Undrained response of reconstituted clay to cyclic pure principal stress rotation

A series of monotonic and rotational shearing tests are carried out on reconstituted clay using a hollow cylinder apparatus under undrained condition. In the rotational shearing tests, the principal stress axes rotate cyclically with the magnitudes of the principal stresses keeping constant. The anisotropy of the reconstituted clay is analyzed from the monotonic shearing tests. Obvious pore pressure is induced by the principal stress rotation alone even with shear stress q0=5 k Pa. Strain components also accumulate with increasing the number of cycles and increases suddenly at the onset of failure. The deviatoric shear strain of 7.5% can be taken as the failure criterion for clay subjected to the pure cyclic principal stress rotation. The intermediate principal stress parameter b plays a significant role in the development of pore pressure and strain. Specimens are weakened by cyclic rotational shearing as the shear modulus decreases with increasing the number of cycles, and the shear modulus reduces more quickly with larger b. Clear deviation between the directions of the principal plastic strain increment and the principal stress is observed during pure principal stress rotation. Both the coaxial and non-coaxial plastic mechanisms should be taken into consideration to simulate the deformation behavior of clay under pure principal stress rotation. The mechanism of the soil response to the pure principal stress rotation is discussed based on the experimental observations.

Legislation on the New Types of Cybercrime and Its Application

The new types of cybercrime have different features from traditional“cumulative crimes.”The application of the relevant provisions of the Criminal Law has run into difficulties,and the relevant theoretical explanations of substantive preparatory crime and being an accomplice in crime find it hard to achieve self-consistency.Legislation on the new types of cybercrime is a legitimate response to recent changes in this area.Utilizing the particular techniques of cybercrime and the circumstantial requirement of limiting the amount of criminal harm is the key to satisfying the conditions for offences warranting criminal punishment.The harmfulness of the new types of cybercrime is not great;the law’s circumstantial requirements are flexible,and the criteria for judicial application are unclear,so the law’s provisions are seldom invoked and the sphere of criminal activity is unduly expanded.In order to give full play to the effectiveness of this legislation,we should formulate reasonable judicial rules that accord with the constitution of cybercrimes,narrow down the constituent elements of such crimes in a reasonable way,and categorize and limit the interpretation of circumstantial requirements.