Transactions of Materials and Heat Treatment

Title：DROP IN LOAD AS CRITERION OF RUPTURE IN CUPPING TEST

Authors： Zhang Zhaotao Ping Shen(Beijing Institute of Aeronautics and Astronautics)

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year,vol(issue):pagenumber：1988,13(1):14-19

Abstract：

The appearance of crack has been adopted as criterion of rupture in cupping test fora long time. The scatter among test data is rather great and influenced greatly Dy operators. Drop in load is Presented as criterion of rupture in cupping test. A large number of tests show that the new criterion is Practicable. giving test data of small scatter and indepe ndent on operators. saving tine, strength and material, allowing constant punch (?)pee(?) and the automation of the test procedure.

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Reference：

[1] Erichsen A.,Verfahren und Vorrichtung zum Prufen von Metallblechen,德国专利号No.260160,1912年7月6日提出。
[2] 中华人民共和国国家标准.GB 4156-84,金属杯突试验方法。
[3] Ake Persson, Investigations into the reproducibility of the modifed Erichsen test, Sheet Metal Ind., December, 1969, 1092～1096
[4] L. R. Hawtin. etc, Erichsen test for formabilty of metal sheet. Shect Metal Ind., June, 1970, 533～543．
[5] John R. Newby. A practical look at biaxial stretch cupping tests. Sheet Metal Ind., March, 1977, 240～252．
[6] 尚波生.板材成形性模拟试验的研究--杯突试验北京航空学院硕士论文,1984年。
[7] 北京航空学院,金属薄板成形性能试验数据,委托单位:中国科学院金属研究所.1986年3月。
[8] 北京航空学院,金属薄板成形性试验数据,委托单位:第二汽车制造厂技术中心材料试验室.1986年8月。
[9] Kokkonen V.,and Nygren G., Invetigations into the accuracy of the Erichsen cupping test,Sheet Metat Ind, 1959, 167～178．

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