This paper analyzes the nonlocal thermal buckling and postbuckling behaviors of a multi-layered graphene nanoplatelet(GPL)reinforced piezoelectric micro-plate.The GPLs are supposed to disperse as a gradient pattern in...This paper analyzes the nonlocal thermal buckling and postbuckling behaviors of a multi-layered graphene nanoplatelet(GPL)reinforced piezoelectric micro-plate.The GPLs are supposed to disperse as a gradient pattern in the composite micro-plate along its thickness.The effective material properties are calculated by the Halpin-Tsai parallel model and mixture rule for the functionally graded GPL reinforced piezoelectric(FG-GRP)micro-plate.Governing equations for the nonlocal thermal buckling and postbuckling behaviors of the FG-GRP micro-plate are obtained by the first-order shear deformation theory,the von Kármán nonlinear theory,and the minimum potential energy principle.The differential quadrature(DQ)method and iterative method are introduced to numerically analyze the effects of the external electric voltage,the distribution pattern and characteristic of GPLs,and the nonlocal parameter on the critical buckling behaviors and postbuckling equilibrium path of the FG-GRP micro-plate in thermal environment.展开更多
三元硫族化合物与其二元的同类相比,因其多出的第三种元素而产生的协同作用和化学计量变化带来了新奇的物理化学性质,从而受到了广泛的关注.在本文中,我们通过液相剥离法成功制备了高质量的二维硒化镍钽(Ta_(2)NiSe_(5))纳米片,并进一...三元硫族化合物与其二元的同类相比,因其多出的第三种元素而产生的协同作用和化学计量变化带来了新奇的物理化学性质,从而受到了广泛的关注.在本文中,我们通过液相剥离法成功制备了高质量的二维硒化镍钽(Ta_(2)NiSe_(5))纳米片,并进一步研究了其超快载流子弛豫特性以及非线性光学吸收特性,从而发现了所制备的Ta_(2)NiSe_(5)纳米片具有出色的宽带可饱和吸收性能.此外,利用所制备的Ta_(2)NiSe_(5)纳米片作为可饱和吸收体,实现了在1.0,2.0和2.8μm处的全固态调Q脉冲激光.同时,在1.0μm处也实现了脉冲宽度短至356 f s的固体连续锁模激光.这项工作不仅证明了Ta_(2)NiSe_(5)具有优异的非线性光学特性和光调制性能,而且为探索三元硫族化物材料的光子和光电特性铺平了道路.展开更多
基金Project supported by the National Natural Science Foundation of China(Nos.11802005,12172012,11832002,and 11427801)the General Program of Science and Technology Development Project of Beijing Municipal Education Commission of China(No.KM201910005035)
文摘This paper analyzes the nonlocal thermal buckling and postbuckling behaviors of a multi-layered graphene nanoplatelet(GPL)reinforced piezoelectric micro-plate.The GPLs are supposed to disperse as a gradient pattern in the composite micro-plate along its thickness.The effective material properties are calculated by the Halpin-Tsai parallel model and mixture rule for the functionally graded GPL reinforced piezoelectric(FG-GRP)micro-plate.Governing equations for the nonlocal thermal buckling and postbuckling behaviors of the FG-GRP micro-plate are obtained by the first-order shear deformation theory,the von Kármán nonlinear theory,and the minimum potential energy principle.The differential quadrature(DQ)method and iterative method are introduced to numerically analyze the effects of the external electric voltage,the distribution pattern and characteristic of GPLs,and the nonlocal parameter on the critical buckling behaviors and postbuckling equilibrium path of the FG-GRP micro-plate in thermal environment.
基金financially supported by the National Natural Science Foundation of China (61975095, 61675116, and 61575110)the Young Scholars Program of Shandong University (2017WLJH48)+3 种基金the Youth Cross Innovation Group of Shandong University (2020QNQT)the Key Research and Development Program of Shandong Province (2019JZZY020206)Shenzhen Science and Technology Research and Development Funds (JCYJ20180305163932273)the Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices (KF201908)
文摘三元硫族化合物与其二元的同类相比,因其多出的第三种元素而产生的协同作用和化学计量变化带来了新奇的物理化学性质,从而受到了广泛的关注.在本文中,我们通过液相剥离法成功制备了高质量的二维硒化镍钽(Ta_(2)NiSe_(5))纳米片,并进一步研究了其超快载流子弛豫特性以及非线性光学吸收特性,从而发现了所制备的Ta_(2)NiSe_(5)纳米片具有出色的宽带可饱和吸收性能.此外,利用所制备的Ta_(2)NiSe_(5)纳米片作为可饱和吸收体,实现了在1.0,2.0和2.8μm处的全固态调Q脉冲激光.同时,在1.0μm处也实现了脉冲宽度短至356 f s的固体连续锁模激光.这项工作不仅证明了Ta_(2)NiSe_(5)具有优异的非线性光学特性和光调制性能,而且为探索三元硫族化物材料的光子和光电特性铺平了道路.
