Auslegung von Probekörpern aus Hartschaum zur Ermittlung der biaxialen Zugfestigkeit
Auslegung von Probekörpern aus Hartschaum zur Ermittlung der biaxialen Zugfestigkeit
复制标题
设计硬质泡沫试样以确定双轴拉伸强度
DOI:
10.1007/s10010-014-0175-9
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Dierkes
中科院分区:
文献类型:
--
作者:
Kolupaev;Becker;Massow;Dierkes
At present parts made of hard polymer foams have many application. The design of these components is however based on the strength values gained primarily from tests on specimens under tension, compression, torsion and hydrostatic compression. Further loading conditions are required for the validation of an adjusted strength hypothesis appropriate for the description of the material behavior. This is especially important for multi-axial tension: there are almost no measurements existing that consider balanced biaxial and hydrostatic tensile loads.First, a suitable experimental setup is developed, which can be realized with a conventional tensile testing machine. In addition to the balanced biaxial stress state further biaxial tension stress states can be generated.The simple manner of force distribution requires a special form of the specimen. The following paper describes the design of two different hard foam specimens. The foam is considered as quasihomogeneous isotropic material.Linear elastic behavior of the foams is assumed for the dimensioning of the specimen. The stresses arising in the specimen under loading are assessed with the strength hypothesis ofMohr–Coulomb. The maximal stress occurring in the notches between the locations of force introduction are minimized by the geometry of the specimen, in order to assure failure in the test area. The dimensions of the specimens are adapted to the commercially produced foam blocks.Failure at hydrostatic tension unfortunately can hardly be realized. Based on the experimental results from tension and balanced biaxial tension, the estimation of the hydrostatic stress is proposed and can be is also considered in the dimensioning of the test specimens.
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DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
H. E. Hjelm
通讯作者:
H. E. Hjelm
影响因子:
1.2
作者:
M. Brieu;J. Diani;N. Bhatnagar
通讯作者:
M. Brieu;J. Diani;N. Bhatnagar
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
G. Dean;C. Forno;A. Johnson;D. Dawson
通讯作者:
D. Dawson
DOI:
--
发表时间:
1969
期刊:
影响因子:
--
作者:
B. Benjamin
通讯作者:
B. Benjamin
DOI:
--
发表时间:
1967
期刊:
影响因子:
--
作者:
C. R. Hazell;J. Marin
通讯作者:
J. Marin