Ramsay David B, Dickinson Gary H, Orihuela Beatriz, Rittschof Daniel, Wahl Kathryn J
U.S. Naval Research Laboratory, Washington, District of Columbia, USA.
Biofouling. 2008;24(2):109-18. doi: 10.1080/08927010701882112.
The mechanical properties of barnacle base plates were measured using a punch test apparatus, with the purpose of examining the effect that the base plate flexural rigidity may have on adhesion mechanics. Base plate compliance was measured for 43 Balanus amphitrite (=Amphibalanus amphitrite) barnacles. Compliance measurements were used to determine flexural rigidity (assuming a fixed-edge circular plate approximation) and composite modulus of the base plates. The barnacles were categorized by age and cement type (hard or gummy) for statistical analyses. Barnacles that were 'hard' (> or =70% of the base plate thin, rigid cement) and 'gummy' (>30% of the base plate covered in compliant, tacky cement) showed statistically different composite moduli but did not show a difference in base plate flexural rigidity. The average flexural rigidity for all barnacles was 0.0020 Nm (SEM +/- 0.0003). Flexural rigidity and composite modulus did not differ significantly between 3-month and 14-month-old barnacles. The relatively low flexural rigidity measured for barnacles suggests that a rigid punch approximation is not sufficient to account for the contributions to adhesion mechanics due to flexing of real barnacles during release.
使用冲压试验装置测量藤壶基板的力学性能，目的是研究基板弯曲刚度对附着力学的影响。对43只纹藤壶（= 白脊藤壶）的基板柔韧性进行了测量。柔韧性测量用于确定基板的弯曲刚度（假设为固定边缘圆形板近似）和复合模量。为了进行统计分析，藤壶按年龄和水泥类型（硬或粘性）进行分类。“硬”（基板薄而硬的水泥占比≥70%）和“粘性”（基板被柔顺、粘性水泥覆盖的比例>30%）的藤壶显示出统计学上不同的复合模量，但基板弯曲刚度没有差异。所有藤壶的平均弯曲刚度为0.0020 Nm（标准误±0.0003）。3个月和14个月大的藤壶之间，弯曲刚度和复合模量没有显著差异。藤壶测量得到的相对较低的弯曲刚度表明，刚性冲压近似不足以解释在脱离过程中真实藤壶弯曲对附着力学的贡献。
