Quick Beam Stress Question
Quick Beam Stress Question
(OP)
I am interested in the stress results of combined stresses in beam elements... in my attached example, I'm comparing the results from a "3166. Beam EndB Max Comb Stress" to the "3167. Beam EndB Min Comb Stress" output sets. The "3166...Max..." results shows a max stress at +1840 psi, and the "3167...Min..." shows a min stress at -2223.76 psi.
Is the max output set showing the true max stress (1840 psi). Or, is the higher absolute value of the max and min output sets (assuming the negative sign denotes compressed elements) the actual max stress ( ABS|-2223.76| psi)?
Thanks in advance.
See pics in the attachment
Is the max output set showing the true max stress (1840 psi). Or, is the higher absolute value of the max and min output sets (assuming the negative sign denotes compressed elements) the actual max stress ( ABS|-2223.76| psi)?
Thanks in advance.
See pics in the attachment





RE: Quick Beam Stress Question
I want to make it clear, my question is to better understand result outputs from FEMAP, and not to ask general stress analysis questions.
Hope I didn't waste anyone's time with a common sense question.
www.martinezandturek.com
RE: Quick Beam Stress Question
For beam elements tensile stresses are given a positive sign and compressive stresses a negative sign. The SA-MAX, SB-MAX, SA-MIN, and SB-MIN stresses are the maximum and minimum combined bending and axial stresses for each end, the MIN is related with compressive stress sign, not with the mínimum value.
Best regards,
Blas.
~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director
IBERISA
48011 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog de FEMAP & NX Nastran: http://iberisa.wordpress.com/
RE: Quick Beam Stress Question
"Is the max output set showing the true max stress (1840 psi). " ... it should be
"In this case, it is counter-intuitive that the "Max" stress isn't really my max stress if my "Min" output set has greater compressive stresses." ... max stress is purely the biggest +ve stress (or the smallest -ve stress, the one closest to zero); min stress is the largest -ve stress (the one furthest from zero) ...
Quando Omni Flunkus Moritati
RE: Quick Beam Stress Question
Much appreciated.
-Cheyne
www.martinezandturek.com