Importanceof stressconditionsCharacteristics of granular materials are highlydependentonstressconditionsTheamountoflateralsupportisessentialAugust31,2025艺TUDelft
August 31, 2025 6 Importance of stress conditions • Characteristics of granular materials are highly dependent on stress conditions. • The amount of lateral support is essential
Materialmodels6b.linearelastica.Perfectlystiffc.not linearelasticif loading and unloadingtheoreticalcasefollow lineA,if unloadingfollows lineBthennotelastice.stiff,plastic withf.elastic,perfect plasticd.perfectplastichardeningh.not linearelasto-plasticwithg.elasto-plasticwithhardeningTUDelfthardening
August 31, 2025 7 a. Perfectly stiff b. linear elastic c. not linear elastic theoretical case if loading and unloading follow line A, if unloading follows line B then not elastic B A d. perfect plastic e. stiff, plastic with f. elastic, perfect plastic hardening g. elasto-plastic with hardening h. not linear elasto-plastic with hardening Material models
PlasticityloadThe slider is used toschematizeplasticitydisplacementAugust31,20252TUDelft
August 31, 2025 8 Plasticity load displacement The slider is used to schematize plasticity
Elasto-perfectplasticbehaviourloaddisplacementAugust31,2025TUDelft
August 31, 2025 9 Elasto – perfect plastic behaviour load displacement
Generalizedstress-straincurveinfailuretestStrainatstressbreakStressatbreakdeformationpermanentelastic10August31,20252TUDelft
August 31, 2025 10 Generalized stress – strain curve in failure test stress Stress at break Strain at break deformation P C permanent elastic