The Internet Archive has digitized a microfilm copy of this work. It may be possible to borrow a copy for reading.
Hu-Nan Chu. "Discussion: "Rational Analysis of Heat-Exchanger Tube-Sheet Stresses" (Yu, Yi-Yuan, 1956, ASME J. Appl. Mech., 23, pp. 468–473)." Journal of applied mechanics 24.2 (1957) 315