The phrase "a narrow crack" is correct and usable in written English.
It can be used to describe a small opening or fissure, often in a physical context.
Example: "The old wooden door had a narrow crack that let in a sliver of light."
Alternatives: "a slim gap" or "a tight fissure."
He found the pit and discovered a narrow crack leading into a jumble of rocks.
A narrow crack grew slowly behind it, as when you cut a hole in the ice with a saw.
In the early afternoon we climb a metal staircase and enter a narrow crack in the rock face to the amphitheatre, a massive open bowl hollowed out of the surrounding plateau.
However, the AMFRC specimen showed many vertical or diagonal cracks with a narrow crack width, and in particular, the specimen with 0.8%% fiber volume fraction did not show significant concrete spalling and macro cracks even after failure.
This paper proposes a method for simulating the heat transfer process of high pressure argon gas leaking through a narrow crack which causes the Joule-Thomson cooling effect (JT cooling effect).
On the other side, the larger the crack shape ratio (a/c), the longer the fatigue life, and the cutterhead life with a round crack (a/c = 1) is about 3 times with a narrow crack (a/c = 0.1).
These factors produce a long narrow crack along the edge of the overlapping zone causing premature failure.
In addition, when connected with the conduit through a very narrow crack, the hot water does not circulate, and the water in the hydrothermal reservoir can suppress boiling by hydrostatic pressure.
It is as though, for a moment, as she passes through the void – the narrow crack between languages, where there are no words to hold on to and nothing can be named – the self of the writer is not any more.
Hysteresis is apparently observed for Sep and SnO2 –C@Sep at a higher relative pressure range, which might be associated with the narrow crack aperture.
Contributions to failure anisotropy are identified as: (i) anisotropic initial void shape and growth; (ii) plastic behaviour including isotropic/kinematic hardening and plastic anisotropy; and (iii) nucleation at a second population of second-phase particles leading to coalescence via narrow crack regions.
