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Residual stress of thin-walled blanks with complex cavity structure is an important influence factor on the stability of machining. The most residual stress testing technologies is only suitable to measure residual stress of surface or shallow surface. It is difficult to ensure the accuracy to measure residual stress inside workpiece. In order to study the reliability and accuracy of incremental hole...
Grab structure performance will directly affect the reliability of the crane work. In this paper, we completed the structural design of the tower crane grab components, and analyzed the grab by finite element method in the most dangerous conditions. So The stress, strain and deformation value of the condition are obtained. Finding out the position of the grab most prone to damage and the defects of...
Materials that possess a negative Poisson's ratio are called Auxetics. They are characterized by the counterintuitive behavior of expanding in tension and contracting in compression. To justify this deformation behavior, there have been developed theoretical modelations like the reentrant and bowtie models. However, the most generalized models are based on geometries that possess rigid trusses and...
A previously published analytical model for thermal stress and strain in idealized plated-through-vias (PTVs) has been adapted to conduct elastic-plastic analyses of vias with geometric defects using elastic stress concentration factors calculated earlier. The von Mises stress amplitude, at the mid-plane of the perfect via and at the defect (Δσ0 and Δσ, respectively), and the cumulative plastic von...
Nuss Orthopedic of Pectus Excavatum(PE) is a novel minimal invasive surgical technique for the treatment of PE, however, the surgery will fail as the Nuss bar is slipped or rotated. In this paper, the preoperative and postoperative helical CT scans were carried out for one child patient of PE, and the preoperative and postoperative 3D model for thorax is built according to the CT. To preoperative...
The tests date to characterize the rubber material constants as well as the hyperelastic material stability is discussed. The rubber material of engine mount is analyzed based on different forms of strain energy potentials using finite element analysis software ABAQUS. The method of using test data to calibrate material coefficients is obtained. Both of the hyperelastic constitutive law and the viscoelasticity...
the text analyses the rule of load transmission of squeezed branch plate pile group foundation under horizon load by using the 3D elastic-plasticity finite element model. The results obtain relative displacement between pile and soil, bending moment of piles, and curves of soil resistance in different position, different step load and different deepness. The results show that: relative displacement...
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