Properties of Materials - Group A by Veronica Pruim https://padlet.com/iv_stavila_pruim/n9dz36m5do0a Describe 5 properties: 1. density 2. strength 3. ductility 4. stiffness / elastic moduli 5. toughness. Include a picture, a definition and the Dutch translation. An example / video is a nice addition. en-us 2016-04-15 11:11:11 UTC 2023-09-13 08:44:07 UTC hello@padlet.com Density iv_stavila_pruim https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2271208983 Ezra, Timo, Robin , Olivier

the Dutch translation is dichtheid

Simply said, Density is a measurement that compares the amount of matter an object has to its volume.

Example:
An object with a lot of matter in a certain volume has a high density and an object with little matter in a high volume means it has a low density.

ρ = m / V

this means density equals mass divided by volume which is most commonly expressed in  kg / m3  or  g/cm3 

(2) Denser Than You Think - Science Experiment - YouTube]]> 2022-08-25 09:08:37 UTC https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2271208983 Strength https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2675101793 Julian, Maarten and Nick

According to the Oxford dictionary, strength is: "The capacity of an object or substance to withstand great force or pressure." Yield strength in particular, is the value when a material goes from elastic to plastic deformation.

sterke


https://www.youtube.com/watch?v=BHZALtqAjeM

 



]]> 2023-08-28 12:54:53 UTC https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2675101793 Stiffness https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2675102945 Lukas, Jarno and Jari

Stiffness = stijfheid.

Stiffness is the extent to which an object resists deformation in response to an applied force. Relationship to elasticity The elastic modulus of a material is not the same as the stiffness of a component made from that material.

Elastic modulus is a property of the constituent material; stiffness is a property of a structure or component of a structure, and hence it is dependent upon various physical dimensions that describe that component. That is, the modulus is an intensive property of the material; stiffness, on the other hand, is an extensive property of the solid body that is dependent on the material and its shape and boundary conditions.
For example, for an element in tension or compression, the axial stiffness is.

stiffness is S = F/δ, where F is the total load and δ is the bending deflection. Figure 5.7 (c) A beam of square section, loaded in bending. Its stiffness is S = F/δ, where F is the load and δ is the bending deflection.

https://www.youtube.com/watch?v=AcXRQx8DCl4]]> 2023-08-28 12:55:53 UTC https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2675102945 Ductility https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2675106221 Jeroen, Duncan, Geert

Ductility is a mechanical property that describes the ability of a material to be stretched, pulled or drawn without breaking. Ductility is an important consideration in engeneering and manufacturing it defines if a material is suitabel for certain manufacturing operations. ductility is the amount of stress a material can handle before it breaks.]]> 2023-08-28 12:58:53 UTC https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2675106221 toughness https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2675106335 Finn, Bodhi, Bas
dutch translation: Taaiheid
according to Wikipedia the definition of toughness is as follows: toughness is the energy of mechanical deformation per unit volume prior to fracture. To put it easy it is the amount of energy that a material, at a certain volume, can withstand without fracturing.

Toughness and strength are two material properties that are very similar, yet they are very different. when a material has strength, it can bend and deform. Tough materials can bend but they can't deform. when they exceed the yield point, they fracture. 

A few examples are glass, cookies or ceramics. If you put enough stress on a ceramic vase, it won't bend, it will fracture. The same with glass or chocolate.

(1) SENB fracture toughness test - YouTube]]> 2023-08-28 12:59:00 UTC https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2675106335 Hardness https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2675106406 • Daniël, Bram & Geert
• Hardheid
• 'The resistance of a material to localised plastic deformation.'                           
• (2) Rockwell Hardness Test - YouTube]]> 2023-08-28 12:59:03 UTC https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2675106406 Milling Machine iv_stavila_pruim https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2690557719 A milling machine removes material from a workpiece by rotating various cutting tools and moving them into the workpiece. Milling machines, either vertical or horizontal, are usually used to machine flat and irregularly shaped surfaces and can be used to drill, bore, and cut gears, threads, and slots.

]]> 2023-09-08 11:25:36 UTC https://padlet.com/iv_stavila_pruim/n9dz36m5do0a/wish/2690557719