He introduces the concept of and “çentik” (notch) with an almost philosophical tone: “A perfectly homogeneous continuum does not exist. The engineer’s job is to decide when a geometric discontinuity is a notch or a detail.”
So next time you open that PDF, don’t just Ctrl+F for the formula. Read the footnotes. Ponder the little hand-drawn arrows. Somewhere between the Mohr circle and the Euler buckling load, you’ll understand why generations of engineers still whisper: “Omurtag yeter.” (Omurtag is enough.) If you enjoyed this analysis, check out the companion volumes: “Çözümlü Mukavemet Problemleri” (Solved Strength Problems) by the same author—the PDF of which is essentially the answer key to life. Mukavemet Mehmet H Omurtag.pdf
The PDF versions often have margin notes from students: “This is where I failed the first midterm.” Omurtag doesn’t give you a formula for every case. He gives you a method —and then a set of exercises where you must choose between Neuber’s rule, a finite element mindset, or simple Saint-Venant’s principle. Ask any Turkish mechanical or civil engineer about işaret kuralı (sign convention). They will immediately sketch Omurtag’s axis system: $x$ to the right, $y$ up, $z$ out of the page. But the brilliance is in the internal forces : normal force positive in tension, shear positive when it creates clockwise moment on the positive face. He introduces the concept of and “çentik” (notch)