scholarly journals Reducing Uncertainties in Hydrocarbon Prediction through Application of Elastic Domain

Author(s):  
S Z Shamsuddin ◽  
M Hermana ◽  
D P Ghosh ◽  
A M A Salim
1970 ◽  
Vol 5 (1) ◽  
pp. 67-80
Author(s):  
Abdul Mustaqim

One fresh contribution to the contemporary study of fiqh (Islamic jurisprudence) is the theory of limits (nazariyyah al-hudud) promoted by a Syirian liberal Islamic figure, Muhammad Syahrur. Syahrur’s theory of limits solves the epistemological deadlock of previous works. Syahrur asserts that the theory of limits is an approach within ijtihad (individual interpretation) to study the muhkamat verses (clear and direct verses of law) of the Qur’an. The term “limit” (hudud) used by Syahrur refers to the meaning of “the bounds or restrictions of God which should not be violated, contained in the dynamic, flexible, and elastic domain of ijtihad. By using the theory of limit, Syahrur tries to re-constructs both concept poligamy and jilbab as contribution to the contemporary study of Islamic jurisprudence.


2021 ◽  
Author(s):  
Koichi Hashiguchi ◽  
Tatsuya Mase ◽  
Yuki Yamakawa

AbstractThe description of the cyclic mobility observed prior to the liquefaction in geomaterials requires the sophisticated constitutive formulation to describe the plastic deformation induced during the cyclic loading with the small stress amplitude inside the yield surface. This requirement is realized in the subloading surface model, in which the surface enclosing a purely elastic domain is not assumed, while a purely elastic domain is assumed in other elastoplasticity models. The subloading surface model has been applied widely to the monotonic/cyclic loading behaviors of metals, soils, rocks, concrete, etc., and the sufficient predictions have been attained to some extent. The subloading surface model will be elaborated so as to predict also the cyclic mobility accurately in this article. First, the rigorous translation rule of the similarity center of the normal yield and the subloading surfaces, i.e., elastic core, is formulated. Further, the mixed hardening rule in terms of volumetric and deviatoric plastic strain rates and the rotational hardening rule are formulated to describe the induced anisotropy of granular materials. In addition, the material functions for the elastic modulus, the yield function and the isotropic hardening/softening will be modified for the accurate description of the cyclic mobility. Then, the validity of the present formulation will be verified through comparisons with various test data of cyclic mobility.


2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Gongfeng Jiang ◽  
Gang Chen ◽  
Liang Sun ◽  
Yiliang Zhang ◽  
Xiaoliang Jia ◽  
...  

Experimental results of uniaxial ratcheting tests for stainless steel 304 (SS304) under stress-controlled condition at room temperature showed that the elastic domain defined in this paper expands with accumulation of plastic strain. Both ratcheting strain and viscoplastic strain rates reduce with the increase of elastic domain, and the total strain will be saturated finally. If the saturated strain and corresponded peak stress of different experimental results under the stress ratio R ≥ 0 are plotted, a curve demonstrating the material shakedown states of SS304 can be constituted. Using this curve, the accumulated strain in a pressure vessel subjected to cyclic internal pressure can be determined by only an elastic-plastic analysis, and without the cycle-by-cycle analysis. Meanwhile, a physical experiment of a thin-walled pressure vessel subjected to cyclic internal pressure has been carried out to verify the feasibility and effectiveness of this noncyclic method. By comparison, the accumulated strains evaluated by the noncyclic method agreed well with those obtained from the experiments. The noncyclic method is simpler and more practical than the cycle-by-cycle method for engineering design.


2012 ◽  
Vol 472-475 ◽  
pp. 178-182
Author(s):  
Zhi Ming Li ◽  
Xue Yan Hu ◽  
Ling Xia Zhen

Based on the Biot theory and laboratory data, engineers of LandOcean recently develop a certain technology for hydrocarbon detection in multi-phase medium in order to reduce ambiguity and uncertainty. The sensitivity of the technology is superior to others especially in carbonate pores and cave detection, igneous hydrocarbon prediction and fluid detection of non-well areas. A number of projects and wells drilling proved that this technology is effective and reliable.


2019 ◽  
Vol 30 (7) ◽  
pp. 075104 ◽  
Author(s):  
Songtao Guo ◽  
Tao Cai ◽  
Xiaofeng Zhao ◽  
Di Peng ◽  
Ping Xiao ◽  
...  

Author(s):  
Uri Kushnir ◽  
Oded Rabinovitch

Macro Fiber Composite (MFC) actuators, which are commonly integrated in modern smart structures, may be subjected to high levels of mechanical loads. Opposed to the electrical actuation, these loads are not always controlled or anticipated by the user. Thus, they may yield a response that is beyond the linear range due to a stress induced ferro-elastic domain switching. In this paper, the phenomenon of domain switching and mechanical depolarization in the MFC actuator and the resulting degradation of the actuation capabilities are investigated. As an illustrative numerical example, the response of MFC layers in an active beam element is analyzed. Emphasis is placed on the location of the fiber segment along the active beam with a distinction between the compressed and the tensed layers. The results highlight the range of effects associated with the potential nonlinear response of the active structure under high levels of mechanical load.


2003 ◽  
Vol 2003.1 (0) ◽  
pp. 17-18
Author(s):  
Shoichi FURUYAMA ◽  
Teruo MATSUZAWA

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