摘要
本文通过对偏轴拉伸下破坏特点的分析,说明在特定最优偏轴角下的偏轴拉伸破坏十分接近于纯剪破坏,提出了测定完整(ι12～γ12)曲线的最优偏轴角拉伸试验方法。它概括了Chamis和Sinclair([1]-[3]的10°偏轴和Rosen[4]的45°偏轴拉伸方法,使偏轴拉伸法更完善并具有更普遍的意义。通过对1:1玻璃布/环氧、4:1玻璃布/环氧、7:1玻璃布/环氧三种玻璃钢的偏轴拉伸试验,得到与理论分析相当一致的结果,验证了这一方法的可靠性。
The fracture characteristics of fiber reinforced materials subjected to off-axis tensile load are observed to indicate that there is a certain angle in which direction the off-axis tensile fracture approximates well to pure shear fracture. A method of optimal angle for off-axis tensile test is then provided for determination of the shear stress-strain characterization of composites. Other testing methods, for example, [±45°]s off-axis tensile test suggested by Rosen or/and 10°off-axis tensile test suggested by Daniel and Chamis can be regarded as the specific case of,this method. The method provided in this paper, therefore, is seemed to be more perfect and has more general significance. Tests with various off-axis angles have been performed and the results are in good agreement with those predicted theoretically. Thus, the validity of this method is verified.
出处
《力学季刊》
1981年第1期55-64,共10页
Chinese Quarterly of Mechanics
