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Compared with plane fracture problem, elastic-plastic fracture problem of stiffened plate under bending has its particularity and inevitability for research, and its essence is a three-dimensional fracture mechanics problem. The aim of this paper is to develop a method to analyze bending elastic-plastic fracture of stiffened plates with crack in plate based on Dugdale model, combined with the Paris...
Force regulation is a challenging issue of robot end-effectors when interacting with unknown environments. It often requires sophisticated sensors with computerized control. This paper presents a constant-force mechanism (CFM) to regulate the contact force of a robot end-effector. The proposed CFM is a monolithic compliant mechanism that has no frictional wear and is capable of miniaturization. Due...
Based on the idea of the extended finite element method (XFEM), a new enriched displacement function, the exponent discontinuous function is presented to simulate the discontinuous character resulted from discontinuity such as crack, interface or joint. Simultaneously, for element containing the crack tip, the triangular basis function is introduced to embody singularity of the discontinuity tip....
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