Function
of Design
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Material
Properties
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1. Strength in bending
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Strengthness - The ability of a
material to stand up to forces being applied without it bending, breaking,
shattering or deforming in any way.
- Is defined as a material's ability to resist deformation under load.
The transverse bending test is most frequently employed, in which a rod
specimen having either a circular or rectangular cross-section is bent until
fracture using a three point flexural test technique. The flexural
strength represents the highest stress experienced within the material at its
moment of rupture.
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2. Resistance to twisting
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- Hardness - the property of a material to resist permanent indentation.
- Strengthness - The ability of a material to stand up to forces being applied
without it bending, breaking, shattering or deforming in any way.
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3. The ability of a sheet material to be stretched into a complex
curvature
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- Elasticity-ability of a deformed material body to return to its original shape
and size when the forces causing the deformation are removed.
- Ductility-is a solid material's ability to deform under tensile stress;
this is often characterized by the material's ability to be stretched.
Forming by using tensile forces to stretch the material over a tool or form
block, required materials with appreciable ductility.
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4. The ability to resist fracture from cracks at low temperatures
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- Fracture toughness is a property which describes the ability of a
material containing a crack to resist fracture
- Is a form of thermal cracking and results from a single drop in
temperature to an extreme low, below the fracture temperature of the
material.
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5. The ability to resist shattering if dropped on the floor.
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- Toughness is the property that enables a material to withstand shock
and to be deformed without rupturing.
- The act of violently breaking into small pieces.
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6. The ability to resist alternating cycles of rapid heating and cooling
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- Thermal shock resistance- material's ability to withstand rapid
changes in temperature.
- Is a technique that is used to improve the surface quality of a part,
while keeping the cycle time as short as possible.
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Monday 23 December 2013
PROBLEM 11.3 : MATERIALS SELECTION
Monday 16 December 2013
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