Seems that the article asked and provided the answer several ways.
First, it said that microcracking occurs with brittle resins and indicated polyester. Hmm. Then it gave the solution, which is to use modest fraction of ultimate strength. So if you are using polyester resins, which tend to be low strength and low toughness, you also have to use large FOS. Sounds HEAVY to me.
Typically, polyester resins have strain to failure that are less than fiber strain to failure. For instance, most glass cloth has failure strain around 1.5-2%, graphite around 1% and polyester resins have failure strains in the 0.3-0.5% range. Resin failure sets part (bulk) strength at a modest fraction of fiber strength. UGH! Then polyester has some other poor characteristics - just don't go there.
Airplanes are typically made of directional cloths and either vinylester or epoxy resins. These resins have strain to failure in the range of 4 - 7%. Strength of the composite tends to come at fiber limits and at much higher bulk strength than with polyester resin. In airplanes, most of us are working with FOS of 2 over first fiber failure, which means that first fiber to fail is at half of its failure load when the airplane is at limit load and the resin is at around 10% of its strength. Matrix microcracking was postulated to not be much of an issue at these levels of loading in resins...
Sounds to me like you simply do not use polyester resin.
Now look at successful composite airplane designs. Anybody know of any composite structure airplanes using polyester resin? Just epoxy and vinylester in my knowledge. We fair and finish with epoxy too.
Billski