Abstract This paper investigated static and fatigue bending behavior of sandwich beams using glass fiber reinforced polymer (GFRP) as skins and webs while balsa wood as core The failure modes, S-N curves, load-deflection behavior and stiffness degradation were obtained and compared The results showed that the fatigue failure modes of web reinforced sandwich beams varied with the web setting and load grade The web setting changed the failure mechanism and the materials were utilized in varying degrees in different specimens Fatigue life model based on damage modulus was proposed and proved appropriate to predict the fatigue damage and ultimate life.

中文翻译：

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腹板增强GFRP-轻木夹芯梁弯曲疲劳行为及寿命预测

摘要 本文研究了以玻璃纤维增​​强聚合物 (GFRP) 为表皮和腹板，以轻木为芯的夹层梁的静力和疲劳弯曲行为，获得并比较了破坏模式、SN 曲线、载荷-挠度行为和刚度退化。腹板加强夹芯梁的疲劳破坏模式随腹板设置和载荷等级而变化腹板设置改变了破坏机制，不同试件中材料的利用程度不同提出了基于损伤模量的疲劳寿命模型并证明适用于预测疲劳损伤和最终寿命。