Answer
Saitin dindindin (nakasar filastik) yana faruwa lokacin da damuwa a kololuwar igiyoyin ruwa ya wuce ƙarfin amfanin kayan $\sigma_y$. Idan wannan ya faru a yanayin zafi mai yawa, yana iya yiwuwa saboda 'kwantar da hankali'. Ko da an ƙididdige damuwa yana ƙasa da $ \ sigma_y$ a cikin zafin jiki, ƙarfin yawan amfanin ƙasa kamar 17-7PH yana raguwa yayin da zafin jiki ke ƙaruwa. Wata yuwuwar ita ce 'over-compression' zuwa tsayayyen tsayi inda ainihin danniya $\sigma = \ frac{48 \cdot E \cdot t \cdot f}{\u03C0^2 \cdot D_m^2}$ ya wuce iyaka na roba. Don gyara wannan, bazara ya kamata ya zama 'saitaccen' (manne zuwa tsayi mai tsayi yayin masana'antu) don haifar da damuwa saura masu amfani, ko kayan yakamata a haɓaka su zuwa superalloy kamar Nimonic 90.
