For a long time, the traditional pattern of urban-rural human settlements has been shaped in reference to the existence of the urban-rural dual structure. In this paper, we put forward the notion of triaxiality of human settlements, and used the standards conversion entropy weight method to measure and calculate degrees of livability of human settlements, so as to prove the existence of triaxia...

Under warm forming, the damage parameters of extended GTN model are easily affected by temperature, and failure materials under forming is less studied using this model. In paper, based on model, DP590 at different temperatures determined experiment numerical simulation, studying trend changing with temperature. Through analysis shear specimens angles temperatures, we changes in void conditions...

Large deformation finite element analysis has been carried out to investigate the stress-strain fields ahead of a growing crack for compact tension (a/W=0.5) and three-point bend (a/W=0.1 and 0.5) specimens under plane stress condition. The crack growth is controlled by the experimental J-integral resistance curves measured by Sun et al. The results indicate that the distributions of opening st...

To study the deformation and fracture mechanism of 6061 aluminum alloy extruded pipe after secondary heat treatment under different stress triaxiality, a Johnson–Cook failure model was developed. Through FEM method SEM, types tensile specimens analyzed. The research results show that could better simulate types, parameters were finally obtained D1 = 0.29, D2 1.356, D3 ?2.567. With increase stra...

Engineers can learn from nature for inspirations to create new designs. The internal structure of lotus roots with several oval holes was studied in this paper for engineering inspirations. The structural performance of lotus roots under outside water pressure was simulated and compared with various cross-sectional areas. The distribution of stresses in the cross-sectional area of lotus roots w...

Stress state is a primary factor controlling the ductile fracture behavior of steels, which typically represented as combination stress triaxiality and Lode angle parameter. The cleavage properties pipeline steels at low temperatures are usually assessed under plane strain conditions, such using mechanics experiments. In this study, X70 steel liquid nitrogen temperature (?196 °C) characterized ...