排序方式: 共有5条查询结果,搜索用时 0 毫秒
1
1.
2.
3.
Based on the first-order shear deformable beam theory, a refined model for composite beams containing a through-the-width delamination is presented, and the deformation at the delamination front is considered. Different from the ordinary delami- nated beam theory, each of the perfectly bonded portions of the new model is constructed as two separated beams along the interface without assuming a plane section at the de- lamination front. The governing equations of the delaminated portions and bonded ones are established, combined with continuity conditions of displacements and internal forces. Solutions of delaminated composite beams with different boundary conditions, delamina- tion locations and sizes axe shown in excellent agreement with the finite element results, showing efficiency and applicability of the present model. 相似文献
4.
5.
阳极溶出伏安法是一种可以直接用于海水中痕量金属元素检测分析的有效方法,不仅能够实现多元素同时检测,而且不需要样品预浓缩处理.通过伏安极谱仪,研究了富集电位和富集时间等关键参数对阳极溶出伏安法测定痕量金属铜、铅、镉、锌的影响,对过滤后的海水样品直接进行检测,实现了烟台四十里湾不同站位海水中活性态痕量金属铜、铅、镉、锌的测定,为海水中痕量金属元素的形态分析及生物可利用性研究提供了有效技术手段. 相似文献
1