| 慕琴琴*,燕群,杭超,徐健.不同厚度及冲击角度对复合材料平板抗冲击能力的影响[J].实验力学,2023,38(1):142~150 |
| 不同厚度及冲击角度对复合材料平板抗冲击能力的影响 |
| Effect of different thickness and impact angel on the impact resistance of composite flat panels |
| 投稿时间：2022-03-01 修订日期：2022-05-18 |
| DOI：10.7520/1001-4888-22-051 |
| 中文关键词: 机织复合材料机匣 抗冲击能力临界速度 平板厚度 弹体撞击角度 包容性 |
| 英文关键词:woven composites casing critical velocity of impact resistance plate thicknesses bullet impact angles containment |
| 基金项目:国家科技重大专项(2017-VII-0011-0106)资助 |
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| 中文摘要: |
| 为了考核叶片飞脱碎片撞击机匣的抗包容能力，采取钛合金方块作为弹体撞击复合材料平板机匣进行等效模拟。通过获取弹体不同冲击角度撞击不同厚度平板时的抗冲击临界速度，得到复合材料机匣在不同工况下的抗冲击能力极限。基于试验所获得的物理参数，进一步分析了抗冲击临界速度、应变响应、位移响应等关键物理量随平板厚度及撞击角度变化的规律。结果表明，复材平板抗冲击能力对厚度较为敏感，但呈非线性变化趋势；复材表面压应力会抑制表面裂纹的扩展，且厚度越大，这种效应越明显；机织复合材料结构抗冲击能力和裂纹扩展速度与其内部经纬纱编织角度有密切关系，且呈非单调关系。本文提出的等效考核机匣结构抗包容能力的试验方法和获得的试验数据可为真实机匣包容性试验的顺利完成提供支撑，降低适航试验取证的风险。 |
| 英文摘要: |
| In order to assess the anti-inclusion process of the blade out debris impacting casing, the titanium alloy square was used as the bullet to impact composite flat plate for equivalent simulation. By obtaining the critical speed of the impact resistance, the impact resistance limit of the composite receiver under different working conditions was obtained when the bullet impacts the flat plate of different thicknesses at different impact angles. Based on the physical parameters obtained by the test, the laws of changes of key physical quantities such as impact critical speed, strain response and displacement response with the thickness of the plate and the impact angle were further analyzed. It is found that the impact resistance of composite flats is more sensitive to thickness, but shows a nonlinear trend. The compressive stress on the surface of composite material inhibits the expansion of surface cracks. The greater the thickness there is in composite flats, the more obvious there is for this effect. The impact resistance and crack propagation speed of the woven composite structure are closely related to the weaving angle of its internal warp and weft yarn, which is non-monotonous. The test method and obtained test data for the equivalent assessment of the containment resistance of the casing structure proposed in this paper can provide support for the successful completion of the real casing containment test and reduce the risk of airworthiness test certification. |
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