树脂基复合材料内部离面位移场和应变场分布的动态测量  

Dynamical measurement of out-of-plane displacement field and strain field inside resin composite

作　　者：周延周[1] 朱文卓[1] 董博[1] 白玉磊[1] 彭义[1] 

机构地区：[1]广东工业大学自动化学院,广东广州510006

出　　处：《光学精密工程》2014年第12期3217-3223,共7页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.11072063);广东省自然科学基金资助项目(No.S2012010010327)

摘　　要：为了快速动态测量树脂基复合材料内部的受力变形情况,利用光学干涉谱域相位对照B扫描方法,对存在孔洞缺陷的树脂基复合材料样件内部的离面位移场和应变场进行了测量。分别对机械载荷和热载荷作用下的复合材料样件进行了弯曲变形和热变形实验,然后对实验中得到的相位差数据进行解卷绕,计算得出了材料内部的离面位移场分布和应变场分布。实验显示:得到的结果能够清晰反映复合材料内部缺陷周围受力变形的动态过程,观测到的材料应力集中区域的位移和应变明显大于完好部分,透视得到了测量材料表层以下1mm连续深度的变形情况。该方法能够实现亚微米级的位移场测量精度,并可对材料的变形过程进行动态测量,是一种进行材料力学特性分析的有效手段。To measure the stress and deformation inside resin composites rapidly and dynamically,a Bscan method based on phase contrast spectral optical coherence tomography was employed to measure the out-of-plane displacement field and strain field of the resin composites with voiding defect.A bending experiment and a thermal deformation experiment were conducted for composite samples through mechanical charging and thermal loading.Then the phase difference data from experiments were unwrapped and the out-of-plane displacement field distribution and strain field distribution were obtained.The results show that the experiments descript clearly of the dynamical deformation course around the voiding defect inside composites,from which bigger displacement and strain have been observed in the stress concentration region rather than the undamaged part,and an area with the depth 1mm below the sample surface is measured.Moreover,this method is able to measure the displacement field in a sub-micro meter level and the deformation courses of composites in dynamics,and is an effec-tive analysis method for mechanical properties of composites.

关 键 词：树脂基复合材料 力学测量 位移场 应变场 光学干涉 B扫描 

分 类 号：TB332[一般工业技术—材料科学与工程] TH744.3[机械工程—光学工程]