ORNL-1771 - Oak Ridge National Laboratory

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DIMENSION D MAY BE GREATER OR LESS THAN d U PERIOD ENDING SEPTEMBER IO, 7954 U N GI. AS S I FI ED <strong>ORNL</strong>-LR--DWG 2851 Fig. 7.4. Apparatus for Obtaining a Pasitive Stress Ratio of u,/ca in o Tubular Specimen. (a) With- out thermocouple well. (b) With thermocouple well. b
ANP QUARTfRLY PROGHESS REPORT As before, the stress ratio is independent of the diameter a of the piston rod. Since the piston rod is in compression, however, it should be made large enough to prevent buckling. The bleed lines shown in Figs. 7.4~ and b should be kept open during testing to assure that no pressure leaks from the large-diameter chamber to the smaller one. A test rig has been built that imposes the con- dition rrt/oa = no. Strain measurements made with a strain-gage bridge fastened to the gage area showed that the friction in the system was negligible and that the only active stress was tangential. A specimen is now being tested at 1500°F under this stress cond it ion. There has been considerable speculation as to the possibility of a difference in the rote of cor- rosive attack of fused salts in contact with lnconel under tensile stresses as compared with lnconel in compression. In order to observe any difference, it is desirable that the compressive and tensile stresses be imposed on the same specimen and be of the same magnitude. One approach to this prob- lem is to test a specimen under pure bending con- ditions. This would ensure that the magnitude of the maximum tensile stress would always be equal to that of the maximum compressive stress during a given test. An apparatus which would produce this effect was also designed by Jordan, and a specimen is now being tested in o fused salt medium. A drawing of the specimen and the loading apparatus is presented in Fig. 7.5. If it is assumed that no friction occurs between pins C and D and the specimen, all the force P wi II be transmitted across section 1-1 by the link I_ and no axial force will exist in the specimen. Likewise, since link L is loaded axially, it cannot transmit any bending moment and therefore the specimen must resist any bending moment existing across section 1-1. The force in link L will be equal to P to satisfy the equilibrium of forces. The bending moment in the specimen will then be equal to the product of P and the horizontal distance between the centers of pins A and 6. In order to minimize variations inthe bending rrioment (and therefore stresses) in the specimen during a test, the horizontal distance between A and B should be held as nearly constant as possible. Since the specimen deformsunder load, the ends will rotate and some change in the distance AB must occur. In order to minimize the change, the pins A and B are placed with their centers slightly above and below, respectively, a horizontal 116 P SP UYCLASSIFIED <strong>ORNL</strong>-LR-DWG 2852 SPECIMFN Fig. 7.5. Apparatus for Testing a Sheet Specimen Under Pure ending Cod it ions. diameter. This will allow some rotation to occur with very little change in the horizontal distance. The apparatus shown in Fig. 7.5 has been con- structed. Strain gages were placed on the tension and compression sides of a specimen, and load was applied. In the range of loads contemplated in a creep test, the tensile and compressive strains were essentially of the same magnitude; thus very little friction existed between the pins and the specimen. HIGH-CONDUCT IV ITY -F IN SODIUM-TO -AIR RAD !AT0 R Developmental work has continued on a sodium- to-air radiator with fins of a high-thermal-conductivity material. The developmental effort includes in- vestigations of materials with high thermal conductivity, the development and testing of brazing
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Contract No. W-7405-eng-26 AIRCRAFT
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1. G. M. Adamson 2. R. G. Affel 3.
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197-198. Powerplant Laboratory (WAD
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FOREWORD This quarterly progress re
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PART II . MATERIALS RESEARCH 5 . CH
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Remote Metallography ..............
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ANP QUARTERLY PROGRE.S.5 REPORT ver
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AMP QUARTERLY PROGRESS REPORT A dev
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part I REACTOR THEORY, COMPONENT DE
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AMP QUARTERLY PROGRESS REPORT After
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ANP QUARTERLY PROGRESS REPORT the A
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ANP QUARTERLY PROGRESS REPORT 67 g
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ANP QUARTERLY PROGRESS REPORT appro
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ANP QUARTERLY PROGRESS REFORT be si
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ANP QUARTERLY PROGRESS REPORT TABLE
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ANP QUARTERLY PROGRESS REPORT - 22
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in the ZPU system, While this arran
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I ORNL-LR-DWG 3092 CALCULATIONS EXT
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Power level TABLE 2.6. COMPARISON O
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PERIOD ENDING SEPTEMBER JO, 1954 Fi
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I R j I Fig. 2.7. Surfaces of Beryl
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that will permit remote, momentary
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sump in that it must be sufficientl
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J Fig, 3.4. Inconel Forced-Circulat
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- PERIOD ENDING SEPTEMBER 10, 1954
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from 18 to 31 so that tests of long
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A A Fig. 4.1. First Reflector-Moder
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- 40 32 c 3 24 A F! P ._r >- k > ir
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with and without 0.OZin.-thick cadm
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Part II MATERIALS RESEARCH
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ANP QUARTERLY PROGRESS REPORr propo
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ANP QUARTERLY PROGRESS REPORT appar
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ANP QUARTERLY PROGRESS REPORT urani
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ANP QUARTERLY PROGRESS REPORT seems
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ANP QUARTERLY PROGRESS REPORT ~~ -
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0 20 40 60 80 IO0 120 140 160 I, Di
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... Two configurations, a single du
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The thermal-neutron flux (Fig. 13.2
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E-7 1 O6 I 5 - - L I ___- 2 f o5 2
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TIME (rnin) PERIOD ENDING SEPTEMBER
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. - ., . ....._____... - PERiOD END
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io3 5 .--w 2 _J U 0 0 >- " 2 2 40 t
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PERIOD ENDING SEPTEMBER 10, 1954 Fi
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part IV APPENDIX
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REPORT NO. ~~-54-a-10 C F-54-6-4 CF
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