Destructive methods, viz. tensile test, bending test, water absorption test, chemical absorption test, and biodegradable test of woven sheep fiber reinforced with 40% and 50% epoxy composites, were studied at different operating conditions. The present investigation is focused on the physical and chemical characterization of the sheep wool fiber-reinforced polymer-matrix composites. Result shows that tensile and bending tests of woven sheep fiber composite of composition (50-50) have high strength and maximum bending compared to woven sheep fiber composite of composition (60-40). The (50-50) composition is having more moisture absorption than (60-40) composition, whereas (60-40) composition has more chemical absorption than (50-50) composition. Biodegradable test shows that compositions (50-50) and (60-40) after few days gain almost the same amount of weight. Destructed surfaces were examined using scanning electron microscope.

The wear behaviour of polytetrafluroethylene (PTFE) filled with 25% glass and 40% bronze particles was studied on a pin on disc test rig. Solid lubricant composite materials were prepared by compression moulding technique. The wear parameters considered for the study were applied load, sliding speed and sliding distance. The experimental results indicate that the weight loss increases with increasing load, sliding speed and sliding distance, as expected. Sliding distance has more effect on weight loss followed by applied load. The 40% bronzezPTFE composite exhibits better wear resistance compared to other types. The dominant interactive wear mechanisms during sliding of PTFE and its composites are discussed in this paper.

An attempt has been made to study the influence of wear parameters like applied load, sliding speed, sliding distance on the dry sliding wear of polytetrafluroethylene (PTFE), PTFE þ 25% glass and PTFE þ 40% bronze composites. Experiments, based on the techniques of Taguchi, were performed to acquire data in a controlled way. An orthogonal array and the analysis of variance were employed to investigate the influence of process parameters on the wear of composites. The worn surfaces were examined using scanning electron microscope (SEM). The experimental results show that sliding distance and applied load were found to be the more significant factors among the other control factors on wear. The objective is to establish a correlation between dry sliding wear of composites and wear parameters. These correlations were obtained by multiple regressions. A good agreement between the predicted and actual wear resistance was seen.