Effect of humidity on the indentation hardness and flexural fatigue behavior of polyamide 6 nanocomposite

被引：47
作者：
Rajeesh, K. R. [2 ]
Gnanamoorthy, R. [1 ]
Velmurugan, R. [3 ]
机构：
[1] IIndian Inst TechnolD&M Kancheepuram, Madras 600036, Tamil Nadu, India
[2] Indian Inst Technol Madras, Dept Mech Engn, Madras 600036, Tamil Nadu, India
[3] Indian Inst Technol Madras, Dept Aerosp Engn, Madras 600036, Tamil Nadu, India
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 12期
关键词：
Polymers; Nanocomposites; Indentation hardness; Flexural fatigue; ABRASIVE WEAR CHARACTERISTICS; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; CRACK-PROPAGATION; MOISTURE; TEMPERATURE; WATER; COMPOSITES; POLYMERS; STRESS;
D O I：
10.1016/j.msea.2010.01.070
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Humidity affects the mechanical properties of polymers and their composites. Understanding the influence of humidity on the strength, stiffness and fatigue characteristics will aid in better product design. The effect of relative humidity (RH) on indentation hardness and flexural fatigue behavior of polyamide 6 nanocomposites is reported. Indentation hardness and indentation modulus of the material reduces up to similar to 50% in the samples conditioned in water due to the plasticization and associated increased polymer chain mobility. Cantilever bending fatigue tests conducted at different relative humidity levels at constant displacement amplitude revealed increased fatigue life for polyamide 6 nanocomposites at high humidity. Hysteresis heating and molecular reorientation lowers the modulus during fatigue process and causes a reduction in the force amplitude at high humidity levels. The failure mechanisms at different humidity levels are discussed. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：2826 / 2830
页数：5
相关论文
共 23 条
[1]  
BRETZ EP, 1981, J MATER SCI, V16, P2070
[2]   FATIGUE CRACK-PROPAGATION IN CRYSTALLINE POLYMERS - EFFECT OF MOISTURE IN NYLON 66 [J].
BRETZ, PE ;
HERTZBERG, RW ;
MANSON, JA .
JOURNAL OF MATERIALS SCIENCE, 1979, 14 (10) :2482-2492
[3]  
CHEN CC, 1985, POLYMER, V163, P89
[4]   Effect of water absorption of the mechanical behavior of fiberglass pipes used for offshore service waters [J].
d'Almeida, J. R. M. ;
de Almeida, R. C. ;
de Lima, W. R. .
COMPOSITE STRUCTURES, 2008, 83 (02) :221-225
[5]   ENVIRONMENTAL DYNAMIC FATIGUE CRACK-PROPAGATION IN NYLON-66 [J].
ELHAKEEM, HA ;
CULVER, LE .
INTERNATIONAL JOURNAL OF FATIGUE, 1979, 1 (03) :133-140
[6]  
Gottfried Ehrenstein., 2001, POLYM MAT
[7]   The effects of water aging on the interphase region and interlaminar fracture toughness in polymer-glass composites [J].
Hodzic, A ;
Kim, JK ;
Lowe, AE ;
Stachurski, ZH .
COMPOSITES SCIENCE AND TECHNOLOGY, 2004, 64 (13-14) :2185-2195
[8]   The effect of ambient moisture and temperature conditions on the mechanical properties of glass fiber/carbon fiber/nylon 6 sandwich hybrid composites consisting of skin-core morphologies [J].
Ishiaku, US ;
Hamada, H ;
Mizoguchi, M .
POLYMER COMPOSITES, 2005, 26 (01) :52-59
[9]   Polymer nanotechnology: Nanocomposites [J].
Paul, D. R. ;
Robeson, L. M. .
POLYMER, 2008, 49 (15) :3187-3204
[10]  
RAJEESH KR, 2008, P 2 INT S ADV MAT PO
123