TM 1-1500-204-23-11
Table 7-1.
General Description of Different Repair Types -- Continued
Constraints and
Description
Application
Type of Repair
Limitations
Limited structural
Bonded Reinforced
Sheet of thermoplastic
Various types of laminates
capability compared
Thermoplastic
material reinforced
subject to the limitations
with a iber-reinforced
with carbon, aramid
cited in the adjacent
thermosetting repair
or iberglass ibers.
column.
material. The high
Thermoplastic fused to
temperature required
surface of damaged part
to relow the thermoplastic
under heat and pressure.
may limit its application
May be used alone for a
to high-temperature
semi structural repair or
bismaleimide structures.
to create a bond between
the damaged part and a
repair patch of metal or
composite material.
Bonded Metal Repair
Thick carbon laminates.
Metal repair parts must
Repair formed by
(Stepped Laminated Foil)
be compatible with the
laminating titanium foil
parent structure (stiffness,
patches with a ilm or
expansion coeficient,
paste adhesive. Foil
chemical interaction, etc.).
patches may be stepped
Bonded foil may have
to create a tapered patch.
poorer properties than
Repair may be external or
a wet layup or pre-preg
lush.
repair.
Bonded Metal Repair
Laminates and sandwich
Metal repair parts must
Semi structural repair.
(Sheet Metal)
panel face sheets.
be compatible with the
Repair patch cut from
parent structure (stiffness
a single thickness of
expansion coeficient,
aluminum, titanium or
chemical interaction, etc.).
stainless steel sheet
Limited to structural
stock and bonded to the
shapes to which a
damaged part with a paste
metal patch can be
or ilm adhesive. Bond
formed. Elastic bondline
cured under heat and
required. Properties
pressure.
poorer than a wet layup
or pre-preg composite
repair. Primarily restricted
to low-risk emergency
repairs.
7-4