公开(公告)号：JP2003227784A

公开(公告)日：2003-08-15

申请号：JP2002024716

申请日：2002-01-31

Applicant: NAT AEROSPACE LAB

Inventor： YOSHIDA MAKOTO ,  NOSAKA MASATAKA ,  SUDO TAKAYUKI ,  KIKUCHI MASATAKA ,  SATO MASAKI ,  TAKADA HITOSHI

IPC: G01N3/12 ,  G01M3/20 ,  G01N3/00

Abstract: PROBLEM TO BE SOLVED: To provide a stress-testing method and a stress-testing apparatus for greatly improving the evaluation of a light material such as a compound material by allowing a stress state to be solved in a state of including the lamination structure of a shell-like specimen and end face treatment and obtaining the temperature dependency of the amount of permeation of helium. SOLUTION: A shell-like specimen 1 comprising a carbon-fiber reinforced resin-based compound material that is used for a thin shell structure is fixed to an apparatus body 11, and the pressure of a helium gas supplied to a pressure chamber 21 is allowed to operate on the recessed surface side of a dome section 2 in the shell-like specimen 1. The displacement in a top section 2a of the dome section 2 is detected by a laser displacement meter 12. The shell-like specimen 1 is cooled to an arbitrary temperature via a partition board 18 that is cooled by an extremely low-temperature fluid supplied to a cooling chamber 22. The amount of the helium gas through the shell-like specimen 1 is detected by a helium leakage detector 33 for sucking through a negative pressure chamber 30. COPYRIGHT: (C)2003,JPO