very clear and understandable, thanks for your help. You can also mention that the sad region indicated with the sad face :( refers to the zone where fracture occurs and the happy region indicated with the smiling face :) indicates the safe zone where the material will not undergo fracturing
Thankuu sir, you just simply explained the FLD. I'm working on a Nakazima test by simulation tool. I'll be glad if you share some information about Nakazima test. And if u can tell me about pamstamp 2g software
Very helpful video abou FDL! I΄m working on a paper about biaxial tensile test and I am searching on FDL of steel St14. Do you know where can I find one? Also, metal sheet thickness affects the curve? Thanks!
Glad that you appreciate the video. St14 is considered to be equivalent to Mild Steel Deep Draw Quality (DC04, DDQ, DDS, Cold roll 04, CR04) If you are a believer in the "Keeler-Goodwin" FLD then you can locate the FLC0 using this page www.eqsgroup.com/steel-formability-calculators/forming-limit-curve-calculator.asp and more to ready here: www.metalformingmagazine.com/magazine/article.asp?aid=10722 Sheet metal thickness raises the curve generally (thicker sheet should be able to experience greater surface area stretching before failure). Also, material processing such as cold rolling and annealing definitely also affect the location and shape of the curve. www.steelnumber.com/en/equivalent_steel_iron_eu.php?zname_id=3985 www.steelnumber.com/en/steel_composition_eu.php?name_id=201
-0.8 is 80% strain there are very few instances where initial deformation from flat stock to shape will exceed 80%, But the curve can fit whatever OBSERVATIONS are made. if it is observed then the published curve would include that strain value. - 0.8 % or strain of 0.008 in/in or mm/mm is well defined on the FLD space as is.
N-Value is the materials "Work Hardening Exponent" it is derived by performing a "curve fit" of the Load-displacement curve when plotted to True strain-stress space. From which it is possible over a portion of the curve to map the recorded data to a constitutive equation. Equations like the sigma = K(epsilon)^n where sigma is the true stress, epsilon is the true strain, K is the strength coefficient, and n is the work hardening exponent
very clear and understandable, thanks for your help. You can also mention that the sad region indicated with the sad face :( refers to the zone where fracture occurs and the happy region indicated with the smiling face :) indicates the safe zone where the material will not undergo fracturing
That was a great explanation.Thank you. I was looking for this as I have lab exercise.
thank you sir..........this video cleared my basic doubts of FLD
Excellent...
Thankuu sir, you just simply explained the FLD. I'm working on a Nakazima test by simulation tool. I'll be glad if you share some information about Nakazima test. And if u can tell me about pamstamp 2g software
Very helpful video abou FDL! I΄m working on a paper about biaxial tensile test and I am searching on FDL of steel St14. Do you know where can I find one? Also, metal sheet thickness affects the curve? Thanks!
Glad that you appreciate the video.
St14 is considered to be equivalent to Mild Steel Deep Draw Quality (DC04, DDQ, DDS, Cold roll 04, CR04)
If you are a believer in the "Keeler-Goodwin" FLD then you can locate the FLC0 using this page www.eqsgroup.com/steel-formability-calculators/forming-limit-curve-calculator.asp and more to ready here: www.metalformingmagazine.com/magazine/article.asp?aid=10722
Sheet metal thickness raises the curve generally (thicker sheet should be able to experience greater surface area stretching before failure).
Also, material processing such as cold rolling and annealing definitely also affect the location and shape of the curve.
www.steelnumber.com/en/equivalent_steel_iron_eu.php?zname_id=3985
www.steelnumber.com/en/steel_composition_eu.php?name_id=201
Great for minor strain wich has values in X axis is there a limit of values for this variable somebody told me that it has to be greater than -0.8?
-0.8 is 80% strain there are very few instances where initial deformation from flat stock to shape will exceed 80%, But the curve can fit whatever OBSERVATIONS are made. if it is observed then the published curve would include that strain value. - 0.8 % or strain of 0.008 in/in or mm/mm is well defined on the FLD space as is.
What is N value ?
N-Value is the materials "Work Hardening Exponent" it is derived by performing a "curve fit" of the Load-displacement curve when plotted to True strain-stress space. From which it is possible over a portion of the curve to map the recorded data to a constitutive equation. Equations like the sigma = K(epsilon)^n where sigma is the true stress, epsilon is the true strain, K is the strength coefficient, and n is the work hardening exponent