Continuous-discontinuous sheet moulding compounds - Effect of hybridisation on mechanical material properties
Continuous-discontinuous sheet moulding compounds - Effect of hybridisation on mechanical material properties
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DOI：
10.1016/j.compstruct.2018.05.048
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发表时间：
2018-10-15
影响因子：
6.3
通讯作者：
Weidenmann, Kay Andre
中科院分区：
文献类型：
--
作者：
Trauth, Anna;Weidenmann, Kay Andre
不连续纤维增强聚合物为制造具有复杂几何形状的部件提供了很高的设计自由度，但由于有限的纤维长度和纤维取向，机械性能受到限制。为了克服这一缺点，连续-不连续片状模塑料（CoDicoSMC）旨在将不连续的短切玻璃纤维增强复合材料以及单向的连续碳纤维增强复合材料的优点联合收割机结合起来。成功实施了允许制造连续碳纤维增强SMC的所采用的SMC工艺。混合SMC组合在一次压缩成型过程中。SMC的混合增强了材料的机械性能，拉伸（+171%）和压缩（+151%）弹性模量和拉伸强度（+204%）显著增加。层合板的最终刚度可以通过修改的混合规则来描述。损伤的特征在于连续碳纤维层的逐渐失效，由于纤维间断裂和纤维断裂，随后是层间分层和不连续相的失效。
Discontinuous fibre reinforced polymers offer a high design freedom to manufacture parts with complex geometries, but due to the finite fibre length and fibre orientation, mechanical performance is limited. To overcome this drawback continuous-discontinuous sheet moulding compounds (CoDicoSMC) aim to combine the advantages of discontinuous, chopped glass fibre reinforced as well as unidirectional, continuous carbon fibre reinforced composites. An adopted SMC process allowing for the manufacturing of continuous carbon fibre reinforced SMC was successfully implemented. The hybrid SMC was combined in a one-shot compression moulding process. Hybridisation of SMC enhanced mechanical material properties with a significant increase in tensile (+171%) and compressive (+151%) moduli of elasticity and tensile strength (+204%). The resulting stiffness of the laminate can be described by a modified rule of mixtures. Damage is characterized by a progressive failure of the continuous carbon fibre layers, due to interfibre fractures and fibre breakage, followed by interlaminar delamination and failure of the discontinuous phase.