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Bending limit strain measurement method, bending crack determination method, and bending crack determination program

机译：弯曲极限应变测定方法，弯曲裂纹判定方法及弯曲裂纹判定程序

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摘要

PPROBLEM TO BE SOLVED: To provide a method for measuring accurately a bending limit strain when performing bending deformation having strain gradient in the plate thickness direction to a plate material; and to provide a bending crack determination method and a program therefor, capable of predicting and determining effectively bending breaking from a forming analysis result by a finite element method by utilizing a measured value. PSOLUTION: A bending limit strain is measured by putting a ruling line on a cross section of the plate material, and a bending forming portion and an elongation strain of an outermost layer bending center part are extracted from a forming analysis output result of a bending forming product made of the plate material, and existence of a bending crack is determined by comparing the elongation strain with the bending limit strain. PCOPYRIGHT: (C)2011,JPO&INPIT

机译：

要解决的问题：提供一种当对板材料进行在板厚方向上具有应变梯度的弯曲变形时，准确地测量弯曲极限应变的方法;并且提供一种弯曲裂纹确定方法及其程序，能够利用测量值通过有限元方法从成形分析结果中有效地预测和确定弯曲断裂。

解决方案：通过在板材的横截面上放置一条标线来测量弯曲极限应变，并从成形分析输出结果中提取弯曲形成部分和最外层弯曲中心部分的伸长应变。通过将伸长应变与弯曲极限应变进行比较，来确定由板材制成的弯曲成形产物，并且确定弯曲裂纹的存在。

版权：（C）2011，日本特许厅＆INPIT 展开▼

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公开/公告号JP5294082B2

专利类型
公开/公告日2013-09-18

原文格式PDF
申请/专利权人新日鐵住金株式会社;
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申请/专利号JP20090192863
发明设计人橋本浩二;田中康治;吉田博司;吉田亨;
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申请日2009-08-24
分类号G01N3/20;G01N3/28;B21D5;B21D22;
国家 JP
入库时间 2022-08-21 16:58:18

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