金属材料疲劳小裂纹扩展速率试验方法编制说明.PDF

40 / 200 1 3 Explanat ion of t he St andar d T est M ethod f or M easur ement of Sm all Fat ig ue Cr ack Gr ow th R at e of M et allic M at er ials 1 1 1 1 2 , , , , 1 , 100095; 2 ) , 110034) 1 1 1 1 2 - , - , - , - , - DIN G Chuan f u L IU Jian zho ng HU Ben r un WU Xue r en L I Shu bai 1 Inst itut e of A eronautical M aterials , Beijing 100095, China; 2 Shenyang A ircraf t Indust rial g roup) CO . LT D. , Shenyang 1100 34, China) : , , , , 647 -95 K A ST M E a X3 : ; ; ; : T G 113 . 25: A : 100 1-438 1 200 1) 04-0040-04 Abstract : Com piling backgr ound of an aero-standard t est method f or measurem ent o f sm all f atig ue crack gro wt h r ates w as out lined. Several main t echnical problems f or t he method w ere demonst rat - ed , such as choice o f specim ens and m et hods o f monito ring small-cr ack , det ermi-nation o f three-di- 3 ) , - - - m ensional D st ress int ensit y f act or small crack non int eract ing crit er ia as well as physical sm all .