Impact Induced Stresses, Strains, and Delaminations in Composite Plates
Impact Induced Stresses, Strains, and Delaminations in Composite Plates
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DOI：
10.1177/002199838802200603
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发表时间：
1988-06
影响因子：
2.9
通讯作者：
Hsi-Yung T. Wu;G. Springer
中科院分区：
文献类型：
--
作者：
Hsi-Yung T. Wu;G. Springer
本文提出了一种计算纤维增强复合材料矩形板受固体物体非穿透（低速）撞击时发生脱层的位置和尺寸的方法。板可以沿着其边缘简单地支撑或夹紧。在冲击过程中，板可能会受到面内载荷或面内应变。该方法包括两个步骤。首先，在板的应力和应变计算的三维，瞬态有限元法使用8节点砖元素与非协调模式。其次，通过基于量纲分析概念的失效准则，预测了板内脱层的位置、长度和宽度。有限元法和破坏准则由计算机程序实现，该程序可用于计算冲击器的位置和速度、板的位移、冲击过程中板内的应力和应变以及冲击后脱层的位置和尺寸。进行参数研究，以说明可以由计算机代码生成的信息。
A method is presented for calculating the locations and sizes of delaminations which oc cur in a rectangular, fiber reinforced composite plate sujected to non-penetrating (low velocity) impact of a solid object. The plate may be simply supported or clamped along its edges. In-plane loads or in-plane strains may be imposed on the plate during the im pact. The method includes two steps. First, the stresses and strains in the plate are calculated by a three-dimensional, transient finite element method using 8-node brick ele ments with incompatible modes. Second, the locations, lengths, and widths of delamina tions inside the plate are predicted by means of a proposed failure criterion, which is based on the concept of dimensional analysis. The finite element method and the failure criterion were implemented by a computer code which can be used to calculate the impactor posi tion and velocity, the displacements of the plate, the stresses and strains inside the plate during the impact, and the locations and dimensions of the delaminations after the impact. Parametric studies were performed to illustrate the information which can be generated by the computer code.