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Multimode Fatigue Criteria for Filled Non-crystalizing Rubber under Positive R Ratios | ||
| Journal of Applied and Computational Mechanics | ||
| دوره 9، شماره 4، دی 2023، صفحه 1049-1059 اصل مقاله (1.23 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22055/jacm.2023.43122.4027 | ||
| نویسنده | ||
| Robert Keqi Luo* | ||
| Trelleborg Antivibration Solutions, Leicester LE4 2BN, UK | ||
| چکیده | ||
| Antivibration isolators are made from both crystalizing rubbers and non-crystalizing rubbers. Their fatigue resistance is different. Although the recently developed effective tensile stress criterionhas been validated in crystalizing rubber under different R ratios (the ratio between the minimum stress value and the maximum stress value), its application to non-crystalizing rubbers has never been verified. In this study, this criterion was tested against a non-crystalizing rubber using two types of samples under R ≥ 0 conditions for 168 fatigue cases with different loading modes. Considering that a shape change may also cause fatigue damage, a new shear stress criterion was derived and subsequently tested. The unified S-N curves (2×102 - 3×106 cycles) obtained have achieved narrow bands with a scatter factor of 1.35 with a correlation coefficient R2 ≥ 0.90 using these two criteria. This potential novel approach could be more effective than the current methods, which use fitting functions with adjustable parameters determined from an additional experiment. This offers greater choices and flexibility to engineers in their selection of the most appropriate suited criteria for their design in anti-vibration applications. | ||
| کلیدواژهها | ||
| Rubber fatigue؛ Effective shear stress؛ Effective tensile stress؛ Damage criteria؛ R ratio | ||
| مراجع | ||
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