含薄弱环节复合材料圆管耐撞性研究  

Crashworthiness of Composite Tubes with Crush Trigger

作　　者：黄建城[1] 王鑫伟[1] 袁张贤[1] 

机构地区：[1]南京航空航天大学飞行器结构力学与控制教育部重点实验室,南京210016

出　　处：《南京航空航天大学学报》2010年第4期423-428,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(50675100)资助项目

摘　　要：设计并制作了3种新型的复合材料吸能圆管薄弱环节,即内倒角、花冠型和端部开缝的薄弱环节。通过准静态轴向压溃试验研究了这3种薄弱环节对复合材料圆管耐撞性的影响,并将试验结果与不含薄弱环节及含外倒角薄弱环节的试验结果进行对比,以评估这些薄弱环节的引发效能。研究表明:外倒角、内倒角、花冠型和端部开缝薄弱环节都能有效改善复合材料圆管的耐撞性能;内倒角与外倒角薄弱环节具有相同的引发效能;花冠型和端部开缝薄弱环节的引发效能均优于外倒角薄弱环节。由于端部开缝薄弱环节加工简便,故它具有更好的工程应用前景。Three new crush triggers,called the internal bevel trigger,crown trigger and slot trigger are designed and made at one end of energy-absorbing composite tubes.Quasi-static axial compressive tests are conducted on the tubes to investigate the effects of the triggers on the energy absorption characteristics.Results are compared with that of energy absorption characteristics of tubes with an external bevel trigger and without any crush trigger for evaluating the triggering effects.It is found that all crush triggers can effectively improve the crashworthiness of the composite tubes and that the triggering effects of internal bevel trigger and external bevel trigger are similar.The triggering effects of the crown trigger and the slot trigger are superior to that of the external bevel trigger.And the slot trigger shows a better prospect of engineering application due to its convenient machining.

关 键 词：复合材料 耐撞性 能量吸收 薄弱环节 轴向压溃 

分 类 号：TB332[一般工业技术—材料科学与工程] O347.1[理学—固体力学]