玻璃纤维增强铝合金层板(FMLs)的疲劳特征研究

来源 :2014年全国固体力学学术大会 | 被引量 : 0次 | 上传用户：flareleaf

【摘要】

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【作者】

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马玉娥王博杜永华

【机构】

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西北工业大学航空学院,西安710072

【出处】

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2014年全国固体力学学术大会

【发表日期】

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2014年11期

【关键词】

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玻璃纤维增强铝合金层板疲劳特性裂纹起裂寿命裂纹扩展寿命分层扩展

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　　根据国内外标准和参考文献，针对玻璃纤维增强铝合金层板(FMLs)的特点设计出测量疲劳寿命的试验件，进行了不同载荷下的R=0.1等幅拉-拉疲劳试验.试验过程中FMLs最先在表面铝层内出现裂纹，随后表面铝层可见多条裂纹.随着循环载荷数的增加，裂纹不断扩展，并在界面出现分层现象.得到了FMLs的疲劳裂纹起裂寿命和裂纹扩展寿命，绘制了FMLs和同样厚度碳纤维复合材料的S-N曲线并进行了对比.FMLs的疲劳寿命随载荷变化平缓，近似成对数趋势；而CCF300/5228A碳纤维复合材料层板在疲劳载荷最大值低于300MPa和高于400MPa时寿命差别很大.当Smax大于400MPa时寿命很短，而当Smax小于300MPa时寿命很长，这一阶段的S-N曲线几乎为水平直线.和同样尺寸的碳纤维复合材料试验的疲劳特性进行了对比分析，得到了FMLs的疲劳特征和寿命，为飞机结构设计师们提供了材料基础性能和信息.

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玻璃纤维增强铝合金层板(FMLs)的疲劳特征研究

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