Tensile test (destructive material testing)

The tensile test is one of the most important methods for obtaining material parameters in mechanical engineering. In this video, we take a closer look at the test procedure and use the stress-strain diagram to explain the most important parameters such as (offset) yield strength, ultimate tensile strength, fracture strain, uniform strain, reduction of area at break and modulus of elasticity (Young's modulus). We explain the significance of these characteristic parameters and their use in practice.

00:00 specimens
01:32 test execution
02:55 elastic deformation
03:35 plastic deformation (Lüders strain)
04:34 yield point phenomenon
05:26 uniform plastic deformation
06:00 strain hardening
06:40 necking
07:18 stress
08:51 strain
09:43 stress-strain-curve
11:06 yield strength (yield point)
12:46 ultimate tensile strength
13:44 uniform strain
14:44 fracture strain (elongation at break)
17:05 reduction in area at break
18:16 yield-tensile-ratio
19:41 elastic modulus (Young’s modulus)
24:05 offset yield strength
25:25 summary
27:37 true stress-strain curve

[lucarovacchi]

Best video on the topic I could find so far. Excellent job !!!

[aneebachaudary]

Lucky to stumbled upon your channel, it's a lifesaver :)

[engintemel]

Perfect concept to teach tensile, thanks

[shreyaskumar]

That is a pretty detailed explanation. Thanks, it was helpful! :)

[sairishikesh]

AMAZING ANIMATION, EXPLANATION AND CONTENT!

[utilityzc]

Why does a highly ductile material ((eg. Gold) neck completely to a point, and not undergo void formation at center like in ductile material failure?

[utilityzc]

In tensile testing for a polycrystalline ductile material, why does the shear take place at 45 degree angle in 'cup and cone' fracture? will the shear angle not be different for different grains? Also, is the failure intergranular or transgranular? Does the failure take place finally due to breakage of atomic bonds or completely due to slip?
Will the failure be transgranular or intergranular in brittle polycrystalline material? Will the failure be because of breaking of atomic bonds in this case?