对铺设角分别为0°、30°、45°、90°的玻璃纤维增强不饱和聚酯树脂单向板进行拉-拉疲劳试验,得到不同铺设角玻璃纤维增强不饱和聚酯树脂（GFRP）单向板疲劳数据,通过分析不同铺设角单向板中值S-N曲线及正则应力-寿命曲线特点,得到了单向板疲劳性能随铺设角变化的关系。并且基于对不同铺设角单向板疲劳断口的宏观及微观形貌的分析,研究了铺设角对单向板的疲劳损伤机制、失效模式的影响。分析表明,对应于不同的铺设角,单向板存在不同的失效机制,从而导致不同形式的损伤模式。
The fatigue tests were conducted for the glass fiber reinforced unsaturated polyester resin（GFRP） unidirectional laminates with 0°,30°,45° and 90° ply angles respectively.The characters of mean S-N curves and normalized stress versus life curves were investigated with the fatigue test data,and the relationship of the ply angle and fatigue property was obtained.Then,based on the SEM and macro appearances of fatigue fractures,the fatigue failure mode and fatigue failure mechanism for unidirectional laminates with different ply angles were analyzed.As a result,the different combinations of failure mode,which are corresponded to the different failure control mechanisms,are summarized with respect to ply angles.
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