CAJ | 학술논문

采用微观数字散斑干涉技术和宏观剪切强度试验相结合，分析并讨论了杨木单板背面裂隙的存在对其胶合界面微观力学性能和宏观剪切强度的影响；采用淀粉糊、淀粉糊/木粉、豆胶3种封闭剂处理杨木胶合界面上的背面裂隙，探讨改性试样微观应变分布和宏观力学性能之间的关联。结果表明：存在背面裂隙的杨木单板胶合界面上的应变数值较大，达到1?5×10-3～4．0×10-3，复合材料整体的强度显著减小；不同封闭剂处理背面裂隙的试件，其胶合界面的应变显著大于未处理的试件；封闭剂处理后，杨木单板层积材干强度未能全部提高，湿强度却出现不同程度的下降。
채용미관수자산반간섭기술화굉관전절강도시험상결합，분석병토론료양목단판배면렬극적존재대기효합계면미관역학성능화굉관전절강도적영향；채용정분호、정분호/목분、두효3충봉폐제처리양목효합계면상적배면렬극，탐토개성시양미관응변분포화굉관역학성능지간적관련。결과표명：존재배면렬극적양목단판효합계면상적응변수치교대，체도1?5×10-3～4．0×10-3，복합재료정체적강도현저감소；불동봉폐제처리배면렬극적시건，기효합계면적응변현저대우미처리적시건；봉폐제처리후，양목단판층적재간강도미능전부제고，습강도각출현불동정도적하강。
Influence of lathe checks on microscopic mechanical properties of poplar veneer bonding interface and macro-scopic shear strength was examined by using microscopic digital speckle pattern interferometry combined with macroscopic shear testing in this paper. In addition, gelatinized starch, gelatinized starch/wood flour compound, soybean adhesive were used to modify lathe checks of poplar bonding interface, and the relationship of microscopic strain distribution and macroscopic mechanical properties of modified samples was discussed. The results showed that the strain values of bonding interface with lathe checks were bigger at the value of 1.5×10-3-4.0×10-3, and the whole composite strength decreased significantly. The strain values of bonding interface modified by different sealing treatment were re-markably bigger than unmodified samples, at the same time, not all dry shear strength increased while all wet shear strength deceased to varying degree.