Upper bound solution to seismic active earth pressure of submerged backfill subjected to partial drainage

2021 ◽  
Author(s):  
Zhengqiang Zeng ◽  
Shengzhi Wu ◽  
Cheng Lyu
Keyword(s):  
Upper Bound ◽  
Earth Pressure ◽  
Active Earth Pressure ◽  
Bound Solution ◽  
Upper Bound Solution ◽  
Seismic Active Earth Pressure

A Control Strategy and Upper Bound Solution for Non-Flat Tool Open Die Forging Automation

1999 ◽  
Author(s):  
T. J. Nye
Keyword(s):  
Control Strategy ◽  
Upper Bound ◽  
Sequence Generation ◽  
Bound Solution ◽  
Upper Bound Solution ◽  
Die Forging ◽  
Strategy Model ◽  
Model Predictions ◽  
Open Die Forging ◽  
Good Agreement

Abstract The open die forging process can provide a number of benefits if its costs can be made competitive through automation. This paper describes a control strategy for automated open die forging forming sequence generation. An upper bound solution for forging with radiused tools is developed, along with a method for using this solution to estimate forming results, a necessary component of the control strategy. Model predictions are compared to physical experimental data using plasticine, and show good agreement.

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