ABSTRACT

Tape-based discontinuous composite is a relatively new type of composite material that offers improved mechanical properties for similar process-ability compared to Sheet Moulding Compound or Bulk Moulding Compound. This makes it potentially attractive for the automotive industry. In this paper, a thin-ply carbon fibre reinforced polypropylene-based discontinuous composite is studied. Mechanical tests are performed to obtain the tensile, compression and shear behaviour of the material. The energy absorption via tearing is also studied to assess the suitability of the material for energy absorption applications, such as crash-boxes. The tearing test results show a large degree of plastic deformation and an advancing damage front leading to higher specific energy absorption via tearing compared to conventional composite materials.

摘要

基于胶带的不连续复合材料是一种相对较新的复合材料，与片状模塑料或块状模塑料相比，它具有改进的机械性能和相似的加工能力。这使得它对汽车行业具有潜在的吸引力。在本文中，研究了一种薄层碳纤维增强聚丙烯基不连续复合材料。进行机械测试以获得材料的拉伸、压缩和剪切行为。还研究了通过撕裂进行的能量吸收，以评估材料对能量吸收应用（例如防撞盒）的适用性。撕裂试验结果表明，与传统复合材料相比，较大程度的塑性变形和推进的损伤前沿导致通过撕裂获得更高的比能量吸收。