TL;DRAbstract
The fatigue behavior of two different batches of an alumina fiber reinforced aluminum composite (FP/Al) was investigated. Both batches had a nominal 55% fiber volume fraction with fibers uniaxially oriented in the test direction. Tension-tension fatigue tests were conducted on flat, untabbed, contoured specimens in a 90 KN MTS axial fatigue test machine at R = 0.1. The cyclic frequency of the fatigue tests was 30 Hz except for a limited number conducted at various frequencies to determine if fatigue behavior was frequency dependent. Some specimens were strain gaged so that load-strain response could be monitored during fatigue tests. Metallographic and fractographic examination of specimens was conducted to evaluate failure modes and damage mechanisms. Preliminary static and fatigue tests showed a significant difference in mechanical properties of the two batches of FP/Al investigated. The first batch had an endurance limit of 410 MPa compared to 330 MPa for the second batch. Static st
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The fatigue behavior of two different batches of an alumina fiber reinforced aluminum composite (FP/Al) was investigated. Both batches had a nominal 55% fiber volume fraction with fibers uniaxially oriented in the test direction. Tension-tension fatigue tests were conducted on flat, untabbed, contoured specimens in a 90 KN MTS axial fatigue test machine at R = 0.1. The cyclic frequency of the fatigue tests was 30 Hz except for a limited number conducted at various frequencies to determine if fatigue behavior was frequency dependent. Some specimens were strain gaged so that load-strain response could be monitored during fatigue tests. Metallographic and fractographic examination of specimens was conducted to evaluate failure modes and damage mechanisms. Preliminary static and fatigue tests showed a significant difference in mechanical properties of the two batches of FP/Al investigated. The first batch had an endurance limit of 410 MPa compared to 330 MPa for the second batch. Static st
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