ABSTRACT Machining of high strength and shock-absorbent Metal Fiber Laminate (MFL) becomes inevitable to attain the geometric shape and size, as to validate the functionality in various impact protection environments. A class of titanium metal laminate alternatively interleaved with high strength basalt and shock absorbing flax fibers have been machined with an abrasive water jet method. Machining experiment trials with WJP-water jet pressure, TS-traverse speed, SOD-stand-off distance, and AMFR-abrasive flow rate and parametric optimization on quality factors of surface roughness (Ra) and kerf ratio (KR) were done using a Central Composite Design (CCD)-Response Surface Methodology (RSM). Experimental investigation reveals that the surface roughness and kerf ratio significantly decreased by 27.59% and 9.16% as water jet pressure was increased to peak value. Similarly, abrasive mass flow rate raised to its higher value, the Ra and KR slightly decreased by a margin of 6.5% and 2.5%. However, a reverse effect on surface roughness and kerf ratio was observed as an increase of SOD and TS. Surface topology analysis reveals that the material removal mechanism of the Ti sheet is shear plastic deformation with plowing marks, that of basalt fiber is brittle fracture with micro-chipping, and that of flax fiber is bulk machining.

中文翻译：

---

钛金属交错玄武岩-亚麻纤维层合板的磨料水射流加工

摘要 高强度和减震金属纤维层压板 (MFL) 的加工成为不可避免的获得几何形状和尺寸，以验证在各种冲击保护环境中的功能。一类交替交织高强度玄武岩和吸震亚麻纤维的钛金属层压板已经用磨料水射流方法加工而成。使用 WJP 水射流压力、TS 横移速度、SOD 间隔距离和 AMFR 磨料流量进行加工实验试验，并对表面粗糙度 (Ra) 和切口比 (KR) 的质量因素进行参数优化，使用中央复合设计 (CCD) - 响应面方法 (RSM)。实验调查表明，表面粗糙度和切口比显着降低了 27.59% 和 9。16%，因为水射流压力增加到峰值。同样，磨料质量流量上升到较高值时，Ra 和 KR 略有下降，幅度分别为 6.5% 和 2.5%。然而，随着 SOD 和 TS 的增加，观察到对表面粗糙度和切口比的反向影响。表面拓扑结构分析表明，Ti片材的材料去除机制为带有犁痕的剪切塑性变形，玄武岩纤维的材料去除机制是微碎屑的脆性断裂，亚麻纤维的材料去除机制是块状加工。