FREQUENCY MODIFIED APPROACH FOR FATIGUE LIFE PREDICTION OF PMMA

HUANG AiFeng; YAO WeiXing; CHEN Fang

doi:10.16579/j.issn.1001.9669.2015.03.007

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FREQUENCY MODIFIED APPROACH FOR FATIGUE LIFE PREDICTION OF PMMA

更新时间：2022-09-22

- FREQUENCY MODIFIED APPROACH FOR FATIGUE LIFE PREDICTION OF PMMA
- Journal of Mechanical Strength Vol. 37, Issue 3, Pages: 529-532(2015)
- 作者机构：
  
  1. 南京航空航天大学无人机研究院
  2. 南京航空航天大学机械结构力学及控制国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2015.03.007
  CLC：
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HUANG AiFeng, YAO WeiXing, CHEN Fang. FREQUENCY MODIFIED APPROACH FOR FATIGUE LIFE PREDICTION OF PMMA. [J]. 37(3):529-532(2015)
DOI：

HUANG AiFeng, YAO WeiXing, CHEN Fang. FREQUENCY MODIFIED APPROACH FOR FATIGUE LIFE PREDICTION OF PMMA. [J]. 37(3):529-532(2015) DOI： 10.16579/j.issn.1001.9669.2015.03.007.

摘要

对有机玻璃进行了不同频率下的低周疲劳试验,得到了相应的S-N曲线和滞后环。试验结果表明,低频时,寿命随频率降低而减小。频率对滞后环面积影响不大,模量随频率降低有较明显降低。分析认为在低频率范围内,频率影响疲劳寿命的原因,有蠕变损伤随频率降低而增加和疲劳强度随应变率减小而降低两个方面。据此,用频率修正法描述不同频率的疲劳寿命并预测了低频段的疲劳寿命,与试验结果吻合较好。

Abstract

The fatigue tests of Plexiglas Resist45 PMMA at different frequencies were carried out and the S-N curves together with hysteresis loops were obtained. The results show that the fatigue life increases with frequency at low frequency domain. Creep damage and mechanical property rate-dependence are two attributes of frequency effect on fatigue life. And the frequency modified approach was employed to describe and estimate the fatigue life under different frequencies at low frequency domain and the calculated results are consistent with the experimental results.

关键词

高分子材料疲劳频率修正法寿命预测S-N曲线

Keywords

PolymerFatigueFrequency modified approachLife predictionS-N Curve

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