Oluschinski: Created page with "{{Language_sel|LANG=ger|ARTIKEL=SENT-Prüfkörper}} {{PSM_Infobox}} SENT-specimen The Anglo-Saxon abbreviation SENT stands for “'''s'''ingle-'''e'''dge '''n'''otched '''t'''ension,” and the SENT-specimen is referred to in German as a single-edge notched tensile test specimen. FORCETOC ==Test specimen shape== {| border="0" |250px | {| border=0 |-valign="top" |W |– |specimen width |-v..."

2026-09-07T08:40:56Z

Created page with "{{Language_sel|LANG=ger|ARTIKEL=SENT-Prüfkörper}} {{PSM_Infobox}} SENT-specimen The Anglo-Saxon abbreviation SENT stands for “'''s'''ingle-'''e'''dge '''n'''otched '''t'''ension,” and the SENT-specimen is referred to in German as a single-edge notched tensile test specimen. __FORCETOC__ ==Test specimen shape== {| border="0" |250px | {| border=0 |-valign="top" |W |– |specimen width |-v..."

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{{Language_sel|LANG=ger|ARTIKEL=SENT-Prüfkörper}}
{{PSM_Infobox}}
SENT-specimen

The Anglo-Saxon abbreviation SENT stands for “'''s'''ingle-'''e'''dge '''n'''otched '''t'''ension,” and the SENT-specimen is referred to in German as a single-edge notched tensile test specimen.

__FORCETOC__

==Test specimen shape==

{| border="0"
|[[File:sent_1a.jpg|250px]]
|
{| border=0
|-valign="top"
|W
|–
|specimen width
|-valign="top"
|B
|–
|specimen thickness
|-valign="top"
|H
|–
|specimen length
|-valign="top"
|s
|–
|distance between the two points of load displacement
|-valign="top"
|N
|–
|notch width
|-valign="top"
|a
|–
|notch depth
|-valign="top"
|D
|–
|hole diameter for adapter
|-valign="top"
|F
|–
|force (load)
|-valign="top"
|M
|–
|distance for drilling to accommodate the displacement sensors (inductive)
|}
|}
{|
|- valign="top"
|width="50px"|'''Fig.''':
|width="600px" |Schematic presentation of the SENT-specimen
|}
 
''dimensions (according [1, 2]):''
 
W = 2 B
 
a = B
 
s = 3 W
 
D = W/3
 
c = W/3
 
d = 4/3 W
 
''typical dimensions for plastics [3]:''
 
W = 40 mm
 
H = 150 mm
 
B = 3...10 mm
 
s = 120 mm
 
a = 20 mm
 
N = 3 mm
 
D = 10 mm
 
M = 7 mm
 
''designation:''
 
SENT 10 <math>\rightarrow</math> B = 10 mm

==Determination equation==

{|
|-
|width="20px"|
|width="500px" | <math>f(a/W) = 1.99-0.41(a/W)+18.7(a/W)^2-38.48(a/W)^3+53.85(a/W)^4 \!\ </math>
|}

with 0<math>\leq</math>a<math>\leq</math>0.6

''geometry criterion for metals:''

{|
|-
|width="20px"|
|width="500px" | <math>B, a, (W-a) \geq 2.5 \bigg(\frac {K_I}{R_e}\bigg)^2</math>
|}

''geometry criterion for polymers:''

{|
|-
|width="20px"|
|width="500px" | <math>B, a, (W-a) \geq \beta \bigg(\frac {K}{\sigma_y}\bigg)^2</math>
|}

It is valid: ''R''e = <math>\sigma</math>y = [[Yield Stress|yield stress]] (yield point)

The geometry constant <math>\beta</math> depends on the material. (see also: [[Geometry Criterion|geometry criterion]], [[Fracture Mechanics|fracture toughness]])

==Application==

The SENT-specimen can be used, for example, to characterize the [[Crack Propagation|crack propagation]] behaviour of [[Thermoplastic Material|thermoplastic]] and [[Elastomers|elastomeric materials]] under [[Quasi-static Test Methods|quasi-static]] [[Stress|stress]].

A comprehensive selection of suitable specimens for [[Fracture Mechanical Testing|fracture mechanics testing]] of [[Plastics|plastics]] and [[Composite Materials Testing|composite materials]] is included in [[Specimen for Fracture Mechanics Tests|fracture mechanics specimens]].

==See also==

* [[Specimen for Fracture Mechanics Tests|Specimen for fracture mechanics tests]]
* [[Geometry Function|Geometry function]]
* [[Pure Shear-Specimen|Pure shear specimen]]
* [[RDE-Specimen|RDE-specimen]]
* [[Fracture Mechanics|Fracture mechanics]]

==References==

{|
|-valign="top"
|[1]
|[[Blumenauer, Horst|Blumenauer, H.]], Pusch, G.: Technische Bruchmechanik. Deutscher Verlag für Grundstoffindustrie, Leipzig Stuttgart (1993) 3rd Edition, (ISBN 3-342-00659-5; see [[AMK-Library]] under E 29-3)
|-valign="top"
|[2]
|Anderson, T. L.: Fracture Mechanics. Fundamentals and Applications, 3rd Ed., CRC Press, Boca Raton (2005) (ISBN 978-0849316562; see [[AMK-Library]] under E 8-2); DOI https://doi.org/10.1201/9781420058215
|-valign="top"
|[3]
|[[Grellmann,_Wolfgang|Grellmann, W.]], [[Seidler,_Sabine|Seidler, S.]] (Eds.): Polymer Testing. Carl Hanser, Munich (2022) 3rd Edition, pp. 231–236 (ISBN 978-1-56990-806-8; E-Book: ISBN 978-1-56990-807-5; see [[AMK-Library]] under A 22)
|}

[[Category:Fracture Mechanics]]
[[Category:Specimen]]

SENT-Specimen - Revision history