Fatigue failure characterisation of resistance-welded thermoplastic composites skin/stringer joints

被引：26
作者：
Dube, M. [1 ]
Hubert, P. [1 ]
Yousefpour, A. [2 ]
Denault, J. [3 ]
机构：
[1] McGill Univ, Dept Mech Engn, CREPEC, Montreal, PQ H3A 2K6, Canada
[2] Natl Res Council Canada, Aerosp Mfg Technol Ctr, Montreal, PQ H3T 2B2, Canada
[3] Natl Res Council Canada, Inst Ind Mat, Boucherville, PQ J4B 6Y4, Canada
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2009年 / 31卷 / 04期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Polymer-matrix composites (PMCs); Resistance welding; Fatigue; Failure analysis; Crack growth rate; LAP SHEAR COUPONS; MATRIX COMPOSITES; HEAT-TRANSFER; PART II;
D O I：
10.1016/j.ijfatigue.2008.03.012
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
An experimental investigation characterising the fatigue failure mechanisms of resistance-welded thermoplastic composites skin/stringer joints is presented. Unidirectional (UD) and quasi-isotropic adherends were welded using stainless steel meshes as heating elements. The specimen geometry consisted of a flange laminate, representing a stringer, welded onto a skin laminate. In order to avoid current leakage to the electrically conductive adherends, a ceramic-coated heating element (TiO2 HE) was used for welding the UD specimens and some of the quasi-isotropic specimens. The fatigue performance of the welded joints was investigated under three-point bending. An indefinite fatigue life was obtained at 40% and 35% of the static damage initiation load for the UD and quasi-isotropic specimens, respectively. The failure mechanisms were documented based on observation of the fatigue cracks initiation and growth. UD specimens failed at the weld interface while quasi-isotropic specimens showed delaminations both in the flange or skin laminates and at the weld interface. The TiO2 HE did not show any fatigue mechanical performance reduction. However, debonding at the weld interface was shown to occur between the metal mesh wires and the TiO2 coating instead of between the laminates and the weld. (C) 2008 Elsevier Ltd. All rights reserved.
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页码：719 / 725
页数：7
相关论文
共 29 条
  • [11] DUBE M, 2007, CANCOM
  • [12] DUBE M, 2007, SAMPE
  • [13] Eveno EricC., 1988, J THERMOPLAST COMPOS, V1, P322, DOI 10.1177/089270578800100402
  • [14] HOU M, 1992, PLAST RUB COMPOS PRO, V18, P205
  • [15] Hou M., 1992, Compos. Manuf, V3, P153, DOI 10.1016/0956-7143(92)90078-9
  • [16] Minguet P.J., 1996, COMPOSITE MAT TESTIN
  • [17] MINGUET PJ, 1995, 10 INT C COMP MAT 1
  • [18] Nijssen R.P. L., 2006, Contract. Rep. SAND2006-7810P
  • [19] Resistance welding of thermoplastic composites - an overview
    Stavrov, D
    Bersee, HEN
    [J]. COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2005, 36 (01) : 39 - 54
  • [20] STAVROV D, 2007, SAMPE
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