摘要
Threegroupsofexperimentsonbrittle-plastictransitionandinstabilitymodesofgranitewereperformedinatriaxialvesselwithsolidpressuremediumathightemperatureandhighpressure.Theresultsofexperimentsshowthatbrittlefaultingisthemajorfailuremodeattemperature＜300℃,butcrystal-plasticdeformationisdominateattemperature＞800℃,andthereisatransitionwithincreasingtemperaturefromsemi-brittlefaultingtocataclnsticflowandsemi-brittleflowattemperaturesof300～800℃.So,temperatureisthemostinfluentialfactorinbrittle-plastictransitionofgraniteandconfiningpressureisthesecondfactor.Theresultsalsoshowthatprogressivefailureofgraniteoccursatlowerpressureorhightemperaturewherethereiscrystalplasticity,andsuddeninstabilityoccursatroomtemperatureandhighpressure(＞300MPa)orhightemperatureandgreatpressure(550℃600MPa～650℃700MPa),andabroadregimeofquasi-suddeninstabilityexistsbetweentheT-Pconditionofprogressivefailureandsuddeninstability.So,instabilitymodesofgranitedependsimnitaneonslyonthepressureandtemperature.
出版日期
2003年02月12日（中国期刊网平台首次上网日期，不代表论文的发表时间）
