FATIGUE OF VISCOELASTIC POLYMERS .2. FRACTOGRAPHY

被引:27
作者
WHITE, JR [1 ]
TEH, JW [1 ]
机构
[1] UNIV LONDON QUEEN MARY COLL,DEPT MAT,LONDON E1 4NS,ENGLAND
关键词
D O I
10.1016/0032-3861(79)90252-0
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The results of a fractographic study of fatigue failure in viscoelastic polymers is presented. Tests were conducted on a spherulitic low-density polyethylene in reversed loading using non-symmetrical deformation conditions. The microfractographic features have been found to depend on the deformation programme, the temperature of the test and the position on the fracture surface. The latter has been related to the different stages of growth revealed by plotting crack-growth propagation data. As well as interspherulitic fracture, other mechanisms that are sometimes prevalent involve cold-drawing, (fibrillation), and/or lamellar reorientation. The appearance of fatigue fracture surfaces of a non-spherulitic low-density polyethylene, a high-density polyethylene and a plasticized poly(vinyl chloride) corroborate the structural interpretations proposed to account for the observations with the spherulitic low-density polyethylene. © 1979.
引用
收藏
页码:764 / 771
页数:8
相关论文
共 38 条
[1]   FATIGUE FRACTURE IN POLYETHYLENE [J].
ANDREWS, EH ;
WALKER, BJ .
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1971, 325 (1560) :57-+
[2]   CRACK PROPAGATION IN A STRAIN-CRYSTALLIZING ELASTOMER [J].
ANDREWS, EH .
JOURNAL OF APPLIED PHYSICS, 1961, 32 (03) :542-&
[3]  
ANDREWS EH, 1968, FRACTURE POLYMERS
[4]   ROLE OF HETEROGENEITIES IN CRAZING OF GLASSY POLYMERS [J].
ARGON, AS .
PURE AND APPLIED CHEMISTRY, 1975, 43 (1-2) :247-272
[5]   FRACTURE PROCESSES IN POLYSTYRENE [J].
BEAHAN, P ;
BEVIS, M ;
HULL, D .
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1975, 343 (1635) :525-&
[6]  
BIRD RJ, 1966, POLYMER, V7, P307
[7]   STRIATIONS ON POLYSTYRENE FRACTURE SURFACES FORMED AT ELEVATED-TEMPERATURE [J].
DOYLE, MJ .
JOURNAL OF MATERIALS SCIENCE, 1975, 10 (02) :300-305
[8]   STRIATIONS ON FRACTURE SURFACES OF GLASSY POLYMERS - COMMENT [J].
DOYLE, MJ .
JOURNAL OF MATERIALS SCIENCE, 1975, 10 (01) :159-164
[9]   MECHANISMS OF FRACTURE IN AN ORIENTED POLYSTYRENE [J].
DOYLE, MJ .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1975, 13 (01) :127-135
[10]  
DRAGAUN H, 1975, KUNSTSTOFFE, V65, P311