2106 Flashcards
The term composite is used to describe two or more
materials that are combined to form a structure that is
much stronger than the individual components.
Composite Structure
The simplest composite is composed of two elements:
Matrix and Reinforcing Materials
is generally in a liquid form that
serves as a bonding substance.
Matrix
is a solid form that provide the primary structural strength to the composite structure when combined in
a matrix
Reinforcing Materials
This manual developed by the aircraft Manufacturers that includes information prepared for the AMT or technicians who performs work on units, components and system while they are installed on the airplane.
AIRCRAFT MAINTENANCE MANUAL.
a chemical additives that quicken cure, or chemical reactions.
Accelerator
A material that are mixed into a two –part resin system to improve the properties of the systems.
Additives
A substance that is applied to two mating surfaces to bond them together by surface attachments.
Adhesive
Fibrous materials embedded in a resin matrix. The term
ADVANCED applied those materials, which have superior strength and stiffness and the process in which they are manufactures
Advance Composite
The weight of the fiber reinforcement per unit area of tape of fabric.
Area Weight
The term composite is define in FAA AC 4-214. A combination of two or more materials (reinforcing elements, fillers, and composite matrix binder), differing in form or composite on on a macro-scale.
Composite
A manual developed BY THE COMPONENT manufacturer and frequently adopted by the airframe manufacturer. A CMM is most frequently not approved by the FAA. Blanket approval comes through the AMM and SRM.
Component Maintenance Manual
The resistance to resist the crushing force.
Compressive Strength
An impurity of foreign substance present in the materials or environment that affects one or more property es of the materials, particularly adhesion.
Contaminant
A compression damage of the core.
Core Crush
to change the physical properties of the material by chemical reaction, by the application of catalyst , heat and pressure , alone or in combination.
Cure
Individual fibers woven together to produce cloth.
Fabric
Single strands of materials used reinforcement because of its high strength and stiffness
Fiber
A require document which is produced by the manufacturer. It has the parts and their part numbers exploded for identification.
ILLUSTRATED PARTS CATALOG.
One Fabric resin layer that is bonded to adjacent layers in the curing process.
Laminate
Persons performing a repair or alteration under parts 121 and 135, or repair stations certificated under part 145. As used in this AC, this term includes Maintenance Repair Organization(MRO), certificated repair stations (CRS), and operators’ maintenance facilities.
Maintenance Organization
The alignment of the fibers to the baseline set by the manufacturer for the perpendicular component
Orientation
The length of time that the resin, mixed with catalyst will be in a workable state.
Pot Life
a manual which developed by the manufacturer to cover all items not listed as minor, maintenance , including instructions for structural repair, major component removal, installation and adjustment set up. Etch.
Structural Repair Manual
The life span that a product will remain useful, and in FAA AC 43-214 define shelf life as the length of time a raw material may be in storage under specific conditions and
still meet the requirements of the applicable material specification, also known as storage
life.
Shelf Life
The cumulative length of time a material may be out of freezer storage, prior to curing, and still maintain the required processability characteristics and mechanical
properties.
Out Life
Types of Reinforcing Materials
Fiber Glass, Aramid, Carbon, Boron, Ceramic
Is made from a small strands of molten silica glass that are spun together & woven into cloth.
Fiberglass
3 Common Types of Fiberglass
E-glass S-glass C-glass
is a registered trademark of the El DuPont company
and its most widely used Aramid.
Kevlar
Grade of a Kevlar fibers
Kevlar grade 49
Kevlar grade 29
Kevlar grade 129
Is a very strong, stiff reinforcement and used for its rigid
strength characteristics.
Carbon
are made by depositing the element boron on a thin
filament of tungsten
Boron
are used when a high temperature
application is needed.
Ceramic
A manufacturer can design a part by using different types
of fiber combination (hybrid) to tailor a part for
strength or to reduce cost.
Hybrids
What are the types of Hybrid
Intraply hybrid
Interply hybrid
Selective placement
utilize reinforcing material that is woven from two
or more different fibers.
Intraply hybrid
uses two or more layers of different reinforcing
materials that are laminated together.
Interply Hybrid
Fibers may be selectively place to give greater strength , flexibility or reduced cost.
Selective Placement
Fabric Style
1) Non-Woven Fabric/ Unidirectional Fabric
2) Woven fabric / BI DIRECTIONAL FABRIC
3) Mat
Manufacturers construct honeycomb from the ff:
- Aluminum
- Kevlar
- Carbon
- Fiberglass
- Paper
- Steel
This core materials consist of six sided shape of a natural
honeycomb, which provide a core with a very high strength to weight ratio
Honeycomb
is a paper impregnated material which is widely used as
an advance composite core material
NOMEX
Kinds of a Resin systems
–Polyester resin systems
-Epoxy resin systems
-Polybutadiene resins
Polyester resin systems
used heat to form and set the shape of the part
permanently
Thermoset
Thermoplastic c resins use heat to form the part into
the desired shape is heated a second time, it will
flow to form another shape
Thermoplastics
Resin marix are two-part systems consisting of the
ff:
Resin and Hardener/Curing agent
This fabric are woven together in a number of weaves and weights and are more resistant to fiber breakout, delamination, and more damage tolerant than unidirectional materials
Woven Fabric
This fiber orientation in which all of the major fibers run in onedirection , giving strength in that direction is known as the unidirectional or the non woven fabric.
Non Woven
plain, satin, crowfoot
Weaves
is measure in thousandths of an inch or
millimeters
Thickness
is measured in ounces per square yards, or a
gram per square meter
Weight
is the number of yarns per inch of width in the
warp and fill direction
Count
s the yield or denier, twist and ply
level
Yarn Construction
not as strong as a unidirectional or woven fabric , and therefore is not commonly used in a repair work.
Mat
is at 45 to a warp threads, and can be formed into
contoured shapes .
Bias
The threads that run the length of the fabric as it comes off the bolt and designated at 0 , more threads and stronger than fill directions
Warp
Are those that run perpendicular to the warp fibers, designated as
90 and ____ are the threads that interweave with the warp threads.
Weft
It is parallel to the warp threads, and its been removed for all fabrication and repair works.
SELVAGE EDGE
are the fabrics that have the
resin system already impregnated into the
fabric.
Pre-preg
Parts of Honeycomb
Facesheet, adhesive and honeycomb
The two most common types of core materials utilized in sandwich
construction
Honeycomb and foam cores
