发明名称 |
Method of determining the impact fracture toughness KID by means of impact tests |
摘要 |
A method of determining the impact fracture toughness Kid of construction materials, for example structural steels or plastic materials, without the need of performing a load measurement at the striking hammer is provided. The elastic response of the specimen to the impact process, i.e. the dynamic stress intensity factor versus time curve, KIdyn(t), is determined in pre-experiments. The shadow optical method of caustics in reflection with an appropriate high strength steel is utilized for establishing this impact response curve. The dynamic fracture toughness for a given constructional material is then determined by performing an impact experiment and measuring the time to fracture tf. KId is obtained from the measured tf-value and the pre-established impact response curve which corresponds to the experimental test conditions. The presented measuring procedure is used for determining the dynamic fracture toughness of two different steels at different test temperatures.
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申请公布号 |
US4418563(A) |
申请公布日期 |
1983.12.06 |
申请号 |
US19810321144 |
申请日期 |
1981.11.13 |
申请人 |
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG |
发明人 |
KALTHOFF, JOERG F.;WINKLER, SIEGFRIED |
分类号 |
G01N3/00;G01N3/02;G01N3/30;(IPC1-7):G01N3/08 |
主分类号 |
G01N3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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