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in subjects: "Stresses Experiment-Hep"

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RTV 21 Displacements

A seal is needed for the cover of the Nitrogen Test Vessel in order to prevent leakage of the N{sub 2} gas. This seal is to be molded out of RTV 21. In this experiment, the Modulus of Elasticity of the RTV was sought after, and the displacements of the RTV due to various stresses were measured to see if they were large enough to provide a tight seal between the vessel and its cover.

Date: February 4, 1987

Creator: Kurita, C. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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LAr Dewar Coil Feed Frame Pipe Analysis (Structural Analysis of General Structures, SAGS)

This frame pipe analysis addresses the D0 LAr dewar Condenser tube (coil) feed pipe thermal contraction stresses and moments. The configuration is shown in PEI drawing C-32545, Rev 0, and the parameters detailed in the letter of November 20, 1989, located in appendix A. Note that all other thermal considerations for these condensing coils have been made in D0 EN 3740.512-234. The conclusion of this report is the feed lines, previously deemed appropriate without detailed analysis, have been demo… more

Date: January 31, 1990

Creator: Parker, A.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Summary of EC Superelement Results for OH Inter-Module Connecting Forces

The purpose of this report is to summarize the OH module connecting forces found as a result of the super-element modeling of the EC internal module structure. Although not presented here, this approach can also provide MH connecting forces and assembly deflections. This report includes only information on the OH connecting forces for various assumed connector schemes. The super-element machinery is in place to model other connector ideas, and provide information on overall deflections, MH conn… more

Date: May 26, 1987

Creator: Wands, R.; Weber, K. & Zurawski, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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D0 Silicon Upgrade: Estimates of the Deflections and Stresses of the Toshiba Cold Mass Support System

Tensile stresses in the Toshiba cold mass support links generated by the loadings the coil is subject to, and the deflections the coil experiences as a result of these loadings, are estimated. The axial links are conservatively designed and it should be reasonably easy to ensure that the three links at each end of the coil carry approximately equal loads. Small deviations from this ideal should not have great consequence as a system-of-three is somewhat forgiving in this regard. The use of prel… more

Date: November 22, 1995

Creator: Smith, R. P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Analysis of Rotary Bayonets and Piping

This report quantifies certain characteristics of the rotary bayonets and associated platform piping on the DO detector. The Vacuum Jacketed 4-inch x 6-inch and 1.5-inch x 3-inch and the 4-inch and 6-inch vacuum pipe articulating jumpers are considered here. The values of greatest importance are the forces required at the bayonet moment arms given in Table II and the stresses summarized in Table III. The forces required should be noted and checked that they are acceptable to the problem. The ma… more

Date: August 19, 1988

Creator: Chess, K. & Wendlandt, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Summary of Stress Analysis of CC Cryostat w/o Stiffening Rings

A finite element model of the CC cryostat was used to investigate the stresses resulting in this structure under internal pressure (30 psi at the top of the vessel increasing linearly to 40 psi at the bottom) and weight loadings. Figures 1 and 2 show the model and relevant physical dimensions. The results are given in Table I. The stresses were extracted. from the nodal stress output for individual elements. The variation of stress over the element is some indication of mesh adequacy in the abs… more

Date: February 4, 1986

Creator: Wands, R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Clean Room Spacewalk (Stairs and Walkway)

The CC Cryostat was moved to the cleanroom for the installation of modules: Work will continue on the top of the Cryostat with the help of platforms attached to both sides of the Cryostat. It was desired to access this platform from a nearby balcony via a walkway or 'spacewalk'. The spacewalk was to attach to the substructure of the east fold-down platform and across the balcony to some kind of staircase structure. The final design was a free standing stair frame and a rectangular box platform … more

Date: January 4, 1989

Creator: Jaques, Al

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Heat Exchanger Support Bracket Design Calculations

This engineering note documents the design of the heat exchanger support brackets. The heat exchanger is roughly 40 feet long, 22 inches in diameter and weighs 6750 pounds. It will be mounted on two identical support brackets that are anchored to a concrete wall. The design calculations were done for one bracket supporting the full weight of the heat exchanger, rounded up to 6800 pounds. The design follows the American Institute of Steel Construction (AISC) Manual of steel construction, Eighth … more

Date: January 12, 1995

Creator: Rucinski, Russ

Item Type: Report

Partner: UNT Libraries Government Documents Department

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LAB 3 Cleanroom Fan and Filters Analysis for the Supports

A 1400 lb blower fan and a 2700 lb filter box are to be supported at Lab 3. The support structure is a framework that suspends from the building wall to the cleanroom and to a washroom. The framework is made of welded 4-inch x 8-inch x 1/4-inch rectangular A36 steel tube. Welds are to be standard prequalified welds as by AISC. The main support frame is approximately 7-feet off the floor and welded onto the top of 10 columns. A deflection and stress study was performed on the planned structure. … more

Date: May 8, 1998

Creator: Cease, H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Analysis of OH Bolted Ear Connection

The D0 endcap calorimeter outer hadronic (OH) modules play a major structural role in the calorimeter assembly. The disrete modules, once connected together, form a ring within which other massive calorimetry will reside. It has been proposed that the connection of the OH at the downstream end be accomplished by extending the downstream endplates in the radial direction to form 'ears', and then through-bolting between adjacent ears as shown in Fig. 1. A single 2 1/4 in. dia. bolt is used, and p… more

Date: December 30, 1987

Creator: Wands, Bob

Item Type: Report

Partner: UNT Libraries Government Documents Department

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D-Zero Signal Board Feed-Thru, Instrumentation and Hi-Voltage Boxes

The three boxes being reviewed all operate at a pressure of less than 15 psig. Since they are relieved at 13 psig, they fall outside the scopes of the ASME Pressure Vessel Code, Fermilab Engineering Standard SD-37B, and Chapter 5031 of the Fermilab Safety Manual, therefore a Pressure Vessel Engineering Note showing compliance with SD-37B is not required. In calculating the design stresses, only the largest of the three boxes, the signal board feed-thru box, was analyzed. This box had the larges… more

Date: February 14, 1990

Creator: Luther, R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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D0 Silicon Upgrade: Cryogenic Lines at Refrigerator : Thermal Contraction Analysis of Four Cryogenic Utility Lines for the D0 Upgrade

The cryogenic lines GHE and LN2 contain two lines each, one for supply and the other for return. The tubing was stress analyzed per ASME code for pressure piping, standard ANSI/ASME B31.3. A commercial pipe stress analysis and design system by ALGOR{reg_sign} was used for the analysis along with the calculated maximum stress, 25,050 psi. They were all analyzed for combined pressure, thermal movement, and dead weight and all the stresses were below this allowable stress limit. There are sections… more

Date: June 23, 1995

Creator: Kuwazaki, Andrew

Item Type: Report

Partner: UNT Libraries Government Documents Department

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D0 Silicon Upgrade: Thermally Induced Stresses in the Components of a D0 Ladder in the Silicon Tracker

During the operation of the silicon tracker, the ladders will be in direct thermal contact with a cooling channel. The expected operating temperature of the cooling channel is 0 C, maintained by a cooling fluid whose bulk temperature is below 0 C. The assembly temperature is assumed to be 22 C. Due to the mis-match of material expansion coefficients, thermal stresses will be induced in the epoxy, beryllium, and silicon of the ladders. Calculations are presented here as well as some thermal cycl… more

Date: July 2, 1996

Creator: Ratzmann, Paul M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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D0 Silicon Upgrade: Scaffolding Plateform at Muon Chamber

The design for the scaffolding platform which will be connected to the muon chamber wall was analyzed for a load rating of 400 lbs. The platform is supported on each end and the calculations were done for the full 400 lbs. on the end of the horizontal beam. Both members were analyzed for maximum stresses and were compared to the allowable stress, and both members were found to be acceptable in accordance with the ASCE and AISC specifications. The only recommendation is for all the 3/8-inch stee… more

Date: July 28, 1995

Creator: Kuwazaki, Andrew

Item Type: Report

Partner: UNT Libraries Government Documents Department

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D0 Silicon Upgrade: Upgrade on Cryogenic Lines at Refrigerator

This is an upgrade to the thermal contraction analysis sound in D0 Engineering Note: 3823.115-EN-426. In this new design, a portion of the transfer lines are consolidated into one 6-inch vacuum jacket. Since all four transfer lines follow the same path and are of equal lengths, the stress analysis is performed on only one transfer line using the design system ALGOR{reg_sign}. The GHe Cooldown Supply line is analyzed for combined pressure, thermal movement, and dead weight and all the stresses w… more

Date: September 26, 1995

Creator: Kuwazaki, Andrew

Item Type: Report

Partner: UNT Libraries Government Documents Department

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D0 Silicon Upgrade: Lower Cleanroom Roof Quick Load Analysis

This engineering note documents calculations done to determine the margin of safety for the lower clean room roof. The analysis was done to give me a feeling of what the loads, stresses and capacity of the roof is prior to installation and installation work to be done for the helium refrigerator upgrade. The result of this quick look showed that the calculated loads produce stress values and loads at about half the allowables. Based on this result, I do not think that special precautions above … more

Date: November 17, 1995

Creator: Rucinski, Russ

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Finite Element Analysis of G-10 Flange/Board for the CC Feedthrough Box

The assembly of the stainless steel feedthrough box for the CC cryostat resulted in distortion of the slotted plates through which the circuit boards must be installed. Due to the o-ring grooves in the plates and the presence of small pump out passages it is difficult to machine the surface flat after installation. Installing the boards on the distorted surface requires distorting the g-10 flange and the board which is glued to it to match the surface distortion and achieve a seal. This results… more

Date: April 16, 1990

Creator: Wands, R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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OCH Strap Model Test

The OCH Model was stacked using the appropriate spacers between each absorber plate. Steel bars measuring 3-inch wide by 1/4-inch thick were welded, using 1/8-inch fillet weld, along all the corner edges, except the outer radius edges. On the outer radius, the straps were bolted to the end plates and to plates 9 and 17. The straps on the outer radius were also set in towards the center by approximately 3-inches. The spacers were then knocked out. Twelve strain gauges were mounted on the model. … more

Date: August 26, 1987

Creator: Weber, K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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LAr Dewar Condensing Coils at D0

These internal coils are used to condense and cool the gaseous argon contained in the LAr storage dewar at D0, at a rate not to exceed 40KW. The coolant is LN{sub 2}, piped in from another, similar, dewar of 36-feet higher elevation (see Diagram A). The specific design of the coils are outlined in Process Engineering drawing C-32545, attached. The material components are as follows. The internal coil piping material is constructed of 165-feet of 1 1/2-inch NPS schedule 40 pipe, of type 5083 alu… more

Date: December 5, 1989

Creator: Michael, J. & Clark, D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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D0 Silicon Upgrade: Upgrade Piping Loads on Cleanroom Roof

The proposed piping layout for the DO upgrade will run along the south wall of DAB. The cryogenic service pipe runs above the upper and lower cleanroom roofs and will need to be supported by the roofs beams. Calculations were done to determine the stresses in the I-beams created by the existing and additional loads due to the upgrade. Refer to drawing no. 3823.115-ME-317283 for drawings of the piping layout. Figure 1 shows the 'plan view' portion of this drawing. The weight of the individual li… more

Date: August 28, 1995

Creator: Sakla, Steve

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Design of the VLPC Cryostats

A short profile (40 cm), long length (2.50 m) rectangular helium cryostat has been designed, built and tested for maintaining electronic chips at a stable 9.0 Kelvin temperature. Heat load, and thermal stresses were major design considerations. The distance from room temperature to liquid nitrogen intercept temperature is only 8 centimeters. Liquid nitrogen temperature to liquid helium temperature occurs in 13 centimeters. An alloy known as Invar, 36% Nickel, balance Iron, was used to fabricate… more

Date: July 19, 2001

Creator: Rucinski, Russell A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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D0 Silicon Upgrade: Thermal Contraction Analysis of the Solenoid and VLPC Cryogenic Transfer Lines for the D0 Upgrade

The stresses developed in the solenoid and VLPC transfer lines have been investigated with the PipePlus v4.5 software package from Algor. 4 cases were considered for each transfer line and the following results were obtained. Pipe deflections have also been kept to a minimum by carefully considering the location of spider guides. Their placement should be as close as possible to the locations shown in Figures 4-7. With regard to chosen pipe sizes, the 2.5-inch OD Cu radiation shield in the sole… more

Date: June 6, 1995

Creator: Leicht, Todd M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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D-Zero End Cap Calorimeter Annular Piping Analysis

In accoradnce with the ASME Code for Pressure Piping, B31 version of Chemical Plant and Petroleum Refinery Piping, ANSI/ASME B31.3-1984 Edition, the maximum allowable stress for 304 stainless steel piping is 25,500 psi. This 'Allowable Displacement Stress Range' value was calculated using equation (1a) found on page 16 of the above mentioned reference. Each of the lines that comprise the End Cap Calorimeter (BC) piping were modeled on ANSYS and the appropriate constraints were applied. This was… more

Date: August 22, 1988

Creator: Kurita, C. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department