全文获取类型
收费全文 | 87篇 |
免费 | 2篇 |
国内免费 | 3篇 |
专业分类
化学 | 4篇 |
力学 | 61篇 |
综合类 | 3篇 |
数学 | 8篇 |
物理学 | 16篇 |
出版年
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 1篇 |
2018年 | 1篇 |
2017年 | 4篇 |
2016年 | 3篇 |
2015年 | 2篇 |
2014年 | 4篇 |
2013年 | 14篇 |
2012年 | 1篇 |
2011年 | 2篇 |
2009年 | 3篇 |
2008年 | 5篇 |
2007年 | 3篇 |
2006年 | 7篇 |
2005年 | 2篇 |
2004年 | 5篇 |
2003年 | 3篇 |
2002年 | 4篇 |
2001年 | 1篇 |
2000年 | 3篇 |
1999年 | 4篇 |
1998年 | 3篇 |
1997年 | 3篇 |
1996年 | 4篇 |
1995年 | 3篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1988年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有92条查询结果,搜索用时 15 毫秒
51.
ASTUDYOFTHEELASTO-PLASTICAXIALLYTENSILEPROPERTIESOFMETALMATRIXCOMPOSITESWITHFIBER-ENDDEBONDINGSuXiaofeng(苏晓风)ChenHaoran(陈浩然)(... 相似文献
52.
复合材料胶接修补问题的试验研究和分析 总被引:4,自引:0,他引:4
用带中心裂纹的Ly12CZ铝合金板模拟飞机的损伤结构,对于不同的修补方式(单边和双边修补),不同的补片材料(铝合金和复合材料)和几何尺寸以及脱胶等因素,进行了静强度和疲劳裂纹扩展试验. 实验表明. 胶结修补能明显地提高损伤结构的强度和疲劳寿命,同时实验还为修补实践的选材和几何参数的设计等提供了大量数据. 文中最后给出了修补结构疲劳裂纹的有限元计算估计,并与试验结果进行了比较和分析. 相似文献
53.
基于Reddy提出的板高阶剪切变形简化理论,研究了含界面脱粘损伤压电复合材料层合板非线性动力稳定性问题.首先,建立了分层模型,推导了考虑几何非线性、阻尼效应、纵向惯性力和力-电耦合效应的Mathieu方程,并且给出了该方程解的解析表达式.其次,通过典型算例讨论了界面脱粘损伤以及反馈控制力对该层合板动力不稳定区域、纵向、横向共振频率和最大"牵引"深度的影响.由典型算例讨论可知:随着层合板界面脱粘损伤的扩大,其动力稳定性能逐渐减弱,其中在损伤较小时,反馈控制力对智能结构几乎没有影响;而在损伤比较大的情况下,反馈控制力将能有效地减少动力不稳定区域重合面积. 相似文献
54.
On the use of energy methods for interpretation of results of single-fiber fragmentation experiments
《Composite Interfaces》2013,20(5):241-267
_We consider fragmentation experiments as a set of experimental results for fiber break density as a function of applied strain. This paper explores the potential for using fracture mechanics or energy methods in interpreting fragmentation experiments. We found that energy does not control fiber fracture; instead, fiber fracture releases much more energy than required to fracture the fiber. The excess released energy can lead to other damage mechanisms such as interfacial debonding. By assuming that all the excess released energy causes interfacial debonding and balancing energy using the energy release rate for debonding, we were able to determine interfacial toughness from fragmentation experiments. A reliable determination of interfacial toughness requires prior knowledge of interphase stress-transfer properties, fiber failure properties, actual damage mechanisms, and the coefficient of friction at the interface. 相似文献
55.
The presented paper deals with a unidirectional steel wire reinforced aluminum matrix composite manufactured by composite extrusion. The main objective of this work was to determine the effect of heat treatment, and the influence of long solution annealing times on the composites interface regarding microstructural changes and the resulting interface strength. For evaluation of the microstructure high resolution transmission electron microscope (TEM) investigations accompanied with electron dispersive X-ray spectroscopy (EDX) were performed. It could be shown that diffusion from the steel wire into the aluminum matrix occurs and that the diffusion paths as well as particle formation is influenced by the preceded heat treatment. Diffusion paths in the range of 40–150 nm could be observed for Al, Fe, Cr and Ni. After annealing times over 5 h an extensive growth of an intermetallic reaction layer was found. The mechanical properties of the interface were determined by push-out-tests and tensile tests radial to the interface, which provided the debonding shear strength σdeb and for the latter experiment the interfacial radial strength σIR. It has become apparent that debonding shear strength is highly influenced by matrix properties. In radial tensile tests the failure is predominantly controlled by the chemical bond of the interface. It was shown that interface strength of specimen with small reaction zones of about 3 μm were beneficial for the mechanical behavior in both loading conditions. Longer annealing times showed a drastic decrease of interface shear strength. It was concluded from EDX measurements and in comparison with literature that the reaction zone is dominated by the growth of Al5Fe2 (η-phase). 相似文献
56.
Detailed finite element simulations are carried out to study the adhesive contact of viscoelastic spheres. The spheres are brought into contact by a compressive force that increases at a constant rate. Upon reaching a maximum load, the spheres are unloaded until they separate. We studied in detail the effect of loading and unloading rates on hysteresis and on the pull‐off force for a standard viscoelastic solid. The surface interaction is modeled by the Dugdale–Barenblatt model. Numerical results are compared with analytical models for bonding and debonding, including a recent theory proposed by Johnson. There is excellent agreement between analytical and finite element results for the bonding phase. However, for the debonding phase, current analytical models break down unless the loading and unloading rates are slow in comparison with the material relaxation time. Based on the finite element results, a simple approximate analytical model is proposed to quantify adhesive contact in the debonding phase. We also examine the dependence of hysteresis on interfacial parameters such as the cohesive strength and the intrinsic work of adhesion. Our results show that viscoelastic adhesive contact depends on the details of the surface interaction and cannot be determined solely by the work of adhesion. © 2002 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 40: 772–793, 2002 相似文献
57.
对材料界面超高速自相似动态分层的反平面问题进行了解析分析。分层模拟为界面裂纹由零长度自相似扩展,扩展速度为蹭音速或超音速。首先考虑运动集中载荷作用下界面动态分层的情况,利用界面裂纹自相似扩展的运动位错模型将问题归结为奇异积分方程,并求得解析解,分析了裂纹尖端的应力奇性,获得了动应力强度因子。最后,利用叠加原理给出了x^n型载荷作用下界面动态分层的解。 相似文献
58.
A model composite material system was designed to simulate typical damage mechanisms in unidirectional fiber reinforced brittle
matrix composites. Experiments were performed at low to high quasistatic, macroscopic loading rates
. At all loading rates reversal of the transverse strain was observed and was correlated to matrix cracking and debonding.
The optical method of coherent gradient sensing (CGS) was used to obtain qualitative information regarding the stress fields
and to observe the progression of damage. It was found that the sequence of damage formation (damage path) depended on the
macroscopic loading rate. At lower loading rates periodic matrix cracks developed; minimal debonding of the reinforcement-matrix
interface occurred only much later in the experiment. At higher loading rates extensive debonding followed propagation of
the initial matrix crack, and periodic cracking was not observed. Several features of the material response of the model material
system were also observed in a previously studied unidirectional ceramic matrix composite. 相似文献
59.
冲磨和空蚀破坏是水利水电设施最为常见的病害之一,严重影响水利水电设施的安全运行和效益发挥. 泄洪建筑物通常喷涂聚脲基涂层来提高抗冲耐磨性能,但在泄洪高速水流速度作用下抗冲磨聚脲基涂层的剥离破坏机理的研究尚属空白. 本文基于高速水流的流态形式,提出了高速水流对泄洪建筑物的力学作用模型,水流作用对泄洪建筑物的载荷主要包括拖曳力、冲击力、脉动力和上浮力;采用内聚力模型表征聚脲基涂层与泄洪建筑物防护体界面的剥离破坏过程,建立了高速水流聚脲涂层的剥离破坏模型, 给出了模型的有限元形式方程、本构关系以及损伤起始原则、演化原则和接触碰撞模型. 通过聚脲涂层与混凝土基底的剥离破坏试验,分析了不同剥离倾角下界面剥离破坏的拉应力与倾角之间的变化规律,得到了聚脲涂层剥离破坏过程中应力-$\!$-位移变化关系. 根据剥离破坏试验计算了界面剥离破坏断裂模型参数,采用数值方法对模型进行了验证,试验结果与模型计算结果吻合良好,为泄洪建筑物的抗冲耐磨设计提供理论依据. 相似文献
60.
V. V. Zozulya 《International Applied Mechanics》2006,42(7):842-848
A heat-conduction problem is formulated for laminated plates and shells with a heat-conducting layer and debonding between
laminas. The approach consists in analyzing how the layer thickness changes in the process of debonding of laminas and deformation
of plates and shells. The three-dimensional thermoelastic and heat-conduction equations are expanded into polynomial Legendre
series in thickness. The first-order, Timoshenko’s, and Kirchhoff-Love equations are examined. A numerical example of laminated
shells with a heat-conducting layer is considered
Published in Prikladnaya Mekhanika, Vol. 42, No. 7, pp. 135–141, July 2006. 相似文献