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Both methods assume a perfectly plastic soil model with a Tresca yield criterion and generate large linear programming problems. The solution to the lower bound linear programming problem is obtained by modelling a statically admissible stress field, whereas the upper bou...
“Although this was a specific situation, I have a lot of cases like this,” Ulherr says. “We are often facing problems with insert bearings because the customers are just not aware that they cannot accommodate a heavy load or that they are only locating bearings.” Ulherr’s message to...
Alternative solutions used fixed-bearing designs, which increase stability and reduce the risk of bearing dislocation, but with a theoretical increase of contact stresses leading to a higher polyethylene wear. The purpose of this study was to investigate the contact stresses, pressure and area in ...
The paper systematically reviews the theories and methods of hydrostatic bearing spindle systems and points out the existing problems and potential solutions to reduce thermal errors. The research results can provide predictive guidance and references for the design of hydrostatic bearing spindle systems. ...
Due to the obvious difficulties in constructing a good statically admissible stress field for a strip footing on ponderable cohesionless soil, the writers are unaware of any rigorous lower bound solution for the bearing capacity factor Nγ. Reasonable upper bound solutions, however, have been ...
The existing mechanical and grouting anchors mostly use the expansion shell method to form a cavity on the borehole wall, and the cement slurry is poured to form multiple enlarged head plates, but the operation is more difficult and the diameter of the f
aThe stress corrosion cracking of type 316 stainless steel has been examined using both circumferentially notched 316 specimens and unnotched 9Cr-1Mo to 316 transition joint samples, both tested in sodium hydroxide solutions at 300 or 350°C. 晶粒间应力腐蚀崩裂 (IGSCC) 使敏感的AISI 304不锈钢的 ...
The solutions to the stressed ballast problems are summarized into three aspects, i.e., ballast degradation mitigation, ballast inspection improvement and better ballast condition assessment. 14.1.4.1 Ballast degradation Ballast degradation usually describes the deterioration of ballast bed. Also, it has ...
18.3.4 Technical Solutions 1. Weak basement elimination improves basement bearing capacity by eliminating weak soil layer in important sections of the dump. 2. Basement gully filling fills gullies on the basement with dysgeogenous rocks by the composition of high calcium and low sodium to build a...