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【期刊论文】Storage of methane on wet activated carbon: influence of pore size distribution
柳永宁, Yaping Zhou a, Miao Dai b, Li Zhou b, *, Yan Sun b, Wei Su b
Letters to the Editor/Carbon 42(2004)1852-1855,-0001,():
-1年11月30日
A., Activated carbon, B., High pressure, C., Adsorption, D., Gas storage
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【期刊论文】CRACK ROTATION FACTOR AND DYNAMIC FRACTURE MEASUREMENT
柳永宁, LU YONGNING and SONG XIAOLONG
Engineering Fracture Mechanics Vol. 52, No.6, pp. 1029-1033, 1995,-0001,():
-1年11月30日
A linear relationship between the cross-head displacement S or pendulum displacement in the Charpy test and the crack mouth opening displacement V has been found in the paper for several polymers and a mild steel. The crack opening displacement δ is material and crack-length dependent and it decreases with increasing crack length. Through analysis the dynamic fracture toughness K1d can be measured from the P-S (the load and the cross-head displacement) curve, which is very easy to obtain in static or dynamic tests.
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柳永宁, Yongning Liu a, *, , Wei Kang a, Jiawen He a, Zuming Zhu b
Materials Science and Engineering A 343(2003)243-250,-0001,():
-1年11月30日
The interfacial shear strength of SiC fiber reinforced aluminum composite has been studied by the fragmentation test of single fiber reinforced model specimens after a number of fatigue cycles. The result shows that apparent stiffness of the testing machine is influenced by cyclic loading, which will affect the calculation of fiber strength by Clough's model. An extracting test in which fragmented fiber was extracted out by dissolving the matrix material in NaOH water solution indicated that the fiber strength did not lose via vacuum hot press treatment. This result contradicts the Clough's model. The experimental result showed that the critical length of the fiber increases a little after a few cycles of fatigue loading and thus, the interfacial shear strength decreases. The reason for this is that the thermal residual stress around the fiber developed during fabrication decreases in cyclic loading.
Fragmentation, Composite materials, Fracture, Fatigue
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