GTN模型对于钢材的参数标定  

GTN model for calibration parameters of steel

作　　者：卢永飞[1,2] 

机构地区：[1]西北民族大学土木工程学院 [2]甘肃省新型建材与建筑节能重点实验室,甘肃兰州730030

出　　处：《中国建材科技》2016年第2期20-21,共2页China Building Materials Science & Technology

摘　　要：本文通过模拟两种缺口尺寸的圆棒试件的单向拉伸试验,并结合已有试验分析了GTN模型中各个参数对最终断裂结果的影响。结果发现该模型中的形核孔洞体积分数会导致承载力下降,临界孔洞体积分数越大,断裂点会相对靠后;断裂失效孔洞体积分数越大,材料失效后承载力下降的越慢。The tensile test of a round bar specimen with two kinds of notched dimensions was simulated in this paper, and the influence of various parameters on the final results of the GTN model is analyzed.The results showed that tile volume fraction of void fraction in the model can lead to the decrease of the bearing capacity,the fracture point is relative to the fracture point with the critical void volume fraction is more large, ; the bearing capacity of the material after failure decline slowly with the void volume fraction decrease.

关 键 词：断裂 梁柱节点 GTN 

分 类 号：TU43[建筑科学—岩土工程]