为验证现行夹层结构压剪试验方法对高剪切模量夹层结构的适用性,应用有限元分析了影响该试验方法测量精度的因素,结果表明加载金属板端部弯曲效应对试验精度有较大影响,对高剪切模量芯材的夹层结构影响更甚,当剪切模量高于100 MPa时其误差可超过6%.根据对试验系统参数的分析,提出了一种改进的压剪试验方法,改变加载方式降低弯曲效应,对于剪切模量小于500 MPa的夹层结构,可以将弯曲效应引起的误差降低到小于3%;同时发现新的加载方式对夹具尺寸参数变化的灵敏度降低,有利于提高试验的可靠性.
参考文献
| [1] | 黄涛.缝纫泡沫夹层复合材料力学性能研究[D].西安:西北工业大学,2004. |
| [2] | 杜龙.X-cot夹层复合材料力学性能研究[D].西安:西北工业大学,2007. |
| [3] | Marasco A I,Cartie D D R,Partridge I K.Mechanical properties balance in novel Z-pinned sandwich panels:Out-of-plane properties[J].Composites Part A:Applied Science and Manufacturing,2006,37:295-302. |
| [4] | Carstensen T C,Kunkel E,Magee C.X-Cor advanced sandwich core material[C]//33rd International SAMPE Technical Conference.Seattle,WA:Sikorsky Aircraft,2001:452-466. |
| [5] | O'Brien K T,Paris I L.Exploratory investigation of failure mechanisms in transition regions between solid laminates and X-cot truss sandwich[J].Composites Structures,2002,57:189-204. |
| [6] | Lingaiah K,Suryanarayana B.Strength and stiffness of sandwich beams in bending[J].Exp Mech,1991,31(1):1-7. |
| [7] | Steeves C A,Fleck N A.Collapse mechanisms of sandwich beams with composite faces and a foam core.loaded in threepoint bending,Part Ⅰ:Analytical models and minimum weight design[J].International Journal of Mechanical Sciences,2004,46:561-583. |
| [8] | Chen C,Harte A M,Fleck N.The plastic collapse of sandwich beams with a metallic foam core[J].Int J Mech Sci,2001,43(6):1483-1506. |
| [9] | McCormack T,Miller R,Kesler O,Gibson L.Failure of sandwich beams with metallic foam cores[J].Int J Solids Struct,2001,38(28/29):4901-4920. |
| [10] | Rice M C,Fleischer C A,Zupan M.Study on the collapse of pin-reinforced foam sandwich panel cores[J].Experimental MechaniCS,2006,46(2):197-204. |
| [11] | O'Connor D J.A comparison of test methods for shear properties of the cores of sandwich construction[J].J Test Eval,1989,17(4):241-246. |
| [12] | Grediac M,Dufort L.Experimental evidence of parasitic effects in shear test on sandwich beams[J].Exp Mech,2002,42(2):186-193. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%