US3199963A - Corrugated sheet formed material - Google Patents

Corrugated sheet formed material Download PDF

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Publication number
US3199963A
US3199963A US23919762A US3199963A US 3199963 A US3199963 A US 3199963A US 23919762 A US23919762 A US 23919762A US 3199963 A US3199963 A US 3199963A
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United States
Prior art keywords
corrugations
sheet
mean plane
wave crests
sets
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Bengtsson Bo Gunnar
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
    • E04C2/326—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material with corrugations, incisions or reliefs in more than one direction of the element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • F17C3/027—Wallpanels for so-called membrane tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/232—Manufacturing of particular parts or at special locations of walls
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]
    • Y10T428/12417—Intersecting corrugating or dimples not in a single line [e.g., waffle form, etc.]

Definitions

  • the purpose of the present invention is to provide a corrugated sheet made of metal or other deformable but shape rigid material which i.a. is adapted for use in a shell as referred to above and wherein the folds or waves are arranged in such a manner that when the sheet is in the form a generally flat condition or in a curved condition having a radius of curvature which is very great as compared with the amplitude value of the corrugations, no essential tensile stress is developed in the sheet along the plane so formed.
  • this is achieved by so forming the corrugations that they consist of substantially straight wave crests departing in opposite directions from the mean plane of the sheet, the individual wave crests being so arranged relatively to each other that the crests departing in one direction are broken by crests extending at an angle, preferably right angles, to the first mentioned crest and that the length of the curve measured along the surface of the sheet between any two parallel planes extending at a right angle to the said mean plane, is always essentially the same when measured along two sectional lines in two further parallel planes extending at right angles to the mean plane and at right angles to the first mentioned two planes.
  • the individual corrugations may be formed in the most varying manners.
  • the wave crests may be flattened at the top and this top may be of a very short length along the crest, to such a degree that the wave crest may even present itself in approximately nipple form.
  • the wave crests extending at right Patented Aug. 10, 1965 angles relatively to each other may be positioned at different distances from the mean plane of the sheet, and they may be of different width at the top and/or they may have different side slope angles.
  • the half wave length i.e. the distance between the wave crest tops in a direction at right angles to the direction of length of the crests may differ. All such various features will be of influence to the properties which are characteristic to each individual sheet, and the choice of this or that particular feature will depend upon the material used as well as upon the intended use of the sheet.
  • FIGURE 1 is a perspective view of the sheet.
  • FIGURE 2 is a sectional view taken along the line A-A of FIGURE 1.
  • FIGURE 3 is a sectional view taken along the line BB of FIGURE 1.
  • a sheet formed material is formed with a plurality of mutually parallel wave crests 1 of short length and transversely to the same a plurality of series of crests 2 of short length and lesser height than the former.
  • the sheet of the example is formed with a slightly S formed profile of the hill sides of the crests 1, so as to give marked wave tops 11 and valley bottoms 12, whereas the hill sides of the crests 2 are approximately rectilinear, in sectional view.
  • Such a double corrugated sheet is capable of absorbing tensile and compressive forces along the mean plane of the sheet, independently of the direction of such forces relatively to the direction of length of the individual wave crests, without thereby giving rise to any noticeable marginal tensions or tensions in the sheet as a whole.
  • a corrugated sheet made from a flattened sheet of deformable material having three sets of corrugations therein, the corrugations of each set being substantially parallel, the corrugations of the first set extending alternately in opposite directions from the mean plane of said material with wave crests equi-distant from the mean plane of said material, said second and third sets of corrugations being parallel to each other and at an angle with respect to said first set of corrugations, the corrugations of said second and third sets being spaced from each other and extending alternately inwardly from said wave crests in said first set of corrugations onopposite sides of said mean plane respectively, the distance of the wave crests of said second and third sets of corrugations from said mean planebeing less than the distance of the wave crests of said first setof corrugations from the mean plane, all of said corrugations being formed without elongation of said material, whereby when said sheet is subjected to tensile and compression forces along its mean plane the angles of said corrugations will vary without altering
  • said second and third sets of corrugations are at right angles to said first set of corrugations.

Description

1965 B. G. BENGTSSON 3,199,963
CORRUGATED SHEET FORMED MATERIAL Filed NOV. 21, 1962 INV ENT OR 20 jezyiim/z BY 40m, 644, M Jam ATTORNEYS United States Patent s oiaims. (or. 29-183) In the transport and storing of great quantities of liquid substances at a temperature substantially departing from the ambient temperature, it is of the greatest importance to be able to utilize the mechanical strength and volume of the structure, such as a ships hull, wherein the tank or tanks containing the liquid substance are arranged, the shape of the tank or tanks being as far as possible adapted to the shape of the structure, and they are so arranged as to be supported by the strengthening elements of the structure. In this connection it has been considered if it is possible to provide the structure, such as a container or a ship, with internal insulation and line the insulation with a sealing shell, so that the insulation is not in contact with the liquid. Such proposition has, however, not been successful, due to the difficulties encountered from the thermal tensions appearing in a sealing shell at varying charges of liquid at a temperature which is strongly departing from the temperature at the outer face of the insulation. The possibility has been indicated of the use for this purpose of a corrugated foil, a shell, but it has been found to be diflicult to prepare such a shell in such a manner that the marginal tensions arising will be of a sufiiciently restricted value to be absorbed by the insulation at important temperature variations and also absorb the relatively big tensions simultaneously appearing in the shell proper due to thermal and/ or hydrodynamic load.
The purpose of the present invention is to provide a corrugated sheet made of metal or other deformable but shape rigid material which i.a. is adapted for use in a shell as referred to above and wherein the folds or waves are arranged in such a manner that when the sheet is in the form a generally flat condition or in a curved condition having a radius of curvature which is very great as compared with the amplitude value of the corrugations, no essential tensile stress is developed in the sheet along the plane so formed. When a sheet according to the invention is secured relatively to its environments and at the same time subjected to great variations in temperature relatively to the ambient temperature, the forces required for the purpose of securing the sheet are to be small and in all essentials dependent upon the bending strength of the folds or waves.
According to the invention this is achieved by so forming the corrugations that they consist of substantially straight wave crests departing in opposite directions from the mean plane of the sheet, the individual wave crests being so arranged relatively to each other that the crests departing in one direction are broken by crests extending at an angle, preferably right angles, to the first mentioned crest and that the length of the curve measured along the surface of the sheet between any two parallel planes extending at a right angle to the said mean plane, is always essentially the same when measured along two sectional lines in two further parallel planes extending at right angles to the mean plane and at right angles to the first mentioned two planes.
Hereby, the individual corrugations may be formed in the most varying manners. Thus, the wave crests may be flattened at the top and this top may be of a very short length along the crest, to such a degree that the wave crest may even present itself in approximately nipple form. Further, the wave crests extending at right Patented Aug. 10, 1965 angles relatively to each other may be positioned at different distances from the mean plane of the sheet, and they may be of different width at the top and/or they may have different side slope angles. Further the half wave length, i.e. the distance between the wave crest tops in a direction at right angles to the direction of length of the crests may differ. All such various features will be of influence to the properties which are characteristic to each individual sheet, and the choice of this or that particular feature will depend upon the material used as well as upon the intended use of the sheet.
When preparing such a corrugated sheet from a plane or slightly curved sheet, no portion of the sheet is subjected to any particular tensile stress along the plane proper to such portion, but the bending or folding operation leads to local bending stresses (effort de flexion) in the material in a direction transverse to the thickness of the sheet. If such a sheet is subjected to tensile or compression forces along the mean plane of the sheet, such forces will result in that the folds or bends, i.e. the corrugations are slightly straightened or made more acute, to the effect that no substantial membrane tensions are produced, and consequently no marginal tensions.
It is, however, obvious that in the preparation of a sheet according to the invention, it is not essential to start with a plane or slightly curved sheet. It is also possible to prepare the sheet directly with the desired corrugations by casting, pressing, welding or any other suitable method, dependent, i.a. of the material used.
With reference to the accompanying drawing, one practical embodiment of a corrugated sheet according to the invention is to be described, wherein the wave crests are extending at approximately right angles to each other. The drawing illustrates a portion of such a sheet.
FIGURE 1 is a perspective view of the sheet.
FIGURE 2 is a sectional view taken along the line A-A of FIGURE 1.
FIGURE 3 is a sectional view taken along the line BB of FIGURE 1.
As shown in the drawing, a sheet formed material is formed with a plurality of mutually parallel wave crests 1 of short length and transversely to the same a plurality of series of crests 2 of short length and lesser height than the former. As shown, the sheet of the example is formed with a slightly S formed profile of the hill sides of the crests 1, so as to give marked wave tops 11 and valley bottoms 12, whereas the hill sides of the crests 2 are approximately rectilinear, in sectional view.
Such a double corrugated sheet is capable of absorbing tensile and compressive forces along the mean plane of the sheet, independently of the direction of such forces relatively to the direction of length of the individual wave crests, without thereby giving rise to any noticeable marginal tensions or tensions in the sheet as a whole.
Of the possible fields of use of such a sheet, reference may be made to walls of tanks for the transport or storing of liquified gas, such as methane or propane at temperatures which are substantially lower than the ambient temperature.
I claim:
1. A corrugated sheet made from a flattened sheet of deformable material having three sets of corrugations therein, the corrugations of each set being substantially parallel, the corrugations of the first set extending alternately in opposite directions from the mean plane of said material with wave crests equi-distant from the mean plane of said material, said second and third sets of corrugations being parallel to each other and at an angle with respect to said first set of corrugations, the corrugations of said second and third sets being spaced from each other and extending alternately inwardly from said wave crests in said first set of corrugations onopposite sides of said mean plane respectively, the distance of the wave crests of said second and third sets of corrugations from said mean planebeing less than the distance of the wave crests of said first setof corrugations from the mean plane, all of said corrugations being formed without elongation of said material, whereby when said sheet is subjected to tensile and compression forces along its mean plane the angles of said corrugations will vary without altering the peripheral dimensions of said corrugated sheet.
2. A corrugated sheet as claimed in claim 1 wherein the wave crests of said first set of corrugations are flattened.
said second and third sets of corrugations are at right angles to said first set of corrugations.
References Cited by the Examiner UNITED STATES PATENTS DAVID L. RECK, Primary Examiner.
3. A corrugated sheet as claimed in claim 1 wherein 15 :HYLAND BIZQT, Examine"-

Claims (1)

1. A CORRUGATED SHEET MADE FROM A FLATTENED SHEET OF DEFORMABLE MATERIAL HAVING THREE SETS OF CORRUGATIONS THEREIN, THE CORRUGATIONS OF EACH SET BEING SUBSTANTIALLY PARRALLEL, THE CORRUGATIONS OF THE FIRST SET EXTENDING ALTERNATELY IN OPPOSITE DIRECTIONS FROM THE MEAN PLANE OF SAID MATERIAL WITH WAVE CRESTS EQUI-DISTANT FROM THE MEAN PLANE OF SAID MATERIAL, SAID SECOND AND THIRD SETS OF CORRUGATIONS BEING PARALLEL TO EACH OTHER AND AT AN ANGLE WITH RESPECT TO SAID FIRST SET OF CORRUGATIONS, THE CORRUGATIONS OF SAID SECOND AND THIRD SETS BEING SPACED FROM EACH OTHER AND EXTENDING ALTERNATELY INWARDLY FROM SAID WAVE CRESTS IN SAID FIRST SET OF CORRUGATIONS ON OPPOSITE SIDES OF SAID MEAN PLANE RESPECTIVELY, THE DISTANCE OF THE WAVE CRESTS OF SAID SECOND AND THIRD SETS OF CORRUGATIONS FROM SAID MEAN PLANE BEING LESS THAN THE DISTANCE OF THE WAVE CRESTS OF SAID FIRST SET OF CORRUGATIONS FROM THE MEAN PLANE, ALL OF SAID CORRUGATIONS BEING FORMED WITHOUT ELONGATION OF SAID MATERIAL, WHEREBY WHEN SAID SHEET IS SUBJECTED TO TENSILE AND COMPRESSION FORCES ALONG ITS MEAN PLANE THE ANGLES OF SAID CORRUGATIONS WILL VARY WITHOUT ALTERING THE PERIPHERAL DIMENSIONS OF SAID CORRUGATED SHEET.
US23919762 1961-11-23 1962-11-21 Corrugated sheet formed material Expired - Lifetime US3199963A (en)

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NO14228561 1961-11-23

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US (1) US3199963A (en)
BE (1) BE625246A (en)
CH (1) CH406743A (en)
DE (1) DE1409995A1 (en)
DK (1) DK123841B (en)
FI (1) FI42219B (en)
GB (1) GB1029309A (en)
NL (1) NL285854A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040081797A1 (en) * 2002-01-28 2004-04-29 Simmons Richard A. Structural polymer core assembly, method of manufacture and method of use
ES2279705A1 (en) * 2004-11-10 2007-08-16 Gaz Transport Et Technigaz Sealed, thermally insulated tank incorporated into the load-bearing structure of a ship
US10124555B2 (en) * 2014-04-22 2018-11-13 Celltech Metals, Inc. Sandwich structure including grooved outer sheet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US390941A (en) * 1888-10-09 Peters
US1517633A (en) * 1920-06-28 1924-12-02 Junkers Hugo Corrugated sheet metal
US2008640A (en) * 1934-03-17 1935-07-16 Nat Steel Car Corp Ltd Reenforced corrugated car ends
US2441476A (en) * 1944-08-10 1948-05-11 Glenn L Martin Co Reinforced structural sheet
US2481046A (en) * 1947-11-13 1949-09-06 Western Engineering Associates Panel structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US390941A (en) * 1888-10-09 Peters
US1517633A (en) * 1920-06-28 1924-12-02 Junkers Hugo Corrugated sheet metal
US2008640A (en) * 1934-03-17 1935-07-16 Nat Steel Car Corp Ltd Reenforced corrugated car ends
US2441476A (en) * 1944-08-10 1948-05-11 Glenn L Martin Co Reinforced structural sheet
US2481046A (en) * 1947-11-13 1949-09-06 Western Engineering Associates Panel structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040081797A1 (en) * 2002-01-28 2004-04-29 Simmons Richard A. Structural polymer core assembly, method of manufacture and method of use
US7297390B2 (en) 2002-01-28 2007-11-20 Simmons Richard A Structural polymer core assembly, method of manufacture and method of use
US20080135167A1 (en) * 2002-01-28 2008-06-12 Simmons Richard A Structural polymer core assembly, method of manufacture and method of use
US7857934B2 (en) 2002-01-28 2010-12-28 Eleison Composities, Llc Method of manufacture of a structural polymer core assembly
US20110061792A1 (en) * 2002-01-28 2011-03-17 Simmons Richard A Structural polymer core assembly, method of manufacture and method of use
US8449707B2 (en) 2002-01-28 2013-05-28 Innovative Composites Inc. Method of manufacturing a structural polymer core assembly
ES2279705A1 (en) * 2004-11-10 2007-08-16 Gaz Transport Et Technigaz Sealed, thermally insulated tank incorporated into the load-bearing structure of a ship
US10124555B2 (en) * 2014-04-22 2018-11-13 Celltech Metals, Inc. Sandwich structure including grooved outer sheet

Also Published As

Publication number Publication date
CH406743A (en) 1966-01-31
GB1029309A (en) 1966-05-11
NL285854A (en) 1900-01-01
DK123841B (en) 1972-08-07
BE625246A (en) 1900-01-01
DE1409995A1 (en) 1968-10-31
FI42219B (en) 1970-03-02

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