U.S. patent number 3,604,374 [Application Number 04/850,851] was granted by the patent office on 1971-09-14 for composite blast-absorbing structure.
This patent grant is currently assigned to United States Steel Corporation. Invention is credited to Harold E. Matson, William J. Riffe.
United States Patent |
3,604,374 |
Matson , et al. |
September 14, 1971 |
**Please see images for:
( Certificate of Correction ) ** |
COMPOSITE BLAST-ABSORBING STRUCTURE
Abstract
This invention relates to a protective panel for the blast
protection of a structure. The protective panel has an impact
member, a honeycomb member disposed opposite the impact member,
distendible side members defining with the impact member and the
honeycomb member a cavity, and a fluid hermetically sealed in the
cavity. The honeycomb member is secured to the panel. The impact
member is operable when a localized high-intensity force of an
explosion contacts the impact member to transmit the localized
high-intensity force of the explosion to the fluid. The fluid is
operable to convert the localized high-intensity force to a uniform
low-intensity force on the honeycomb member and the side members.
The honeycomb member is subjected to accordion-type crushing, and
the sidewalls deflect outwardly in bending and fracturing, thus
allowing the impact member to contact and deform the honeycomb
member and minimally deform the panel. Alternatively, a second
honeycomb member or a multiplicity of honeycomb members is
substituted for the cavity.
Inventors: |
Matson; Harold E. (Peters
Township, Washington County, PA), Riffe; William J.
(Carnegie Borough, PA) |
Assignee: |
United States Steel Corporation
(N/A)
|
Family
ID: |
25309276 |
Appl.
No.: |
04/850,851 |
Filed: |
August 18, 1969 |
Current U.S.
Class: |
109/81; 89/36.02;
109/49.5; 428/116; 428/911; 52/793.1 |
Current CPC
Class: |
F41H
5/045 (20130101); F41H 7/042 (20130101); F41H
5/0442 (20130101); F41H 5/02 (20130101); Y10T
428/24149 (20150115); Y10S 428/911 (20130101) |
Current International
Class: |
F41H
5/04 (20060101); F41H 5/00 (20060101); F41H
7/00 (20060101); F41H 7/04 (20060101); F41H
5/02 (20060101); F41h 005/04 (); B32b 003/12 () |
Field of
Search: |
;109/78-85,49.5
;52/615,618 ;89/36 ;296/31 ;161/41,404 ;114/10-14 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Bell; J. Karl
Claims
We claim:
1. A protective panel for the blast protection of a panel, said
protective having:
a. an impact member,
b. a honeycomb member disposed opposite said impact member and
having a cover member,
c. distensible side members defining with said impact member and
said cover member a cavity, and
d. a fluid hermetically sealed in said cavity,
1. said honeycomb member being secured to said,
2. said impact member being operable when a localized
high-intensity force of an explosion contacts said impact member to
transmit said localized high-intensity force of said explosion to
said fluid,
3. said fluid being operable to convert said localized
high-intensity force to a uniform low-intensity force on said
honeycomb member and said side members,
4. said honeycomb member being subjected to accordion-type crushing
by the uniform low-intensity force, and
5. said side members permitting the buildup of said uniform
low-intensity force on said honeycomb member before deflecting
outwardly in bending and fracturing, thus allowing said impact
member to contact and deform said honeycomb member and minimally
deform said panel.
2. The protective panel recited in claim 1 wherein said honeycomb
member has a plurality of corrugated core strips, each having a
crimping section joined to an adjacent connecting section.
3. The protective panel recited in claim 2 wherein said crimping
section has a crimping tab for connecting said crimping section to
said adjacent connecting section.
4. The protective panel recited in claim 1 wherein said honeycomb
member has a bonding section disposed between a crimping section
and a connecting section.
5. The protective panel recited in claim 4 wherein said bonding
section has a bonding tab.
6. The protective panel recited in claim 1 wherein said honeycomb
member has a top face sheet secured to said structure.
7. The protective panel recited in claim 1 wherein said honeycomb
member has a bottom face sheet defining one side of said cavity.
Description
BACKGROUND OF THE INVENTION
Heretofore, armored vehicles or the like have been protected by
conventional plate, construction, panels and the like shown in the
following U.S. Pats.: No. 2,733,177, to Meyer, issued Jan. 31,
1956; No. 3,157,090, to Ballu, issued Nov. 17, 1964; No. 3,243,898,
to Lewis et al., issued Apr. 5, 1966; No. 3,324,768, to
Eichelberger, issued June 13, 1967; and No. 3,351,374, to Forsyth
et al., issued Nov. 7, 1967.
OBJECTS OF THE INVENTION
It is the general object of this invention to avoid and overcome
the foregoing and other difficulties of and objections to prior art
practices by the provision of a protective structure for an armored
vehicle which protective structure:
A. improves blast protection for a panel,
B. is readily affixed to the panel to be protected, and
C. is strong but light enough to permit manual handling.
BRIEF SUMMARY OF THE INVENTION
The aforesaid objects of this invention and other objects which
will become apparent as the description proceeds, are achieved by
providing a protective panel for the blast protection of a
structure. The protective panel has an impact member, a honeycomb
member disposed opposite the impact member, distensible side
members defining with the impact member and the honeycomb member a
cavity, and a fluid hermetically sealed in cavity. The honeycomb
member is secured to the panel. The impact member is operable when
a localized high-intensity force of an explosion contacts the
impact member to transmit the localized high-intensity force of the
explosion to the fluid. The fluid is operable to convert the
localized high-intensity force to a uniform low-intensity force on
the honeycomb member and the side members. The honeycomb member is
subjected to accordion-type crushing, and the sidewalls deflect
outwardly in bending and fracturing, thus allowing the impact
member to contact and minimally deform the honeycomb member and the
panel.
Alternatively, a second honeycomb member or a multiplicity of
honeycomb members is substituted for the cavity.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
For a better understanding of this invention, reference should be
had to the accompanying drawings, wherein like numerals of
reference indicate similar parts throughout the several views and
wherein:
FIG. 1 is a fragmentary side view of a bottom panel and associated
side panels of an armored vehicle and showing the protective panel
of this invention for the bottom panel before the explosion;
FIG. 1A is a view similar to FIG. 1 showing the parts after an
explosion;
FIG. 2A is an enlarged fragmentary view of a portion of a core
strip of the honeycomb member;
FIG. 2B is a plan view of a corrugated core strip;
FIG. 3 is a view similar to FIG. 1 of an alternative embodiment
wherein a second honeycomb member is substituted for the cavity;
and
FIG. 3A is a view similar to FIG. 3 showing the parts after an
explosion.
Although the principles of this invention are broadly applicable to
protective panels for protecting structures and the like from
explosions and the like, this invention is particularly adapted for
use in conjunction with the protection of the bottom panel of an
armored vehicle and hence it has been so illustrated and will be so
described.
DETAILED DESCRIPTION
With specific reference to the form of this invention illustrated
in the drawings, and referring particularly to FIG. 1, a protective
panel for the blast-protection of a bottom panel 10 (FIGS. 1, 1A,
3, 3A) of an armored vehicle body 12 (FIGS. 1, 3) is indicated
generally by the reference numeral 14 (FIGS. 1, 1A).
This protective panel 14 has an impact member 16 (FIGS. 1, 1A, 3,
3A), suitably a MIL-S-12560 class II armored steel plate or the
like. A honeycomb member 18 (FIGS. 1, 1A, 2A) is disposed opposite
the impact member 16. Distensible side members 20 (FIG. 1),
suitably CRDQ (cold rolled drawing quality) carbon steel sheet or
the like, are welded together at 21 (FIG. 1), (FIG. 1) to the
impact member 16 and to the honeycomb member 18 to define a cavity
22 (FIG. 1) hermetically containing therein an incompressible
fluid, such as water or the like. The honeycomb member 18 is
secured to the bottom panel 10 by an adhesive 24, such as one of
the following:
---------------------------------------------------------------------------
Trademark or Trade Name Manufacturer
__________________________________________________________________________
FM American Cyanamid Co. EPON Shell Chemical Co. Scotch-Weld Brand
3M Company USS Nexus PQE-1 U.S. Steel Corp. Polymeric Material
__________________________________________________________________________
As shown in FIGS. 1, 2A, 2B the honeycomb member 18 is composed,
for example, of corrugated core strips 18a (FIGS. 2A, 2B) suitably
AISI steel 1010 to 1015, 40,000 to 50,000 yield, about 0.010 inches
thick and about 1-7/64 inches wide or the like. Each core strip 18a
(FIGS. 2A, 2B) has crimping sections 18b, connecting sections 18c
and bonding sections 18d. Each crimping section 18b is provided
with a crimping tab 18e (FIGS. 2A, 2B) at the top and bottom which
crimping tab 18e is crimped over the adjacently positioned
connecting section 18c (FIG. 2A) to secure the core strips 18a
together. The above adhesive 24 is applied to the bonding tabs 18f
on the top and bottom of the bonding sections 18d for securement of
the bonding tabs 18f to a top face sheet 26a (FIGS. 1, 1A, 2A, 3,
3A) and the bottom face sheet 26b (FIGS. 1, 1A, 2A, 3, 3A),
suitably the same material as the core strip 18a or the like.
OPERATION
The impact member 16 is operable when a localized high-intensity
force of an explosion contacts the impact member 16 to transmit the
localized high-intensity force of the explosion to the fluid in the
cavity 22. The fluid in the cavity 22 then converts the localized
high-intensity force to a uniformly applied low-intensity force on
the honeycomb member 18 and on the distensible side members 20. The
honeycomb member 18 is subjected to an accordion-type crushing. The
sidewalls 20 deflect outwardly in bending and eventually fracture
thus allowing the impact member 16 to contact and deform the
honeycomb member 18 and minimally deform the bottom panel 10 as
shown in FIG. 1A.
During the above sequence of events the protective panel 14 moves
from the position shown in FIG. 1 to the position shown in FIG.
1A.
ALTERNATIVE EMBODIMENTS
It will be understood by those skilled in the art that,
alternatively, as shown in FIGS. 3, 3A, a second honeycomb member
18b' (having a single facing sheet 26b between the first honeycomb
member 18a' and the second honeycomb member 18b') is employed in
lieu of the cavity 22 (FIGS. 1, 1A). Top facing sheet 26a on the
first honeycomb member 18a' and bottom facing sheet 26c on the
second honeycomb member 18b' are employed. An adhesive 24 may be
employed between the top face sheet 26a of the first honeycomb
member 18a' and the vehicle bottom 10 and the bottom face sheet 26c
of the second honeycomb member 18b' and the impact member 16.
The impact member 16 (FIGS. 3, 3A) is operable when a localized
high-intensity force of an explosion contacts the impact member 16
to transmit the localized high-intensity force of the explosion to
the second honeycomb member 18b'. The second honeycomb member 18b'
is operable to convert the localized intensity force to a uniform
low-intensity force on the first honeycomb member 18a' and the
bottom panel 10. The first honeycomb member 18a' and said second
honeycomb 18b' are subjected to accordion-type crushing, thus
allowing the impact member 16 to deform the second honeycomb member
18b', the first honeycomb member 18a' and minimally deform the
bottom panel 10 as shown in FIG. 3A.
SUMMARY OF THE ACHIEVEMENT OF THE OBJECTS OF THE INVENTION
It will be recognized by those skilled in the art that the objects
of this invention have been achieved by providing a protective
structure 14 (FIG. 1), 14.sup.3 (FIG. 3) for panel 10 of an armored
vehicle body 12 which protective structure 14, etc. provides
improved blast protection for the panel 10, is readily affixed to
the panel 10 to be protected, and is strong but light enough to
permit manual handling.
While in accordance with the patent statutes a preferred and
alternative embodiment of this invention has been illustrated and
described in detail, it is to be particularly understood that the
invention is not limited thereto or thereby.
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