|
|||||
|
|
Fatigue life evaluation for carbon/epoxy laminate composites under constant and variable block loading |
|
| Authors: | PNB Reis JAM Ferreira JDM Costa MOW Richardson |
| Affiliation: | 1. University of Beira Interior, Electromechanical Engineering Department, Calçada Fonte do Lameiro, Edificío I das Engenharias, 6200-100 Covilhã, Portugal;2. CEMUC University of Coimbra, Mechanical Engineering Department, Polo II da Univ. de Coimbra, Rua Luís Reis Santos, Pinhal de Marrocos, 3030-788 Coimbra, Portugal;3. RCMI, Department of Mechanical and Design Engineering, University of Portsmouth, Anglesea Road, Portsmouth POI 3DJ, England, United Kingdom |
| Abstract: | This paper presents the results of current research on the fatigue life prediction of carbon/epoxy laminate composites involving twelve balanced woven bidirectional layers of carbon fibres and epoxy resin manufactured by a vacuum moulding method. The plates were produced with 3 mm thickness and 0.66 fibre weight fraction. The dog bone shape specimens were cut from these plates with the load line aligned with one of the fibre directions. The fatigue tests were performed using load control with a frequency of 10 Hz and at room temperature. The fatigue behaviour was studied for different stress ratios and for variable amplitude block loadings. The damage process was monitored in terms of the stiffness loss. The fatigue life of specimens submitted to block loading tests was modelled using Palmgren–Miner’s law and taking in to account the stress ratio effect. The estimated and experimental fatigue lives were compared and good agreement was observed. |
| Keywords: | A Carbon fibres A Structural composites B Mechanical properties B Fatigue D Damage mechanics |
| 本文献已被 ScienceDirect 等数据库收录！ | |