92 LLE Review, Volume 86 Introduction As part of its participation in the Stockpile Stewardship Program (SSP), LLE is studying the feasibility of using extended x-ray absorption fine structure (EXAFS)1 to characterize the properties of solid materials shocked at moderately high pressures (up to a few megabars). In particular, there is an interest in examining material properties since they affe...

All aircraft operate under vibration loads and these cause vibration-induced fatigue damage to the parts. Fatigue damages are dangerous because they occur suddenly without giving a warning before, for this reason need be carefully analyzed. In analysis, especially natural frequencies dampings must determined correctly, when match with frequencies, resonance is observed reduces life of part. stu...

IN TR O D U C TIO N The fact that the compressive strength of a soil is a function of the time required to reach the failure load has long been recognized. How­ ever, this area of soil mechanics has not been extensively explored and much work remains to be done, in order that the effects of this phenome­ non can be properly evaluated. The specific areas where this information would be of the gr...

outdoor experiments on a once-through single glazed solar air heater with perforated metal absorber plate were conducted to determine the practical effect of absorber plate porosity as well as suction air flow rate on the collector thermal efficiency and its total pressure drop. three aluminum absorber plates were made perforated by drilling circular holes with different diameter/pitch ratios i...