The conventional woven fabrics (plain, twill, satin, etc.) have yarn undulations, that may lead to the fibre breakage and loss of mechanical strength. This problem was resolved using unidirectional woven structures having straight yarns, but they provide strength in one direction only. A possible solution is the use of biaxial fabric having yarns at ±45 ° as reinforcement, but its fabrication cost is too high. The current study focussed on the development of a composite material using conventional fabrics having comparable properties with biaxial fabric composites. Three different reinforcements (plain, twill and unidirectional) were prepared using glass fibre. For composite fabrication, plies were cut, stacked at ±45° and infused with unsaturated polyester resin to produce a composite equivalent to the biaxial composite. Similarly, the stitched composites were also fabricated by stitching the similar stack (using chain stitch class 101) before impregnating with resin. Laminated composites from biaxial fabric (both stitched and unstitched) were also produced for comparison. All these composites were characterised for tensile and impact properties. The tensile strength of stitched unidirectional composites was higher as compared to the other woven and biaxial structures. Similarly, the impact strength was also higher for stitched unidirectional composite. Hence, the ±45° stacked unidirectional composite may be used as a potential replacement of biaxial composite.

常规机织织物（平纹，斜纹，缎纹等）具有纱线起伏，可能会导致纤维断裂和机械强度降低。使用具有直纱线的单向编织结构解决了该问题，但是它们仅在一个方向上提供强度。一种可能的解决方案是使用具有±45°纱线的双轴织物作为增强材料，但其制造成本过高。当前的研究集中在使用具有与双轴织物复合材料可比性能的常规织物的复合材料的开发上。使用玻璃纤维制备了三种不同的增强材料（普通，斜纹和单向）。对于复合材料制造，将板层切割，在±45°处堆叠并注入不饱和聚酯树脂以生产与双轴复合材料相当的复合材料。同样，在用树脂浸渍之前，通过缝合类似的叠层（使用链式针迹类101），还可以制造缝合的复合材料。还生产了双轴织物（缝合和未缝合）的层压复合材料以进行比较。所有这些复合材料均具有拉伸和冲击性能。与其他机织和双轴结构相比，单向缝合复合材料的拉伸强度更高。同样，单向缝合复合材料的冲击强度也更高。因此，±45°堆叠的单向复合材料可以用作双轴复合材料的潜在替代品。还生产了双轴织物（缝合和未缝合）的层压复合材料以进行比较。所有这些复合材料均具有拉伸和冲击性能。与其他机织和双轴结构相比，单向缝合复合材料的拉伸强度更高。同样，单向缝合复合材料的冲击强度也更高。因此，±45°堆叠的单向复合材料可以用作双轴复合材料的潜在替代品。还生产了双轴织物（缝合和未缝合）的层压复合材料进行比较。所有这些复合材料均具有拉伸和冲击性能。与其他机织和双轴结构相比，单向缝合复合材料的拉伸强度更高。同样，单向缝合复合材料的冲击强度也更高。因此，±45°堆叠的单向复合材料可以用作双轴复合材料的潜在替代品。