented perspective for the development of transactional studies based on rethinking and combining forgotten theoretical alternatives. Those are Commons’s theory of transactions, Wallis—North’s theory of transaction sector, theory of transaction benefits (T. Sandler, N. Komesar, T. Eggertsson) and Zajac—Olsen’s theory of transaction value. The article provides arguments and examples in favor of broader explanatory possibilities of value-oriented transactional analysis.


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