Neck propagation in polymers

Neck propagation in polymers
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聚合物中的颈伸

DOI:
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发表时间:
1974
期刊:
影响因子:
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通讯作者:
G. I. Barenblatt
G. I. Barenblatt
中科院分区:
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文献类型:
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作者:
G. I. Barenblatt

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在无定形和结晶结构的聚合物材料的拉伸试样中,在一定条件下观察到一个显著的现象,其包括如下。假设试验是在试验机中以固定试样的夹具的恒定速度进行的。首先,整个试样的延伸是均匀的,并且施加的应力与应变成比例地增长(图1的示意图中的部分I)。在
In tension specimens of polymeric materials of both amorphous and crystalline structure a remarkable phenomenon is observed in certain conditions, which consists in the following. Suppose that tests are carried out with a constant speed of the grips holding a specimen in a testing machine. At first the extension is homogeneous throughout the specimen and the applied stress grows in proportion to strain (portion I in the schematic diagram of fig. 1). At a