Stress compensation-displacement

Abstract The Ratio of Crack Opening Dependency (RCOD) was proposed as a new index to simultaneously evaluate the mechanical and hydraulic properties of cracked structure which contains many open cracks within. The RCOD is an index which is defined as the ratio of total amount of crack opening and the total deformation of cracked structure. The efficiency of RCOD as an index to evaluate the coupled problem was numerically analyzed by applying SCDDM (stress compensation-displacement discontinuity method) to the two dimensional multi crack model. It was shown that RCOD is an useful index which can directly evaluate the deformability and the permeability of the cracked structure without any parameters such as stresses or crack size. The possibility of application of RCOD to the field measurements was also discussed. 

Homogenization analysis of multi joint set problem by the Stress Compensation-Displacement Discontinuity Method (SC-DDM) (1st Report)-, Shigen-to-sozai, 117(11), pp.251-257. 

Therefore the pyroelectric coefficient at constant mechanical stress (J) is equal to the sum of two terms. First term in Eq. (5.22) represents the pyroelectric coefficient at constant strain - so called primary pyroelectric effect. Pyroelectric coefficient pf describes the electric displacement as a function of the temperature change for the sample with compensated thermal expansion. Corresponding pyroelectric coefficient... 

The analysis of possible crack dimensions in the pressure pipes was performed with the help of failure mechanics methods. In accordance with the calculations, the maximum stress in the pressure pipe at 100% power reactor operation is 459 MPa, taking into account residual welding stresses, thermal stresses, and self-compensation stresses from the displacement of supports and attachments. 

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