important property definitions (stress or strain?))
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21 Terms
A solid, liquid or gas that could cause harm to a person's health
What is a hazardous substance?
Material Safety data sheet (MSDS)
Where do you find safety information on a substances?
Plant hazard checklist
Where do you find safety information on machinery and equipment?
When you bend something and it springs back into its originals shape.
What is Elastic deformation?
When you bend something and it doesn't go back into its original shape.
What is Plastic deformation?
The amount of force that we are applying to the material
What is Stress?
When we apply force to a material to increase its length.
What is Shear stress?
The change in length that we see in a material
What is Strain?
Elastic deformation of stress. If this happens and then it bounces back.
What is Shear modulus?
The point where elastic deformation becomes plastic deformation
What is the Yield point?
The highest point on a stress strain graph - It tells us the strength of a material. The stronger the material the higher the UTS will be
What is the Ultimate tensile stress?
The amount of energy a material absorbs before it fails, fractures or breaks.
What is Toughness?
When stress is applied and it shows minor plastic deformation that increases over time
What is Creep?
When the amount of stress applied to a material decreases over time.
What is Stress relaxation?
High temperatures
Do strong bonds break at high temperatures or low temperatures?
Low temperatures
Do weak bonds break at high temperatures or low temperatures?
Neatly lined-up molecules vibrate minimally, not requiring much space for movement.
What is the definition of a solid?
A substance that forms to the shape of the container its in. its molecules vibrate rapidly and take up more space.
What is the definition of a liquid?
The increase in vibration of molecules take up more area and the there is more distance between each molecule.
What is the definition of a gas?
Atoms or molecules with an Irregular structure, arranged randomly with no repeating pattern.
What is the amorphous structure of molecules?
Atoms or molecules are arranged in a highly ordered, regular structure with a repeating pattern.
What is the crystalline structure of molecules?