MODELLING AND VALIDATION OF FATIGUE LIFE CALCULATION METHOD FOR SHORT FIBRE REINFORCED INJECTION MOULDED PARTS
MODELLING AND VALIDATION OF FATIGUE LIFE CALCULATION METHOD FOR SHORT FIBRE REINFORCED INJECTION MOULDED PARTS
复制标题
短纤维增强注塑件疲劳寿命计算方法的建模与验证
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
G. Pinter
中科院分区：
文献类型：
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作者：
A. Mösenbacher;J. Brunbauer;P. Pichler;Ch. Guster;G. Pinter
本文研究了30 wt.%研究了研磨玻璃纤维增强聚醚酰亚胺。经典的疲劳影响，如平均应力和应力梯度和额外的塑料相关的影响，如纤维取向，熔接线，水分和高温的特点。基于试验结果，推导出了描述局部应力概念对疲劳寿命计算方法影响的唯象模型。为了验证该方法，将从成型到疲劳失效的连续模拟链应用于真实的零件。将模拟结果与零件的疲劳试验结果进行了比较。结果表明，该方法可使S/N曲线的失稳位置与斜率相一致。疲劳强度也计算得相当好，但保守。
The quasi-static and fatigue behaviour of a 30wt.% milled glass fibre reinforced polyetherimide was investigated. Classical influences on fatigue such as mean stress and stress gradient and additional plastic-relevant influences such as fibre orientation, weld line, moisture and elevated temperature were characterized. Based on the test results, phenomenological models describing these influences on fatigue life calculation method by local stress concept were deduced. As validation for the method a continuous simulation chain from moulding to fatigue failure was applied to a real part. The simulation results were compared with fatigue tests of the part. It is shown, that the method leads to accordance of failure position and slope of the S/N-curve. Also fatigue strength is calculated quite well but conservative.