Elasticity measurement of unidirectional carbon fiber reinforced polymer laminates by water immersion ultrasonic sing-around method.
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概要
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Elastic constants of unidirectional carbon fiber reinforced polymer (CFRP) laminates are determined by water immersion ultrasonic sing-around method. The unidirectional CFRP has hexagonal symmetry, and the five independent stiffness constants (<I>C</I><SUB>11</SUB>, <I>C</I><SUB>12</SUB>, <I>C</I><SUB>13</SUB>, <I>C</I><SUB>33</SUB>, <I>C</I><SUB>44</SUB>) are derived from the two series of sing-around periods. In the one series, the fiber direction is set to be always perpendicular to the incidence-refraction plane. From the measurement result, <I>C</I><SUB>11</SUB>, <I>C</I><SUB>12</SUB> and <I>C</I><SUB>66</SUB> are obtained explicitly. In the other series, the fiber direction is set to be contained in the incidence-refraction plane. From this result, <I>C</I><SUB>13</SUB>, <I>C</I><SUB>33</SUB> and <I>C</I><SUB>44</SUB> are obtained by successive approximation using least square method.
- 一般社団法人 日本音響学会の論文
一般社団法人 日本音響学会 | 論文
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