GTN

Ductile damage analysis for fracture in sheet metal forming based on GTN mesoscopic damage model

基于GTN细观损伤模型的板料成形过程损伤分析

Combining the experimental tensile test and finite element simulation , the inverse method is carried out to identify the GTN damage parameters .

采用逆向方法，将单向拉伸试验与有限元数值模拟相结合来确定GTN模型损伤参数。

It was reported that using the PEA protocol as the first choice for high-risk GTN , and had achieve good effect .

有报道使用PEA方案作为高危GTN的首选治疗方案，取得良好的疗效。

There is more error in simulating void growth under unaxisymmetry triaxial stress conditions using R-T model and GTN model .

用R-T模型、GTN模型模拟非轴对称三轴应力状态下材料微孔洞损伤演化有较大的误差。

Study on the shrinkage deformation of thin composite laminates during curing process ductile damage analysis for fracture in sheet metal forming based on GTN mesoscopic damage model

复合材料薄板的成型固化收缩变形研究基于GTN细观损伤模型的板料成形过程损伤分析

In this paper , the finite element method based on GTN model is used to investigate the ductile crack growth behavior in the three-point bending specimens of the dissimilar metal welded joint .

本文采用内嵌GTN损伤模型的有限元方法，建立了核电异种金属焊接接头三点弯曲试样的有限元模型，数值模拟延性裂纹的起裂和扩展行为。

In this paper , a large number of different materials are selected to do the small punch test . A deeply research was carried out about GTN model , equivalent stress and strain in finite element simulation of the small punch test .

本文在进行大量小冲杆试验的基础上，对小冲杆试验的有限元模拟中GTN模型及等效应力应变关系进行了深入的研究。

Methods The diameter of brachial arteries at rest , during reactive hyperaemia and after sublingual GTN in 63 subjects , consisted of 21 patients with essential hypertension , 21 patients with coronary heart disease and 21 controls .

方法应用7.0MHz探头检测原发性高血压（n＝21）、冠心病（n＝21）、和健康人（n＝21）休息时、反应性充血、舌下含服GTN后的肱动脉内径变化。

In this paper , on the basis of GTN mesotropic damage theory , the damage model considering the plastic anisotropy and Bauschinger effect is established suitable for the sheet metal forming . The numerical realization of the damage model is improved .

为此，本文基于GTN细观损伤理论，考虑了板料的塑性各向异性性能和包申格效应，建立了符合冲压成形特点的损伤模型，并对数值实现方法进行了改进。

Hydatidiform mole is a benign lesion . But it has the trend of malignant transformation . About 20 percent complete hydatidiform mole and 4 percent partial hydatidiform mole have the potential to develop into gestational trophoblastic neoplasia ( GTN ) .

葡萄胎属良性病变，但有恶变趋势，其恶变率为完全性葡萄胎20%，部分性葡萄胎4%。