THE EFFECT OF SPECIMEN DIMENSIONS ON HIGH-STRAIN RATE COMPRESSION MEASUREMENTS OF COPPER

被引：42
作者：
GORHAM, DA
机构：
[1] Open University, Milton Keynes, MK7 6AA, Walton Hall
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 1991年 / 24卷 / 08期
关键词：
D O I：
10.1088/0022-3727/24/8/041
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The flow stress of many metals is known to vary more strongly with strain rate-epsilon. above a critical value epsilon-c. than below it. In this paper an analysis of previous authors' measurements on copper indicates that the value of epsilon-c. varies systematically with specimen size. An estimate of inertial stress shows that inertia may be an important mechanism behind this observation. Qualitative arguments suggest that deformation velocity, friction and wave propagation could also contribute.
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页码：1489 / 1492
页数：4
相关论文
共 20 条
[1]  
BUCHAR J, 1986, MECHANICAL BEHAVIOUR, P108
[2]  
CHIEM CY, 1988, IMPACT LOADING DYNAM, P57
[3]   THE DYNAMIC COMPRESSION TESTING OF SOLIDS BY THE METHOD OF THE SPLIT HOPKINSON PRESSURE BAR [J].
DAVIES, EDH ;
HUNTER, SC .
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 1963, 11 (03) :155-179
[4]   INFLUENCE OF STRAIN RATE ON MECHANICAL PROPERTIES AND DISLOCATION SUBSTRUCTURE IN DEFORMED COPPER SINGLE CRYSTALS [J].
EDINGTON, JW .
PHILOSOPHICAL MAGAZINE, 1969, 19 (162) :1189-&
[5]   A CONSTITUTIVE DESCRIPTION OF THE DEFORMATION OF COPPER BASED ON THE USE OF THE MECHANICAL THRESHOLD STRESS AS AN INTERNAL STATE VARIABLE [J].
FOLLANSBEE, PS ;
KOCKS, UF .
ACTA METALLURGICA, 1988, 36 (01) :81-93
[6]  
FOLLANSBEE PS, 1984, INST PHYS CONF SER, P71
[7]  
Gorham D. A., 1979, MECHANICAL PROPERTIE, P16
[8]   SPECIMEN INERTIA IN HIGH STRAIN-RATE COMPRESSION [J].
GORHAM, DA .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1989, 22 (12) :1888-1893
[9]  
GORHAM DA, 1991, IN PRESS
[10]  
HADDOW JB, 1965, INT J MECH SCI, V7, P657
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