Copper/Titanium Dioxide (CuTiO₂) samples were fabricated at three temperatures (450 C, 650 C, 850 C) using: a universal testing machine (quasi-statically at the strain rate of 8נ10^–3 s⁻¹), a drop Hammer (dynamically at the strain rate of about 8נ10² s⁻¹), and a modified Split Hopkinson Pressure Bar (strain rate of about 1.6נ10³ s⁻¹). The effects of reinforcing particle size on relative density and damage parameter of Cu reinforced by 0, 2.5, 5 and 10% volume fractions of nano- and micro-sized TiO₂ were investigated. The results indicated that the size of TiO₂ particles, loading rate, and temperature had significant effect on relative density and damage parameter. The results also showed that the Quasi-Static method was superior to the other two methods. In addition, by increasing temperature, the mechanical properties of the composites were improved. The results showed that the effect of nano sized reinforcement particles on damage parameter was more profound than micro sized reinforcement particles. In this work, a new damage model considering the effects of strain rate, temperature, volume fraction and the aspect ratio of particles on damage parameter was proposed. The damage parameter was obtained using relative density and elasticity modulus. The results showed significant difference between the two methods. However, the density method yields more accurate and realistic results.

铜/二氧化钛 (CuTiO ₂ ) 样品在三个温度（450 C、650 C、850 C）下使用：万能试验机（准静态应变率为 8נ10 ^–3 s ^-1）、落锤（动态应变率约为 8 נ10 ² s ^-1），以及改进的 Split Hopkinson 压力棒（应变率约为 1.6 נ10 ³ s ^-1）。研究了增强粒径对体积分数为0%、2.5%、5%和10%的纳米和微米TiO ₂增强Cu的相对密度和损伤参数的影响。结果表明，TiO ₂的粒径颗粒、加载速率和温度对相对密度和损伤参数有显着影响。结果还表明，准静态方法优于其他两种方法。此外，通过升高温度，复合材料的力学性能得到改善。结果表明，纳米尺寸的增强颗粒对损伤参数的影响比微米尺寸的增强颗粒更显着。在这项工作中，提出了一种新的损伤模型，考虑了应变率、温度、体积分数和颗粒纵横比对损伤参数的影响。使用相对密度和弹性模量获得损伤参数。结果表明两种方法之间存在显着差异。但是，密度方法会产生更准确和更真实的结果。