公开(公告)号：US09810615B2

公开(公告)日：2017-11-07

申请号：US14365273

申请日：2012-11-27

Applicant: East China University of Science and Technology

Inventor： Fuzhen Xuan ,  Yupeng Cao ,  Hu Hui ,  Penning Li ,  Guozhen Wang

IPC: G06F11/30 ,  G01N3/62 ,  G01N3/40 ,  G06F17/50

CPC classification number: G01N3/62 ,  G01N3/40 ,  G01N2203/0067 ,  G01N2203/021 ,  G01N2203/0218 ,  G06F17/5018

Abstract: A calibration method for brittle fracture assessment parameters for pressure vessel materials based on the Beremin model includes selecting at least two types of specimens of different constraints, and calculating the fracture toughness values K0 corresponding to 63.2% failure probability for each type of specimens at a same calibration temperature by using the respective fracture toughness data. The method proceeds by obtaining the stress-strain curve of the material at the calibration temperature, generating finite element models for each type of specimens, and calculating the maximum principal stress and element volume of every element at K=K0 in each model. A series of values of m are assumed to compute a group of σu values for each type of specimens, and then m˜σu curves are plotted for each type of specimens. Brittle fracture assessment parameters are then determined for the material according to the coordinates of the intersection of the m˜σu curves.

公开(公告)号：US20140372060A1

公开(公告)日：2014-12-18

申请号：US14365273

申请日：2012-11-27

Applicant: East China University of Science and Technology

Inventor： Fuzhen Xuan ,  Yupeng Cao ,  Hu Hui ,  Penning Li ,  Guozhen Wang

IPC: G01N3/62 ,  G01N3/40 ,  G06F17/50

CPC classification number: G01N3/62 ,  G01N3/40 ,  G01N2203/0067 ,  G01N2203/021 ,  G01N2203/0218 ,  G06F17/5018

Abstract: A calibration method for brittle fracture assessment parameters for pressure vessel materials based on the Beremin model includes selecting at least two types of specimens of different constraints, and calculating the fracture toughness values K0 corresponding to 63.2% failure probability for each type of specimens at a same calibration temperature by using the respective fracture toughness data. The method proceeds by obtaining the stress-strain curve of the material at the calibration temperature, generating finite element models for each type of specimens, and calculating the maximum principal stress and element volume of every element at K=K0 in each model. A series of values of m are assumed to compute a group of σu values for each type of specimens, and then m˜σu curves are plotted for each type of specimens. Brittle fracture assessment parameters are then determined for the material according to the coordinates of the intersection of the m˜σu curves.

Abstract translation: 基于Beremin模型的压力容器材料的脆性断裂评估参数的校准方法包括选择不同约束条件的至少两种类型的试样，并计算相同于每种类型试样的63.2％失效概率的断裂韧性值K0 通过使用相应的断裂韧度数据来校准温度。 该方法通过在校准温度下获得材料的应力 - 应变曲线，为每种类型的样品生成有限元模型，并计算每个模型中K = K0处的每个元素的最大主应力和元素体积。 假设m的一系列值计算每种类型样本的一组＆sgr u值，然后对于每种类型的样本绘制m〜＆sgr; u曲线。 然后根据m〜＆ugr曲线的交点坐标确定材料的脆性断裂评估参数。